Monodraught Harnessing our Natural Resources

Contents ...from 2000 years experience. Page 3 Monodraught Company Profile The "Windcatcher" principle, of encapsulating any prevailing wind, originated some 2,000 years ago in Page 4 Windcatcher Natural Ventilation systems the Middle East, where "Wind Towers" were often a common sight. The modern Monodraught Windcatcher is an extension of this principle but is also a development of the highly successful Page 5 Windcatcher – the driving force Monodraught Vertical Balanced-flue system invented in 1965 (William Stranks, Patent No.1063909). This unique Monodraught Balanced-flue arrangement of entraining air into the boiler room for Page 6 Fire Dampers & Security/Noise Transmission combustion ventilation from roof level has now been utilised by almost all leading companies in the UK to provide optimum ventilation for any boiler house configuration. The Monodraught Windcatcher natural Page 7 Night-Time Cooling ventilation system, which evolved from the Balanced-flue system, was launched in 1995. Page 8 Designing a Natural Ventilation system The Monodraught Vertical Balanced-flue system, the forerunner of the Monodraught Windcatcher system, takes ventilation air from the top of the Page 9 Windows and Door Openings chimney – the same pressure zone as the flue outlet – to create the correct ‘balanced’ conditions for optimum boiler efficiency. Page 10 BRE Test Results A single composite unit – available in any size, for single or modular boilers – meets all requirements for a highly cost-effective and efficient combustion air, ventilation and flueing system. The effect of downdraught is eliminated, Page 11 BRE Test Results regardless of outside wind conditions. A separate brochure is available on the Monodraught Balanced-flue system. Page 12 Controls

Page 13 Summer and Winter Operation

Page 14 Air to Air Heat Recovery system

Page 15 Installation

Page 16 Multi Floor Operation

Page 17 Research and Development

Page 18 Monodraught Bespoke systems

Page 19 Monodraught SunCatchers

2 Monodraught Company Profile Monodraught

This enables designs to be visually systems will be covered by the The Company appealing whilst achieving an normal manufacturer's warranty. Specially designed Windcatchers Monodraught Ltd was founded efficient and practical contribution to installed at Addey and Stanhope School, Deptford, London. The nearly 30 years ago by the present the harnessing of our natural Windcatcher design perfectly Chairman and Managing Director, resources. There is virtually no limit Looking Ahead compliments the architecture of Terry Payne. Since then the to the design potential of this new build structure and By the end of the year 2003, incorporates special acoustic company has specialised in the Monodraught systems, which are Monodraught will have supplied lining and acoustic pods. development of natural ventilation manufactured to a standard range and installed more than 15,000 systems and low energy concepts but bespoke features can always be Windcatcher, SunPipe and for the building environment. incorporated. Systems are manufact- SunCatcher systems on School, ured to any BS or RAL colour. College and University Projects, as well as Offices, Secure Unlimited Design Establishments, Leisure Projects Maintenance and Health Centres. Monodraught Potential A particular feature of Monodraught are committed to establishing A significant feature of the systems is the emphasis on low renewable energy concepts that Monodraught product range maintenance. Manufactured in GRP, replace the need for air continues to be the high level of all Monodraught systems are covered conditioning during summer architectural and design empathy by a unique 25 year guarantee. months and the need for electric achieved through design flexibility. Dampers and controls fitted into the lighting during daylight hours.

Plymouth University where 7 No. 1000mm diameter Windcatchers were installed.

Left: Windcatchers installed at the Buddhist Temple and Chanting House at Taplow Court. Monodraught 3 Natural Ventilation systems

W.H. Smith 11 of the 27 Windcatchers installed Windcatcher Natural Headquarters, at WH Smith Headquarters. Swindon Ventilation systems The Monodraught Windcatcher Mr Geoff Peters system has proved to be the most Consulting Engineers: Applied Energy, Cobham, Surrey effective method of providing natural ventilation to any These award winning offices, commercial building, by built in 1985, were designed as encapsulating the prevailing wind low energy structures, without air from any direction. Clean, fresh air, conditioning or mechanical relatively free from contamination ventilation. Since then, the or traffic pollution, is entrained at increased use of PCs, the roof level and is carried down to increased number of staff and the rooms below through a effects of higher summertime controlled damper arrangement. temperatures has meant that the The ventilation effect is similar to internal environment had displacement ventilation. become unbearable by 1999. Twenty seven Monodraught 1m Night time cooling is achieved square Windcatchers were Detail of Windcatchers without compromising the security installed for WH Smith Ltd. installed at approximately 25% of of the building. Warm stale air is the cost of air conditioning with exhausted by the passive stack remarkable results. All problems quadrants of the Monodraught of overheating and poor air system and replaced by cool fresh quality have been eliminated and air taken in from roof level. the 500 staff now enjoy fresh air This Windcatcher arrangement, into their offices throughout the pioneered by Monodraught, is now year and all this without costing widely recognised as the most hardly a penny in running costs. Extensive use was made of reliable and effective means of external solar shading to the harnessing the wind’s potential as existing building, so as to reduce the effect of solar a renewable energy source. gain to these offices in summer months – but all to Initial capital costs are often less no avail – hence the need for additional ventilation! than half the cost of air conditioning and there are no running or energy costs.

4 Monodraught Putting the wind to work

Monodraught Kings Hill Offices, West Malling, Kent Windcatcher Client: Tonbridge & Malling District Council The Driving Force Consultant: Bailey & Associates Contact: Steve Bailey Wind Driven Contractor: Try Accord Wind movement striking the Monodraught system is captured A total of 15N° Monodraught by the louvres serving the quadrants Windcatcher systems were and internal turning vanes on the installed to these newly built windward side turn the air through Council Offices designed to be 90°. The force of the wind is driven as ‘green’ as possible. The down into the room or space below Windcatchers provide natural and, having a greater density than ventilation to both First Floor and the internal air, this cooler incoming Ground Floor offices. air flows down to floor level whilst the less dense warmer internal air The Building Engineering rises and exits through the passive Department of Brunel University stack quadrants as a form of have carried out two displacement ventilation. As the in-depth monitoring studies wind changes direction at rooftop during the summer months of level, the system quadrants also 2001 and 2002 at Kings Hill change their function to continually Offices and submitted a Paper provide the incoming air and on the results to the World extract stale air from the building. Internal views of the offices Renewable Energy Congress in showing the diffusers serving the first floor and ground floor Cologne in July 2002. Temperature Driven areas, with the main air duct Stack effect is achieved as a result passing down through the first Due to the success of the of the difference between the air floor offices. Windcatcher systems installed at temperature inside and outside of Kings Hill Offices, Kent County a building – and the subsequent Council have said they are imbalance effect on air density and looking to use Monodraught pressure gradient of the internal systems wherever possible in and external air masses, results in their future building programme the warm air rising up through the for both new build and existing quadrants. buildings.

Monodraught 5 Natural Ventilation systems

Sheffield Secure Unit, Fire Dampers and Limb Lane, Sheffield Security Specifier: Sheffield City Council Design & Build Services Architects: Mr David Pollitt and Mr Tony Blackstock Fire dampers can be incorporated into the design of the Monodraught Seventeen Windcatchers installed, serving bedrooms, staff rooms and ventilation stacks without having corridor areas. The building was completed in March 1997 and is one of a any bearing on the effectiveness of number of important ‘green’ engineering projects by Sheffield. the natural ventilation system. All Monodraught systems are manufactured in 3 ply glassfibre with Class 0 fire retardant resin.

Clearly it is not possible to break in to or out of a building through the Monodraught Windcatcher system but, nevertheless, stainless steel security grilles can be University of Bath incorporated into the base of the Tennis Halls, system. Bath, Avon Client: University of Bath, Noise Transmission Estates Department The Monodraught Windcatchers The Tennis Halls are used once were submitted to the BRE a year for the Graduation Acoustics Centre in January 2002 Ceremonies held over two days In 1997 there was a 12°C rise in internal for a series of tests. It was and presented an unusual temperature and a distinct lack of fresh air. By established that in its standard 1999, after the Windcatchers were installed, format, the arrangement of the challenge to Monodraught. As the rise was limited to 7°C and air quality Windcatcher systems has the can be seen from the charts on improved. effect of reducing noise the right, internal temperatures transmission by 26dB as of up to 28°C were reached in compared to an open window. By 1997 and the internal air quality incorporating 15mm acoustic was appalling. This was all cured lining to the trunk, a minimum of a by the Monodraught Windcatchers further 10dB was achieved. Acoustic installed in 1999. pods or other forms of attenuation can also be incorporated.

6 Monodraught Putting the wind to work

Night-Time Cooling Kent Police Headquarters Night-time cooling or ‘free cooling’ Call Centre, Maidstone is considered to be one of the most Specifier: Kent Constabulary Main Design and Build important aspects of natural ventil- Contractor: Try Accord ation strategies. The night-time cooling facility provided by the A total of nine Windcatcher systems were installed to this new Call Centre Monodraught Windcatcher system where so often air quality, overheating and working conditions for Call enables the building to become an Centres has proved to be a problem. A representative from Try Accord, Mr D integral part of the ventilation Cook, said, “The Monodraught Windcatchers have been exceptionally strategy. By cooling the structure successful in bringing in cool, fresh air and extracting stale air from the and the fabric overnight, the building building, the real benefit of which cannot be overstated. One has to take into can become homogeneous with account that this is with 80 to 100 personnel and their PCs”. the ventilation strategy by absorbing some of the heat as a heat sink, Try Accord and Monodraught have also recently installed Windcatcher systems resulting in lower daytime at the Kent Police Safety Training Centre and the Kings Hill Council Offices. temperatures.

The volume control dampers at the The cantilevered first floor running track to Sutton Arena, Sutton, Sutton Arena, served by the Windcatcher base of the Windcatcher systems Surrey natural ventilation systems and SunPipes can be programmed to open fully for natural lighting. Specifier: William Hogan-O’Neil, at, say, midnight to encapsulate the Chartered Architect cool night air. Any prevailing wind Client: London Borough of Sutton carries this air down into the building below. Eight 1m diameter Monodraught Windcatcher natural ventilation systems and fourteen 750mm The ‘cleansing’ effect of the down- diameter SunPipe natural daylighting systems wash of cold air leaves the building have been installed in the superb Sutton Arena interior feeling fresh and clean for Leisure Centre, a new £4.8 million sports facility the benefit of the occupants arriving opened February 2003, providing indoor training in the morning. The dampers would facilities for international level field & track athletes, normally be programmed to close as well as regional clubs and community groups. again at, say, 6am and a temper- ature set limit of 15°C can be The Architect said, "My whole idea from the introduced to ensure that the concept stage was to bring the outside, indoors building is not over-cooled. All this, with daylighting and fresh air to replicate as without compromising the security much as possible outside field and track facilities of the building. in this all-weather Arena.

Monodraught 7 Natural Ventilation systems

Stage 4 : Heat Gains An estimation has to be made on by conventional means can be matched to the requirements of the Designing a Natural The heat gains will vary the building air leakage rate, anticipated to a limited extent. building and the rooms in question. considerably from one room to dependent on many factors and Ventilation System another and depending on the bearing in mind all heat gains are Stage 5: Recommendations Stage 6 : Conclusions The effective design of a predicted solar gain, the lighting calculated on the maximum or Having determined the ventilation We can offer a range of possible Monodraught Windcatcher venti- and equipment heat gains to the ‘worst case’ conditions. For rate required, we can select the alternative sized and shaped lation system is carefully matched area and most importantly, the heat summer use the assumption is size and quantity of the systems to suit the architectural to the volume to be ventilated generated by the occupants made that perimeter windows will Monodraught Windcatcher systems preference of the Client, but still taking into account the fresh air themselves, based on their activity. probably be used in addition to the from our in-house computer observing the strict ventilation requirements and heat gains to be In the example shown this refectory Windcatcher system to provide this programme. The performance of criteria arrived at by our unique dissipated. These calculations generates a total of 16kW which has natural ventilation since, except for each individual Windcatcher can calculation method. A detailed follow a recognised procedure. to be dissipated to atmosphere. internal rooms, natural ventilation be assessed and therefore quotation is also provided.

Stage 1: Project Brief Each project is considered on its own merits since no two jobs are alike and each project must be individually assessed.

Stage 2: Data The ventilation requirements are assessed so they relate directly to the volume of each room and its occupancy. The fresh air requirement is based on the number of Occupants and the use of the building ie. Class Room, Sports Hall, Office, etc.

Stage 3: Fresh Air Requirement Having established the necessary data, the minimum ventilation rate can be determined dependent on the occupancy using a recognised calculation method to provide this vital fresh air requirement.

8 Monodraught Putting the wind to work

Building Regulations with BS 5925, which is the Code of Compliance Practice for ‘Ventilation Principles Windows and Door All Monodraught systems comply and designing for natural with Building Regulations Part F, L1 ventilation’ and are based upon Openings and L2, and BRE Paper IP13/94. CIBSE Guide A for Environmental In summer months, it is not unusual They are designed in accordance Design. for perimeter windows to be opened and this will aid cross flow BS 5295 : 1991 ventilation, with fresh air coming in Table 4. Recommended outdoor air supply rates through windows on the windward side of the building and exhausted Type of space Recommended Minimum through the passive stack element 2 Per Person Per m floor area of the Monodraught system. Warm L/s L/s air will naturally rise and be Office (open plan) – 1.3 exhausted through this passive School Classrooms 8 – stack section. In addition, natural Corridors – 1.3 ventilation will be aided by the external wind movement, creating a negative or suction zone to one side of the Monodraught system as well as the building. This has the effect Commissioning Monodraught’s After of slightly pressurising the building. Upon completion of the building Sales Service and immediately prior to hand-over, Monodraught can now provide a 12 The advantage, however, of the Monodraught’s Control Specialists month maintenance service on all Monodraught Windcatcher system is will attend site to fully commission Contracts. In addition, that in mid-season or at week-ends the automatic digital control Monodraught Control Specialists and evenings when perhaps the package to ensure that all control can return to site by appointment building is not being used, the strategies are correctly programmed, at any time to meet with the system is not dependent on to reflect the finite usage of the Manager of the building to “fine openable windows or vents in the rooms in question and programmed tune” the control strategy to reflect side of the building. When all the to suit the end user or Client’s the Client’s current requirements, external windows are closed, the exact requirements. Summer/winter should the original requirements or Monodraught Windcatcher will still setting periods are agreed, specification change. There is a continue to operate, providing all the together with all time settings. A nominal charge for this service. benefits of this ‘free air conditioning’. laminated instruction/ information The volume control dampers at the sheet is included for each room. base of the Monodraught system at ceiling level will precisely control the amount of airflow through the system.

Monodraught 9 Natural Ventilation systems TEST RESULTS

A four day on-site very high for two of the days 4.5m/s. For G111 it ranged from investigation and report (approx. 29°C), while for the other 2.13ac/hr at 2.6m/s to 4.68ac/hr at by the Building two days it ranged from 18°C to 22°C. 4.1 m/s. Research Establishment The ventilation rates of the lecture The effect of leaving the dampers summarised below has theatres with the Windcatchers to the Windcatchers open in one of proved the effectiveness the lecture theatres overnight closed and sealed was determined Sulphur Hexafluoride (SF6). Three of the Monodraught to find a base comparison. demonstrated the night cooling pairs of small mixing fans mounted University of Windcatcher system Readings were also taken with the in opposing directions in Hertfordshire, under Summer load dampers closed and fully open and stands were placed in both Hatfield were measured on three days in conditions. lecture theatres. The purpose Specifier: University of G105 and four days in G111. The of the fans was to mix the Hertfordshire, Premises The University of Hertfordshire had effect of night cooling from the incoming fresh air with the Department converted what was originally its units was also determined over two tracer gas inside the lecture old mainframe computer room into The existing Lecture Theatres days. Flow visualisation studies theatre. The tracer gas two lecture theatres, G105 and were undertaken on the units using G111 and G105 constructed G111. The single storey, flat roofed smoke as a tracer. A recording of with large flat roof areas, had building had previously been these tests was made on videotape. suffered from severe served by a separate air overheating in summer months conditioning system. There were It was determined that the back- effect of the units. A temperature in previous years. Four no openable windows in either ground ventilation of both lecture difference of approximately 8°C Monodraught Windcatchers lecture theatre. G105 is the smaller theatres (i.e. Windcatchers sealed) was achieved in the lecture have been supplied and 3 of the two with a volume of 458m . was relatively low. With the Wind- theatre overnight. installed complete with 3 G111 had a volume of 769m . catchers unsealed and closed the temperature controlled ventilation rate did not increase Ventilation modulating dampers to achieve The detailed monitoring and significantly. With the Windcatchers Measurements up to 10 ac/hr during summer

measurements were carried out fully open the ventilation rate in Ventilation measurements were concentration was sampled from 1 months and 1 /2 ac/hr during from 10th to 13th August 1998. G105 ranged from 1.24ac/hr at carried out in both lecture theatres three points around the lecture winter months. The external temperatures were 1.7m/s wind speed to 5.2ac/hr at using the tracer gas decay method, theatres and combined before 10 Monodraught Putting the wind to work

opposite segments, even when the wind speed was approx. 2 m/s. At CONCLUSION approx. 4 m/s the effect was much The units supplied 960 I/s more pronounced with a significant and 636 I/s to lecture down flow of air through the Wind- catcher towards floor level. There theatres G111 and G105 did not appear to be any evidence at moderate wind speed. of short-circuiting of the fresh air.

If 50 students occupied When on an occasion the external doors to G111 were opened on a each lecture theatre the Extracts from this Report are day when the wind speed was low air flow rate per occupant reproduced with the kind permission of (2 m/s), brief observations showed would be 19 l/s in G111, Mr Brian Webb of the BRE. A full copy that air entered the lecture theatre and 13 l/s in G105. These and was exhausted through all four of the Report and a video are available are very satisfactory levels ducts of the Windcatcher system. direct from Monodraught Limited. being analysed by a B&K gas ventilated enclosure mounted 1 given these wind speeds analyser. metre above ground level). and temperature levels.

The local wind speed and direction Flow Visualisation Air entered the unit during the ventilation measurements To observe the operation of the were measured using an ultra- Windcatcher units i.e. the air flow through the prevailing sonic anemometer mounted 10 in and out of the units, a smoke wind segment(s) and metres above ground level at the machine was used to generate a exhausted through those top of a telescopic mast. dense white smoke which was on the leeward side. released out through a purpose Internal and external air made four-way adaptor which was temperatures were measured every placed underneath the unit. A There was no evidence of minute, using thermistors videotape record of these flow short-circuiting of the air connected to Grant Squirrel data visualisation tests was obtained movement. loggers. Two loggers were placed along with some still photographs. in each lecture theatre and the Night cooling by the units values averaged. The external The flow visualisation study showed temperature was measured by a that there was a vigorous flow of air provided lower overnight data logger and thermistor located in through one or more segments temperatures. in a Stevenson screen (a white of the Windcatcher and out through Monodraught 11 Natural Ventilation systems

Air Quality Manual Overrides There are three Basic In the case of highly densely A green push button manual Methods of Control populated rooms, such as Conference override is incorporated on the Rooms or social areas, air quality temperature sensor or mounted on Automatic Control sensors are recommended in the face of the Cylon panel. The Remote Control conjunction with temperature sensors. mode of operation is as follows: Manual Control First push hold for two seconds and

1. Automatic Control CO2/Humidity the dampers will remain open for one Panel For more specialised applications, hour (20 minutes in the winter) before

A fully programmable Cylon dedicated CO2 and/or humidity returning to their pre-set position. automatic control panel is included sensors can also be incorporated. Second push and hold for two as standard in the Monodraught seconds the dampers will then package. The Cylon panels are able Room Sensors close fully, irrespective of the to be connected to either Sensors should be ideally located control panel and will then return to temperature, air quality, CO2 or approximately 1.8m from floor level their pre-set condition after one hour humidity sensors, depending upon in an area to which there is no (20 minutes in the winter). the particular application. direct heat gains, such as near Third push and hold for two windows or above equipment. seconds will automatically return The Cylon panel can be located in a the settings to the control panel. plant control room, it does not need Standard Windcatcher Sensor approach to a typical classroom block. to be located in the room that it is serving. Cylon panels can serve multiple rooms, up to eight Class- rooms can be served by one UC16 panel with the following controls.

Temperature One or more temperature sensors are positioned in the room to achieve an average reading. This is Standard Temperature sensor with manual override. the simplest method of Automatic control and is suitable for most applications.

Summer/Winter switching enables the temperature set points to be increased in the winter setting to prevent heat loss during this period. Typical wiring diagram Internal detail of a typical Cylon panel. 12 Monodraught Putting the wind to work

2. Remote Control Night Time Cooling This is a less sophisticated control Summer and Winter The added benefit of night time method and provides remote control Operation cooling cannot be overstated. The to the volume control dampers via Natural ventilation is primarily aimed normal approach is to program the an electrically operated, wall at the summer season. The summer dampers to open fully at 12.00 mounted positioner as shown. The period is normally programmed to midnight to allow the cool night air, user would simply alter the run from April (ie. after the heating assisted by any wind movement, to percentage of damper opening by season is finished) through to the enter the building through the twisting the dial to the desired Wall mounted Remote Positioner. Manual lever/grille detail. end of September, . Monodraught Windcatchers and position to suit the conditions. plunge to floor level. This purges Under summer operation, the the building of stale air and means 3. Manual Control dampers are programmed to suit that the internal building fabric and This is the most basic method of the building requirements, but our structure will be cooled overnight control. Instead of motorised normal recommendation is to to well below daytime temperatures. dampers, manual dampers are commence opening at 16°C to the fitted and are operated by a lever following settings:- This night-time cooling effect at ceiling diffuser level. In the case leaves the building fresh and clean of high ceilings or where access to 17°C 20% open for when the occupants arrive in the dampers is limited, Monodraught 18°C 40% open the morning. It is probably only by can provide a manual winding 19°C 60% open late afternoon that the ingress of air mechanism. As with the Remote 20°C 80% open temperatures in excess of 25°C Control method the user would 21°C fully open simply alter the percentage of and solar gain will have raised temperatures internally. However, damper opening by operating the Under winter operation from even with these ambient lever to open the dampers to the October through to April, the desired position to suit the conditions. dampers can either remain closed temperatures during daytime, the or be set to 5% open to provide benefit of the Windcatcher End Users trickle ventilation depending upon systems, having operated Monodraught supply a laminated A4 the requirements. throughout the night time, will be sheet as standard with every Project, apparent with the constant as part of the operating and Alternatively, for winter operation, the downwash and movement of air maintenance manual, this instruction set point to commence opening can being maintained, which together sheet outlines the controls strategy be set at 22°C, so that at 23°C the with natural passive stack for that particular Project require- dampers would be 20% open. This ventilation, removes the ‘stuffiness’ ment. Because the panel is fully setting allows for any freak that so often plagues buildings programmable, the strategy can be conditions, such as 'Indian summer' during summer months. altered easily on site should it or early solar gain, which may occur require any fine-tuning. Typical Controls Strategy Sheet for End Users during the 'winter' season. Monodraught 13 Natural Ventilation systems

Bridgetown, Air-to-Air Heat Barbados Recovery System for Consultants: Leverage Inc., Barbados Winter Monodraught have developed an Ten GRP 800 Windcatchers were all plastic, fresh air-to-air heat designed and installed by recovery unit, specifically designed Monodraught to serve an indoor to provide cost effective ventilation food market. The gentle offshore during winter months for sea breeze provides the perfect classrooms and offices. With a driving force for Monodraught typical airflow rate of 900m3/hr, this Windcatcher energy free natural will provide 8 l/s per child (currently ventilation systems. Since the air demanded for Schools) in a typical temperature in the West Indies classroom size of 30 pupils. remains the same throughout Features include very low noise the year, there was no need for centrifugal fans with variable speed volume control dampers at the controls, to allow location in the base of the systems and despite classroom space. A unique high the fairly constant high efficiency plate heat exchanger temperatures the Windcatcher (sensible efficiencies in excess of systems still proved extremely 65%) made from re-cycled plastic effective by providing a ensures that the system is virtually unbreakable and maintenance free. permanent ventilation, not only taking out food odours but also HM Treasury, Whitehall, encapsulating the cool, London refreshing sea breeze. This Project demonstrates the wide Architect: Foster & Partners versatile nature and energy-free Contractor: Bovis Lend Lease Ltd operation of the Monodraught A total of 13 No.1000mm square and 2 No. Windcatcher systems, which are 2000 x 1000mm Monodraught Windcatcher now being specified for Projects systems were installed to what is believed to throughout the world. be the first major Government Building in Whitehall to be naturally ventilated.

14 Monodraught Putting the wind to work

Single Ply Membrane Please Note: Installation Service All Monodraught systems feature: Installation For a single ply membrane roof The measurements shown below Monodraught can provide a full •Specially designed louvres to prevent rain ingress The installation of the Monodraught such as Sarnafil Monodraught refer to a standard 600mm system, installation service for all systems •Insulated volume control dampers Windcatcher system is relatively provide a GRP soaker sheet that is but are typical of the tolerances throughout the UK as part of the •Low resistance internal ceiling diffusers simple and the standard upstand fitted to the roof deck and the required for the complete range of standard package, or will provide •Detailed computer modelling for each contract details shown below normally apply. single ply membrane is heat sealed Monodraught Windcatcher natural full working drawings for on-site at design stage including CFD where appropriate in place. ventilation systems. installation. •A 25 year guarantee UPSTANDS Aluminium Upstand Details to suit 600 Square Monodraught system For a standing seam/aluminium for a Tiled Pitched Roof Application Typical Upstand detail to suit Monodraught Square system profile roof a welded upstand should for a Pitched Metal Decking Roof Application be provided by the roofing contractor as part of the normal roof coverings. Alternatively Monodraught can include this work as part of their package.

Existing Roofs For existing metal profile, tile or slate Isometric Detail of Upstand roofs Monodraught can provide a for Square system purpose designed GRP moulded Isometric Detail of Roofing Sheet flashing/soaker sheet for circular systems for each individual Project Upstand Detail to suit as part of their package. Monodraught Square system Upstand Details to suit 600 Circular Monodraught system for a Flat Concrete Roof Slate or Tile for a Tiled Pitched Roof Application Application For a slate or tile roof an 18mm external quality plywood upstand is required, covered with Code 4 lead and this is normally provided by the Upstand Details to suit Monodraught 600 Circular builder. system for a Flat Felt Roof Application

Flat Roof For a flat roof of asphalt or built up felt roofing, Monodraught can Isometric Detail of Upstand provide a galvanised or GRP soaker for Circular system sheet to be built in by the builder. Isometric Detail of Upstand Alternatively, a conventional plywood for Flat Roof upstand should be specified. Monodraught 15 Natural Ventilation systems

St Annes School, Haute Vallée, Jersey Multi Floor Operation Architects: plb architecture, Winchester The 24 Windcatcher systems Consulting Engineers: DJ Hartigan, Jersey installed at St Annes School, Jersey, serve classrooms on both The Windcatchers installed at the £12 million Haute Vallée School were ground floor and first floor, but in runners-up in the prestigious British Steel sponsored Design Sense Award addition, the Monodraught systems product section where 60 entries from 16 countries were short listed. The provide ventilation to the adjoining Windcatchers were the only British entry short listed. The Architects, plb corridors. Internal dividers and wind architecture, in their supporting letter stated, "throughout the hot summer of turning vanes within the Monodraught 1998 there were no reports of overheating despite all the classrooms being Windcatcher system are designed used to capacity." The long curved, fully glazed corridor faces due south in such a way to ensure that both and it is indeed a great compliment to the Windcatcher systems that no intake and extract by natural overheating occurred despite the fact that no form of air conditioning or ventilation will take place mechanical ventilation was in use. irrespective of wind direction. 1000mm diameter ducts conveying ventilation air to ground floor Classrooms.

16 Monodraught Putting the wind to work

Research & Development MONOVENT Monodraught is currently sponsoring research at six Universities; UMIST, Whereas this brochure is aimed at Nottingham, Brunel, Napier, the larger scale Windcatcher Loughborough and Reading to Natural Ventilation systems for further develop natural ventilation commerce and industry, it is and natural daylighting systems. recognised that there is a great demand for smaller Monovent BSRIA with collaborative research SunCatcher systems for Homes, funding from the DTI are developing Doctors’ Surgeries, Shops and a design and application guide for Offices, etc, as well as Domestic roof mounted natural ventilation residential properties. systems. Monodraught, as one of the partners of this research, will Monodraught produce two sizes, provide a technical input into the ABS 350mm and 550mm diameter guide. The work started in Monovent SunCatchers. Full details November 2002 runs over a period are provided in a separate brochure. of 18 months and aims to improve confidence and encourage the widespread uptake of natural venti- lation systems through the develop- ment of practical, robust and reliable methodologies for sizing these systems. The project will involve a mixture of laboratory and field trials.

Monodraught continue to pursue an Queen Elizabeth Sixth Form College, active policy of examining all Darlington, Co Durham possible developments of low energy concepts. Further research is Architect: Browne Smith Baker, Darlington being directed at solar driven extract These smaller systems are available The area once formed an open courtyard, which was roofed over to provide a Library and IT Room. 6 No. GRP 1000 fans that may be used in either as simple Monovent Windcatcher systems were installed through a new concrete roof, to provide natural ventilation – and the College conjunction with our passive ventilation systems or Monovent landscape gardeners were given a free hand to provide an attractive garden-like setting for the new Windcatchers. The ventilation systems and innovative SunCatcher light and ventilation Architects remarked that ever since the building was occupied there had been nothing but praise for the natural ventilation heat recovery systems, all designed systems. provided by Windcatchers as compared to the adjoining, air conditioned, IT Room. A far more pleasant working to unlock the huge potential of environment is immediately noticeable to everyone using the school. naturally driven ventilation systems. Monodraught 17 Natural Ventilation systems

Monodraught Bespoke Systems Such is the versatile nature of the Monodraught systems that they can be used on a wide range of conventional discharge or vent arrangements, providing the benefits of maintenance free architecturally designed outlets to compliment any

© Andrew Southall/arcblue.com building. Bluewater Retail Park, Dartford, Kent. Restaurant, Lisson Grove, London. The Oxo Tower Restaurant. Old Hill Primary School, West Midlands. Mixed mode applications were favoured in the late ‘90s for natural ventilation where doubt was expressed that natural ventilation could indeed be effective through out summer months. Monodraught’s experience has been that where such mixed mode or fan assisted provision has been made in the past, the fans have never actually been called into use, such is the highly effective nature of the Chingford Hall Community Buildings, Essex. University of Hertfordshire, Faculty of Art Collier House, Brompton Road, Chelsea. The Press Association, Howden, East Yorks. and Design. Windcatcher system. Nevertheless such provision of fan assistance can The National Osteoporosis Society Headquarters, Camerton, Nr Bath, Avon. be made without unduly affecting the performance of the system under natural draught conditions.

Monodraught’s design team will Old Hill Primary School, West Midlands. calculate the louvre area required, together with any spigot connections that may be necessary, but all other flashing details and installation requirements will be the same as for any other Monodraught system. Oriel House, Nr. Marble Arch, London. 18 Monodraught Putting the sun and wind to work

The SunPipe system, which is Natural ventilation combined with the Monodraught Windcatcher, to provide the and natural light SunCatcher system, maximises the concept of renewable energy by in a single installation not only reflecting and intensifying The Monodraught SunCatcher has sunlight and normal daylight down proved to be highly popular as a through the mirror-finished internal combination of natural daylight and tube but also to provide all the natural ventilation in one combined ventilation requirements on the system. same basis of the Windcatcher system. With the case of the The heart of the Monodraught SunCatcher, four motorised SunCatcher system is the SunPipe, dampers are incorporated at the Detail of the base of the SunCatcher where the SunPipe features the BMW logo. which is a mirror-finished, highly base of the system to exactly 26 of our 1200mm square SunCatcher systems installed at BMW Design & Facilities Offices at reflective aluminium tube, which is control the airflow. Cowley, Oxford. Architects and Consulting Engineers: W.S. Atkins. an electrolytically enhanced anodised aluminium substrate with Monodraught SunPipes, which are a pure silver base. The system described in a separate brochure, carries a 25 year guarantee against are currently produced in ten discolouration. This specular different sizes ranging from 200mm Internal and external views aluminium surface is coated with to 1500mm diameter as standard. of Natures World, Middlesborough, where a PVD and the presence of a UV SunCatchers are manufactured 2.3m diameter bespoke inhibitor provides outstanding QUV from 400mm to 1500mm both SunCatcher system was durability with no decrease in total circular and square. installed, incorporating a 1500mm dia. SunPipe. reflectance. The special surface The ceiling diffuser is sited treatment provides excellent colour Please ask for separate approx. 6m above floor rendition of natural light. brochure on SunPipe and level and provides an abundance of natural light. SunCatchers. The SunCatcher is the ideal alternative to rooflights and skylights. It is also an ideal method for providing additional natural daylight Monodraught and ventilation to internal rooms or spaces, poorly served by other putting the sun and external glazing. The ‘famous’ Eco House at Nottingham University which wind to work – has had wide publicity in the Architectural press, featured a bespoke pinnacle SunCatcher system, with a it’s only natural! polycarbonate cone. Monodraught 19 Monodraught Halifax House, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SE Tel: 01494 897700 Fax: 01494 532465 email: [email protected] www.monodraught.com July 2003