Design and Construction of the Hickory Hall Dormitory a twin study in the making Presented by Adam J. Cohen, Architect, CPHC NA & EU, LEED AP

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual North American Passive House Conference September 27-30, 2012 Denver CO Design and Construction of the Hickory Hall Dormitory a twin study in the making

Presented by Adam J. Cohen, Architect, CPHC NA & EU, LEED AP

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual North American Passive House Conference September 27-30, 2012 Denver CO Session Learning Objectives: • Outline the envelope differences between Elm Hall (std. construction) and Hickory Hall (Passivhaus construction) • Show a basic understanding of the economic feasibility of Hickory Hall vs. Elm Hall • Describe the mechanical system strategy employed in Hickory Hall. • Describe why a dormitory with a double loaded corridor makes an efficient Passivhaus.

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 Emory and Henry College, Emory, Virginia

Emory, Virginia

• Founded in 1836, opened its doors to students in 1838 • Oldest college in Southwest Virginia • One of only a few colleges in the country whose entire campus is listed on the National Historic Register • Dr. Rosalind Reichard, Emory & Henry’s 20th president is very progressive

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 HICKORY

CHESTNUT ELM

• New residential quad planned in 2006-2008 • Elm Hall completed in 2010 • Hickory Hall to be completed December 2012 • Chestnut Hall tentative construction date 2014

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 Hickory Hall Elm Hall Under Construction Completed August 2010 • 40,000 sq ft • 36,000 sq ft • 117 beds • 116 beds • Modular wooden construction (3 floors) • Modular wooden construction (3 floors) • Full concrete basement • Partial CMU basement (balance crawl space) • Passivhaus & LEED • LEED

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 • Airtightness – not yet quantified

• Hickory Hall assumed .6 ACH50 • Elm Hall assumed 6 ACH50 • Slab - Added 4” termite treated EPS • Walls • Concrete – Changed to insulated precast with interior insulated wire chase (2x4) • Walls added 2 ½” Roxul Cavity Rock exterior insulation • Roof – Added 2” cellulose • Windows - Changed to PH certified windows (25% reduction in heat demand!) 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 • Plug, Lighting & HW Load Reduction Measures • Go to 1000 rpm washers instead of 600 to reduce dryer energy (suggested 1200 rpm) • Go to motor driven elevator • Occupancy sensors everywhere • Not Implemented: • Dorm room energy feedback and competition • Solar HW heating 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 Heat Balance 300000 Annual Heat Demand = 1.5 250000 kBTU/sqft yr!

200000 /yr] Useful Internal Heat kBTU Gain [kBTU/yr] 150000

Heat [ Annual Useful Solar Heat Gain [kBTU/yr]

Annual 100000 Annual Heat Losses 50000 [kBTU/yr]:

0 Losses Gains

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 • To determine room peak loads • Heating • Upper northwest corner (3 sides exposed, twin window) • Minimalist occupants • Cooling • Center south (1 side exposed, twin window) • Maximalist occupants 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 Mechanical System

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012 CONTACT: [email protected] (540) 774.4800

7th Annual National Passivhaus Conference Denver, Colorado Sept. 27 – 30, 2012