Saving Energy at Home

Nicola Terry Nicola.qeng-ho.org Energy-surprises.blogspot.com Energy and Carbon Emissions: the way we live today Transition Cambridge – Cambridge Carbon Footprint

This work is licensed under a Creative Commons Attribution- ShareAlike 4.0 Intternational License. http://creativecommons.org/licenses/by-sa/4.0/ Why do you want to save energy?

• Reduce energy bills • Reduce carbon emissions

Does it matter?

How can we save energy?

Services Savings

• Space heating • Reduce waste

• Water heating • Reduce requirement

• Cooking • Increase efficiency

• Lighting and appliances

Space heating – Reducing heat loss

Measure Savings Easiness Loft/cavity insulation +++ ++ Solid wall insulation +++ + Floor insulation ++ ++ Double/secondary glazing ++ +/++ Secondary is easier Curtains/blinds + +++ Fix draughts +++ +++ Heat recovery ventilation ++ + controlled ventilation ++ ++ Shock ventilation ++ +++ Space heating – Reducing heat loss

Measure Savings Easiness Loft/cavity insulation +++ ++ Green Solid wall insulation +++ + Deal Floor insulation ++ ++ Double/secondary glazing ++ +/++ Secondary is easier Curtains/blinds + +++ Fix draughts +++ +++ Heat recovery ventilation ++ + Humidity controlled ventilation ++ ++ Shock ventilation ++ +++ Simple home heat loss model

http://nicola.qeng-ho.org Space heating – Where are the draughts?

• You tell me Space heating - Where are the draughts?

• Doors/windows

• Floorboards

• Skirting

• Pipes and cables that go through walls, floors, roofs

• Loft hatch

• Cat flaps/letter boxes

• Chimneys

Space heating – Reducing heat requirement

• You tell me Space heating – Reducing heat requirement

Measure Savings Easiness Turn down +++ +/++ Depends on who lives in the home Adjust valves ++ +++ Adjust timers ++ +++ (optimum start) Move the thermostat ++ ++ (wireless) Heat yourself +++ ++ Space heating – Increase heating efficiency

• You tell me Saving energy – Heating efficiency

Measure Savings Easiness Condensing +++ ++ Radiator reflector panels ++ +++ Bleed radiators ++ +++ Radiator shelving ++ ++ Radiator position ++ +/++ Depends on your room layour Hot water savings

• You tell me Hot water savings

Measure Savings Easiness Lag pipes ++ +++ Check tank thermostat + +++ Shorter showers ++ ++ Low flow shower head ++ +++ Don’t run the hot tap unless +/++ +++ you want hot water Depends on pipe run Cooking

• You tell me Cooking

Measure Savings Easiness Lids on saucepans ++ +++ Use microwave (reheat solid food, + +++ cook vegetables in little water) Heat only the water you need ++ +++ (kettle, boiling)

When you use the oven fill it up ++ ++ Lights and appliances

• You tell me TV size/energy label

600

500 A+++ Size matters 400 A++ 300 A+ more than A 200 B energy label Maximum on-power W on-power Maximum 100 C 0 D 14 18 22 26 30 34 38 42 46 50 54 58 62 66 70 Length of diagonal (inches)

A A+ 32” 43 W 33 W 42” 69 W 53 W 52” 102 W 79 W Energy certificates

Look for kWh/annum Lights and appliances

Measure Savings Easiness Use the sun to dry your washing ++ +++ Turn things off (TV, games + +++ consoles, microwave…) Buy smaller ++ +++ Buy efficient +++ ++ Discard old appliances ++ +++ Analysing your electricity use At nicola.qeng-ho.org Wrap up

• Main messages • Lots of ways to save energy – many quick wins • If you fix draughts you must consider ventilation • When you buy or change something, think small, efficient, energy saving features

More information

• www.transitioncambridge.org/faqs

• energy-surprises.blogspot.co.uk