Monitoring Results – Ethelred Estate

Chris Dunham, Carbon Descent13th July 2010

Eco Buildings - Retrofit

Monitoring

Socio-economics - resident surveys Logging temperature and electricity demand

profiles in 72 flats – half of which received energy advice

Still to analyse: Logging electricity supply to blocks Boilerhouse gas use CHP PV

Resident Surveys

Doorstep survey Before and “After” 2009 and 2011 Randomly selected sample of 79 (of 297 flats) 29 questions

Satisfaction

Comfort

Comfort

•Can't keep flat a comfortable temperature as there is a problem with cooling - can't open the windows enough to get a breeze as there are still workmen outside and it is dusty.•Winter is better but summer is worse. Hard to ventilate during hot weather - bought two fans.•Problem with thermostat x 2•Heating not working

Knowledge

Knowledge

Current Lifestyle

Current Lifestyle

In Summary

More people are certain that they know less People are doing roughly the same or less about

it More people are happy with what they do Broadly in line with the national picture High level of satisfaction with the refurbishment

and thermal comfort standards

Behaviour Change

2 groups: test & control - Feb-June 2011 Both groups received logging equip (without

displays) – temp and electricity Test group received energy advice Identical distribution of bedrooms and total

occupants in each group Almost identical cooking fuels/appliances Similar distribution between 3 blocks (which are

identical except for height) 2 doorsteppers – one giving advice – one

installing meters – around 40mins per flat

Loggers

Cost of Advice

£1,780 (excluding kit) £24 per flat Electricity saving 7,116kWh = 3.6tonnes CO2 Gas saving? 11tonnes CO2 No persistence £435 per tonne C 4 years £54 per tonne C

Conclusions

Controls need clear labelling/instructions Comfort temperatures are much higher than

generally assumed in modelling – implications for plant sizing

Energy advice seems to show a small effect on demand temperatures even in the absence of financial incentives and on electricity demand

This effect either decreases with time relatively quickly OR has a seasonal relationship

Cost effectiveness depends on persistence Huge scope for behaviour change in comfort

temperatures