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Damon Hart-Davis @DamonHD
, 23 tweets, 3 min read Read on Twitter
#carbonoutofheat this morning
Jenny Hill of CCC says 23M UK homes on gas grid.
Jenny Hill on heat pumps £300bn CAPEX bill but defanged by OPEX and other benefits such as energy security. Cost of kWh heat similar for heat pump and gas now.
Tim Rothersay says heat is bad or boring: customers just want to be kept warm at a price.
Gov says -20% of heat should be on district heat.
District heat works best in dense urban areas. #carbonoutofheat
UK district heat costs higher than eg Germany and France and regulations weak compared to gas and electricity.
Dave Pearson talking about river source heat pumps.
Points out that fossil fuel imports increasingly bad for balance of trade never mind CO2
Maybe PAYG heat pumps part of soln, already happening in Austria. Maybe #HaaS baby steps?
Update SAP with current electricity carbon intensity.
Andrew H if ETI talking about domestic retrofit.
Balance between building efficiency and fuel carbon intensity.
Significant defects in existing housing stock.
Comfort may be more important than payback in many cases.
Some simple supply issues to fix such as SRMHRV pipes long enough to get through fatter properly insulated wall!
Answering Qs : 1.6M gas boiler sales per year in UK, and biggest market in world.
NS suggests all new build should get heat pumps. What about balance of gas boiler sales over current 18k heat pump sales?
TR says RHI model wrong (and he helped design it) because heating is distress purchase not business investment. Talking HaaS!
Shameless plug of @OpenTRV and @myRadbot and @HaaS!
Everyone furiously agreeing on #HaaS and improved controls.
Also should aspire to CoP of 4 for heat pumps.
Lots of talk about hybrid e+g heating, he small heat pump plus gas to cover peak demand. But can't do CCS with 23M nat gas boilers.
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