Radiator TRV's
Ther will be far less loss through a few lagged pipes than vast
areas of radiator heating unused rooms needlessly anyway.
But what turns the boiler off? The approved document requires a boiler
interlock that turns the boiler off when no heat is required. You may think
it OK to reduce your overall efficiency by around 10% by running the boiler
when all the radiators are off, but the government disagrees.
Christian.
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