Why is that?If the OP does not have them, he will have to fit TRVs,If you have TRV's fitted then big is best, as it cover severe weather.
Why is that?If the OP does not have them, he will have to fit TRVs,If you have TRV's fitted then big is best, as it cover severe weather.
Why is that?If the OP does not have them, he will have to fit TRVs,If you have TRV's fitted then big is best, as it cover severe weather.
Nope, it is a recommendation, not compulsory with a boiler swap.
The latest version is CHeSS 2008.My CHeSS is 2005 em
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