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Finally a straight answer!!! and as mine is not cost effective I will not be fitting a two zone heating system in my house. Thanks for all your help people!

Couldn't agree more dcawkwell!!! But what do the regs say and will my plumber require it? I understand that since October 2010 that changed - all homes less than 150m2 now need dual zones according to the law. TRVs are not adequate to create a separate zone. The big question is really -...

Hi, Installing my own central heating system, house had no heating other than gas fires when I started. Cant get a straight answer on the requirement of dual zones. My house is small and has a large central open stairwell which means any one of the four rads I'm installing would heat...