[Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings]
From 1st April 2005, revised Approved Document L1 of the Building Regulations sets down revised guidance for the efficiency of hot water central heating gas and oil boilers installed in new and existing dwellings.
To find out more click here to download a copy of Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings.
