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Part L

Part L of The Building Regulations 2000 cover Conservation of Fuel & Power. The latest edition is dated April 2006 and is split into four sections:-
  1. Existing Dwellings
  2. New Dwellings
  3. Existing Buildings other than Dwellings
  4. New Buildings other than Dwellings
These regulations cover such subjects as energy performance requirements, the insulation values of building elements, the allowable area of windows, doors and other openings, air permeability of the structure, the heating efficiency of boilers and the insulation and controls for heating appliances and systems together with hot water storage and lighting efficiency.

All these regulations have to be taken into account when a new boiler or system is fitted.