Water Calculations – Internal Portable Water Usage

Under current Building Regulations (Approved Doc G), all new dwellings are required to demonstrate a minimum level of water efficiency and produce a water calculation for Building Control handover.
Housebuilders can illustrate compliance through two routes:
either using white goods and sanitary ware which meet individual maximum water usage targets;
or via the calculation method which enables housebuilders to optimise water usage more efficiently as preferred across their appliances.
Local Planning Authorities can also request a higher level of water efficiency which can be demonstrated in the same manner.
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