BRE IP1/00 PDF

Adequate ventilation is essential for the health and comfort of building occupants, but excessive ventilation leads to energy waste and sometimes discomfort. Often, the planned ventilation is augmented by unwanted infiltration through air leakage paths in the building envelope; this leads to the concept of build tight - ventilate right. Attention has focused on reducing unwanted infiltration by the review of Part L of the Building Regulations, which will lead to reduced energy consumption in buildings to help meet Government targets for CO2 emissions.Published at the request of the Department of the Environment, Transport and the Regions, this Information Paper draws on BRE's experience. Intended for a wide audience, it will interest particularly those involved in the design, specification and supervision of construction of new dwellings.