Air Pressure Testing presents a unique selling point for the developer and the consumer. Heating bills will be reduced - 47% of the UK's CO2 emissions are from homes. Air pressure testing will lead to heat loss reduction and also reduces noise transfer through air leakage paths.
For a successful test and subsequent cost reduction, air permeability must be considered before and not after the build.
Air leakage is the uncontrolled flow of air through gaps and cracks in the building envelope. This is not to be confused with ventilation, which is the controlled flow of air into and out of the building through purpose-built ventilators. Air leakage in dwellings through cracks around doors, window frames and electrical and plumbing connections makes for significant heat loss. With recent improvements in the insulation of walls and glazing, this loss has become more significant.