Forensic airtightness test gives 30% lifetime heating bill savings

Airtightness Test Kit mounted in hallway of London retrofit 2021

Heat, Space and Light Ltd technicians have conducted forensic airtightness testing on a renovated London Victorian end-of-terrace. The results of the four-hour visit will have improved its comfort, energy efficiency and acoustics by up to 30 per cent, and lowered… Continue reading

Cotswold new build is 100x more airtight than Building Regs and 6x more airtight than Passivhaus

It is subtle and understated in its impact on UK housing, but this new build bungalow home is one of the most energy efficient buildings in the world – and represents the future of housebuilding in the UK and Europe.… Continue reading

How airtightness testing differs between Building Regs and Passive House – and why it matters so much

Using a smoke pen to detect leaks during airtightness testing

Building Regulations Part F wants to know how much air (in m3hr) passes through each metre square area of the fabric (m2). This is the Air Permeability (AP or m3.hr/m2) figure of the building. To get the AP figure, one… Continue reading