Controlling airflow between a home’s interior and exterior is one of the most important and cost-effective ways to build more comfortable and energy-efficient homes. warm in winter and cool in summer.
The way the walls, roof and foundation are constructed affects a building’s ‘airtightness’ and the importance of measuring airtightness will be demonstrated in Prince George this Friday (tomorrow) by local certified energy advisor https://energystepcode.ca/energy -advisers/ , Rod Croome.
Croome will use a “blower door test” to identify areas of a home that have air leaks. Assessing air leaks before the building is complete and still under construction allows contractors to repair leaks before exterior and interior finishes are applied.
“The test is actually quite simple but very effective,” said Croome, who founded Hometech Energy Solutions in Prince George 15 years ago. “Once the doors and windows are installed, we replace an exterior door with a fabric tarp and a large fan that pulls air out of the building and depressurizes the interior. Then we use equipment to identify exactly where the air is leaking into the house, simulating cold air in winter or hot air in summer.
The results of the blower door test indicate the airtightness of the house and are measured in “air changes per hour”. The lower the number, the more airtight the building envelope.
“There’s a belief that a house shouldn’t be too tight and should breathe,” Croome said. “We also breathe, but we don’t breathe all over our bodies. Our breathing is controlled by our nose and mouth. It’s the same with houses; we can control how and where a home breathes to make it more comfortable, less drafty, more durable and potentially cheaper to operate.
Energy modeling and blower door testing will be required for all new construction in Prince George beginning in September https://www.princegeorge.ca/Business%20and%20Development/Pages/BuildingPermits.aspx, by which time the Energy Step Code https://energystepcode.ca/ takes effect locally. The province is also updating the BC Building Code to match the Energy Step Code. Together, these updates will ensure that new buildings are more energy efficient.
“Change is coming and we want to make sure local builders are not only ready, but able to be at the forefront,” said Terri McConnachie, CEO of the Canadian Builders Association. homes in northern British Columbia. “Demos like the one we’re offering on Friday give our builders first-hand exposure to techniques like blower door testing that they can easily incorporate into their processes.”
The event is part of Building a Legacy – North https://www.communityenergy.ca/bal-north/ , a partnership between CHBA Northern BC and the Community Energy Association to provide resources and training for construction professionals in the North, local governments and real estate agents. , and consumers. Since its debut in early 2021, Building a Legacy – North has offered webinars and trainings that have attracted over 1,300 registrants.