Heritage Home Achieves Exceptional Airtightness and Energy Efficiency
We recently completed heat loss and heat gain calculations, along with airtightness testing, on a beautifully restored 1910 home, and the results were outstanding.
Despite its age, this home now performs better than many new builds thanks to extensive insulation and energy efficiency upgrades. During the blower door test conducted as part of the CSA F280 heat loss analysis, the home achieved exceptionally low air changes per hour (ACH), confirming an impressive level of airtightness.
This performance directly translated into measurable results:
- Reduced heating system size by 30–35%
- Smaller ductwork and quieter operation
- Lower long-term energy costs and improved comfort
The success of this project highlights what’s possible when modern building science meets quality craftsmanship. Huge credit goes to the contractor for their meticulous work in achieving such airtight results — a true model of energy-efficient renovation done right.
