Air-sealing a building and ventilating it are not opposing goals — they are the same goal, done deliberately. A leaky building 'ventilates' through random cracks: unfiltered, unrecovered, and driven by weather rather than need. A tight building replaces that accident with a plan.

What heat-recovery ventilation does. An HRV moves stale air out and fresh air in through separate airstreams that exchange heat in a core — fresh air arrives tempered instead of raw. The result is continuous, filtered fresh air with far less energy penalty than open windows or leaks.

Where it fits in the project. The ventilation conversation belongs at the design stage, alongside the air barrier — duct routing wants to be drawn, not improvised. Sizing and system selection are design tasks for your professional of record; our department stocks the units and components, and our courses teach the principles so you can hold your own in the meeting.