Windows steam up in winter when high indoor humidity meets cold glass. Everyday activities — cooking, hot showers, running the dishwasher, or an HVAC humidifier set too high — add large amounts of moisture to the air. Even breathing adds humidity to your home.
Warm air holds more moisture than cold air. In winter, that warm, humid indoor air meets your cold window glass, cools rapidly, and releases its moisture as condensation — the fog and water droplets you see on the pane. In a tightly sealed Alberta home, the HRV is the appliance meant to exhaust that moisture, and measuring your indoor air tells you whether it’s keeping up.
Run exhaust fans while cooking and showering, dial your humidifier down as it gets colder outside, and make sure your home is moving air properly. If condensation is heavy and persistent, it can point to excess moisture in the system — the same kind of trapped humidity a blocked dryer vent creates. We’re happy to take a look if you’re not sure where it’s coming from.
Persistent window condensation means moisture is building faster than your home can exhaust it. If you have an HRV, a professional HRV cleaning restores the fresh-air exchange that keeps winter humidity in check — honest pricing, no pressure.