Preparing Home Ventilation for Sea to Sky Winters

Winter in the Sea to Sky corridor puts more demand on home ventilation than most climates. Homes are sealed up, showers and dryers run more, and heavy snow can interfere with the very vents that are supposed to carry moist air outside. A few things are worth checking before and during the cold months.

Keep exterior vent terminations clear of snow

Bathroom fan, dryer, and range hood ducts all terminate outside, and in places like Whistler or higher-elevation Squamish neighbourhoods those terminations can be buried or iced over by snow. A blocked termination means the exhaust has nowhere to go: moisture backs up in bathroom ducts, lint and damp air back up in dryer runs. Terminations in snow-heavy locations should be placed high enough and detailed so they keep clearing; check that they aren’t drifted over after big snowfalls.

Watch for condensation from cold ducts

Any duct carrying warm, moist indoor air through a cold space (an attic, a crawlspace, an exterior wall) will try to condense moisture if it isn’t insulated. In winter this is when uninsulated bathroom fan ducts and HRV intake runs start to drip. Insulated ducting and sealed joints are what prevent it.

Dryer venting works harder in winter

Cold, damp air and longer drying loads make dryer venting matter more. A long, ribbed, or lint-clogged run that’s merely annoying in summer can leave clothes damp and the dryer overworking in winter. Smooth rigid duct, a short route, and a clear exterior hood with a working damper keep it moving.

HRV and ERV systems through the cold

Tightly built corridor homes rely on an HRV or ERV for fresh air, and winter is when they earn their keep. Make sure intake and exhaust terminations are clear of snow, and that the ducting carrying cold outside air is insulated so it doesn’t sweat indoors. A system that’s balanced and clear keeps fresh air coming in without dumping heat or creating moisture.