HVAC draft problem during windstorms in Greater Vancouver

When a windstorm rolls in off the coast, many Greater Vancouver homeowners suddenly feel drafts that were not noticeable on a calm day. Strong gusts force air through every gap in the building envelope, making the home feel colder and the heating system work harder to keep up.

Why drafts get worse in high wind

On a still day, small gaps around windows, doors, and the building envelope let only a trickle of air through. During a windstorm, the pressure difference across the home increases dramatically, pushing cold outdoor air in on the windward side and pulling warm air out elsewhere. You feel this as drafts and cold spots, and the heating system runs longer to compensate.

Older Vancouver homes, with their original windows and less air sealing, tend to feel this most. The drafts themselves are an envelope issue, but they directly affect how comfortable your heating keeps the home.

• Gaps around older windows and exterior doors
• Unsealed penetrations where pipes, wires, or vents enter the home
• Worn weatherstripping that no longer seals against wind pressure
• Air leakage around the building envelope amplified by gusts
• Cold air spilling in faster than the heating system can offset

Safe steps to reduce drafts

Address the obvious leaks first. Check and replace worn weatherstripping on doors, use a draft stopper at the base of exterior doors, and keep curtains closed during a storm to add a buffer at windows. Make sure exterior intake and vent terminations are intact after high wind. Inside, set the thermostat fan to circulate air so heat is distributed evenly rather than leaving the windward rooms cold.

These steps reduce the worst of the draft, but heavy air leakage during every storm points to a building envelope that could use attention.

When to involve a professional

If your home feels drafty and struggles to stay warm during every windstorm, and the heating system runs constantly to keep up, the combination of air leakage and heating performance is worth a professional look. HeatLand can assess whether your heating system is keeping pace and recommend improvements so storms no longer leave certain rooms cold and uncomfortable.

Frequently Asked Questions

Why do I only feel drafts when it's windy?

High winds create a strong pressure difference across the home, forcing air through gaps that barely leak on a calm day. That is why drafts and cold spots appear during storms.

Can I fix storm drafts myself?

You can address many of them by replacing weatherstripping, using door draft stoppers, and keeping curtains closed. Larger air-sealing work on the building envelope may need a professional.

Does my heating system make drafts worse?

The drafts come from air leakage, but a poorly balanced system can leave windward rooms colder. Circulating air with the fan and ensuring even distribution helps offset the cold.

Should I be concerned if my heat runs constantly during storms?

Occasional longer runtimes in a storm are normal, but constant running with cold rooms suggests heavy air leakage or a distribution issue worth having evaluated.

HeatLand Heating & Cooling is a licensed and insured, TSBC-certified HVAC company serving homeowners across Greater Vancouver. Our technicians diagnose the real fault, explain your options in plain language, and complete the work safely and to code.

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