The majority of homes in Metro Vancouver were built without central air conditioning. For most of the year, that's fine — but BC summers are getting hotter, and a few fans and open windows aren't always enough anymore.
Here's what actually works, from free tactics to the best permanent upgrades.
Free and Low-Cost Tactics
Cross-Ventilate at Night
BC nights are still relatively cool even in summer. Open windows on opposite sides of your home after 9pm to create cross-ventilation and let cooler air flush out the heat built up during the day. Close everything up in the morning before it gets hot.
Block the Sun
Up to 30% of unwanted heat enters your home through windows. Close blinds and curtains on south and west-facing windows during the hottest parts of the day. Blackout curtains make a noticeable difference.
Use Fans Strategically
A box fan in a window blowing outward on the top floor pulls hot air out of the house. Ceiling fans should rotate counterclockwise in summer to push cool air down. Fans cool people, not rooms — they only help if you're in the room.
Minimize Heat Generation
Avoid using the oven during peak heat hours. Switch to LED bulbs if you haven't already. Run the dishwasher and dryer at night. Small changes add up when your house is already holding heat.
Affordable Permanent Solutions
Ductless Mini-Split System
This is the most popular cooling upgrade for Vancouver homes without ductwork. A mini-split installs in a day, requires no ductwork, and can efficiently cool one or multiple rooms. It also heats — so it's useful year-round. Prices start around $3,500–$6,000 installed for a single zone.
Heat Pump System
For whole-home cooling and heating, a heat pump connected to your existing ductwork is the gold standard. With BC's 2026 rebates, this can be surprisingly affordable — and it will reduce your gas bills significantly.
What Doesn't Work as Well as People Think
- Portable AC units: Inefficient, loud, and they exhaust hot air back inside if not properly vented
- Window AC units: Fine for a single room but won't manage whole-home heat
- Swamp coolers / evaporative coolers: Don't work well in BC's humidity levels
Frequently Asked Questions
Why does my AC stop working during a heat wave?
Heat waves push AC systems beyond their design capacity. Common causes include a dirty air filter restricting airflow, a frozen evaporator coil from running the system too hard, a tripped circuit breaker from electrical overload, or low refrigerant. Start with the filter and breaker panel before calling a technician.
How long does it take to fix an AC that stopped working?
Simple fixes like filter replacement or resetting a breaker take minutes. Refrigerant recharges or component replacements typically require a same-day or next-day service call. During heat waves, Grove Mechanical prioritizes emergency cooling calls — call 604-371-4949.
Should I repair or replace my AC if it breaks down?
If your system is under 10 years old and the repair is under $500, repair is usually the right call. If the system is over 12–15 years old, or the repair cost exceeds 50% of replacement cost, a new system — especially a heat pump — is the better long-term investment, after reviewing the current system and active provider terms.
Can I run my heat pump in cooling mode during a heat wave?
Yes — modern heat pumps are designed to cool as well as heat. Set your thermostat to "cool" mode and your desired temperature. If the system isn't keeping up, check the filter and ensure the outdoor unit has at least 2 feet of clearance on all sides.