Coastal BC summers have become warmer and, in some years, much warmer than residents have traditionally expected. Keeping your home cool without leaning entirely on air conditioning is both an energy-saving and a comfort strategy worth building into your summer routine.
Work With the Temperature Difference
The biggest free tool you have is the temperature swing between day and night. On the South Coast, evenings and early mornings are often significantly cooler than afternoon peaks. Open windows wide overnight and in the early morning to flush warm air out and pull cool air in. Once outdoor temperatures start climbing — often by mid-morning — close windows and draw blinds or curtains, especially on east- and west-facing glass.
Block Heat Before It Enters
Up to 30% of unwanted heat enters a home through windows. Exterior shading — a patio umbrella, an awning, or even a simple roller shade mounted outside — is far more effective than curtains alone, because it stops radiant heat before it passes through the glass. Interior blackout curtains are still worthwhile and much better than nothing.
Reduce Heat Sources Inside
- Cook outside or use smaller appliances. An oven can raise your kitchen temperature significantly. A barbecue, air fryer, or countertop convection oven generates far less ambient heat.
- Run appliances in the evening. Dishwashers, dryers, and washing machines all generate heat. Scheduling them after sundown reduces the load on your cooling strategy.
- Switch to LED bulbs if you haven't already. Incandescent and halogen bulbs release a significant portion of their energy as heat.
Use Fans Strategically
A ceiling fan doesn't cool air — it creates a wind-chill effect that makes you feel cooler. Make sure yours is set to spin counter-clockwise in summer (creating a downdraft). A box fan placed in a window facing outward on the shaded side of your home is more effective at exhausting hot air than simply letting air drift through.
Consider a Programmable or Smart Thermostat
If you do use air conditioning, a programmable thermostat ensures it's not working against you overnight or when the house is empty. Many BC Hydro customers are eligible for rebates on qualifying smart thermostats — worth checking before your next purchase.
A few small adjustments can make your home genuinely more liveable on hot August days without a significant energy cost.