Ottawa Heat-Wave Survival Guide: Keep Your Cool When “Feels-Like” Hits 45 °C
Environment Canada has placed Ottawa under a heat warning, with humidex values soaring to 45 °C this week ottawa.citynews.ca. That kind of heat can be dangerous—especially for the 40 %–plus of local households that still rely on fans or window units ottawa.citynews.ca. As Ottawa’s community leader in home-comfort services, we want every neighbour—whether you own central air or not—to stay safe and comfortable. Below are our best industry-tested strategies.
1. No Central Air? 12 Proven Ways to Beat the Heat
Quick Fix
Why It Works
Pro Tip from Us
Create a cross-breeze
Drives out hot, stale air
Place a box fan in a north-facing window blowing out and crack a south window open.
Close blinds & curtains by 9 a.m.
Blocks up to 30 % of solar gain
Light-coloured blackout curtains work best on west- and south-facing windows.
Run ceiling fans counter-clockwise
Evaporative cooling can make you feel 4 °C cooler
Turn them off when you leave the room to save energy.
Make a DIY “swamp cooler”
Ice + airflow = spot cooling
Set a bowl of ice in front of a table fan while you work or sleep.
Chill your sheets
Lowers core temp for better sleep
Pop pillowcases in a freezer bag for 10 minutes.
Hydrate relentlessly
Replaces sweat loss and aids natural cooling
Aim for 1 cup of water every 20 minutes when working outdoors.
Take tepid—not icy—showers
Gradual cooling prevents shock & lasts longer
Finish with 30 seconds of slightly cooler water.
Move downstairs
Basements stay 5-10 °C cooler
If possible, sleep on an air mattress in the lowest level.
Switch off incandescent & halogen bulbs
They convert 90 % of power into heat
LEDs cut heat and hydro costs.
Cook outdoors or use a microwave
Ovens add 2-4 °C to kitchen air
Batch-cook at dawn, grill at dusk.
Visit an Ottawa cooling centre
Public AC, Wi-Fi & water
Call 3-1-1 or check Ottawa Public Health’s list of 80+ sites.
Consider a portable or ductless heat pump
Instant relief & future heating savings
We can size, deliver and install in as little as 48 hours.
Heat-safety reminder: If anyone in your home experiences dizziness, rapid heartbeat or confusion, call 9-1-1 immediately — heat stroke is an emergency.
2. Already Have Central AC? Make It Perform Like a Champ
Even the best Lennox or Rheem system will struggle if simple maintenance is ignored. Here’s our “peak-week” checklist:
Swap the filter (again!). A 30-day filter can clog in 10 dusty days; reduced airflow = ice-ups.
Set the thermostat to 25 °C with HOLD. Constant 19 °C targets can overrun coils and double energy use.
Rinse the outdoor coil. Garden-hose from the inside-out (unit off) to blast away cottonwood fluff.
Clear 24 inches of space around the condenser. Bikes, bins and shrubs all impede airflow.
Shade—but never smother—the unit. A north-side awning can cut operating costs 5 %, but leave room to breathe.
Check the condensate drain. A blocked line can shut the system down just when you need it most.
Seal supply ducts in un-conditioned spaces. Leaks in the attic can steal up to 20 % of cooled air.
Use ceiling fans with AC. Each 1 °C you raise the thermostat saves ~3 % on electricity.
Book a professional tune-up. Our “Heat-Wave Fast-Track” service covers refrigerant pressures, blower amperage and safety controls—and moves you to the front of the queue.
Pro move: Join our Family Membership for priority scheduling, discounts off repairs and annual safety inspections—peace of mind for less than a latte a week.
3. Thinking Long-Term? Future-Proof with Cold-Climate Heat Pumps
With Ottawa hydro rates climbing and federal rebates up to $7 100 still available, a cold-climate heat pump can slash summer bills and replace your furnace when it finally retires. Ask us about our zero-down, 0 % financing plans that cost less per month than many emergency repair bills.
4. Quick Emergency Checklist
No cooling at all? Turn the system off for 30 minutes, replace the filter, and restart.
Ice on the lines? Keep the fan on, compressor off until thawed.
Strange smell or breaker tripping? Call us 24/7—electrical issues escalate fast in extreme heat.
Call Us Before You Overheat
We’re a local family business, not a call-centre chain. When the humidex hits 45 °C, our entire team—from dispatch to install—is laser-focused on keeping Ottawa homes safe and cool. Need help right now?
🌱 Ask about eco-friendly upgrades that cut carbon and cooling costs
Stay hydrated, stay cool, and remember—we’re always here for you, Ottawa!
Taylor LewisVice President
Taylor Lewis is a highly accomplished HVAC professional with over a decade of experience in the industry. He graduated from Queens University, and since then has dedicated his career to the field of heating, ventilation, and air conditioning.
