The Ultimate HVAC Winter Checklist for Ontario Homes: Stay Warm, Safe, and Efficient in 2025

Ah, winter in Ontario! Where snowbanks are as high as our hopes for spring, and layering up becomes a national sport. As much as we love a good snow day, the colder months come with their own set of challenges. But don’t worry; we’ve got your back (and your furnace) covered with the ultimate Winter Checklist for 2025.

This guide will help you prepare your home, HVAC system, and daily routines to survive Ontario’s infamous winters. Whether you’re sipping a double-double or shovelling your snow-clad driveway, this checklist will keep your home warm, your energy bills low, and your winter blues at bay.

1. Show Your Furnace Some Love

Let’s face it: your furnace is the MVP of winter. Without it, you’re basically camping indoors. So give it the necessary care it deserves.

• Schedule a Furnace Tune-Up: Don’t wait until your furnace conks out during a snowstorm. Call in an HVAC professional to inspect, clean, and service your system. Regular maintenance can improve efficiency and extend its lifespan.
• Replace the Air Filter: A clogged filter forces your furnace to work harder, leading to higher energy bills and potential breakdowns. Replace your filter every 1–3 months for optimal performance.
• Test the Thermostat: Is your thermostat accurate and responsive? If not, consider upgrading to a programmable or smart thermostat to save energy and money.

Pro Tip: If your furnace has seen better days, now might be the time to upgrade. Look for energy-efficient models eligible for government rebates in Ontario.

Read More: Save Big On Home Upgrades with Rebates!

2. Seal the Deal: Draft-Proof Your Home

Drafts are like uninvited guests—they sneak in and make everything uncomfortable.

• Inspect Windows and Doors: Check for gaps or leaks around frames. Seal them with weatherstripping or caulking to keep the cold air out and the warm air in.
• Upgrade to Energy-Efficient Windows: If your windows are older than your favourite hockey jersey, it might be time for an upgrade. Double-glazed or triple-glazed windows can significantly reduce heat loss.
• Insulate Like a Pro: Proper insulation in your attic, walls, and basement is essential for keeping your home warm and energy-efficient.

Pro Tip: Use a candle or incense stick to detect drafts. Hold it near windows and doors—if the flame flickers, you’ve got a draft to seal. (insulation 101 blog)

3. Prepare Your HVAC System for Winter

Your HVAC system works overtime in winter, so it’s important to keep it in tip-top shape.

• Clean Vents and Registers: Dust and debris can block airflow, making your system work harder. Vacuum vents and ensure they’re not obstructed by furniture.
• Check the Ductwork: Leaky ducts can waste up to 30% of your heated air. Seal any visible leaks with duct tape or consult a professional for a thorough inspection.
• Humidifier Maintenance: Winter air can be as dry as a snowblower’s humour. If you have a whole-home humidifier, clean it and replace the filter to keep your home comfortable.

Pro Tip: If your HVAC system is due for an upgrade, consider a heat pump. They’re energy-efficient and work well in Ontario’s climate. (winter checklist landing page)

4. Keep the Snow at Bay

Ontario winters are beautiful—until you have to shovel your driveway. But snow isn’t just a hassle for your car; it can also affect your home.

• Clear Snow from Vents and Intakes: Blocked vents can cause dangerous carbon monoxide buildup. Regularly check and clear snow from your HVAC system’s outdoor components.
• Protect Your Outdoor Heat Pump: If you use a heat pump, keep it free of snow and ice to maintain efficiency. Consider investing in a heat pump cover.
• Inspect Your Roof: Heavy snow and ice can damage your roof and gutters. Remove excess snow and check for ice dams to prevent leaks and water damage.

Pro Tip: Keep a roof rake handy—it’s the Canadian winter equivalent of a superhero gadget.

5. Winterize Your Plumbing

Frozen pipes are the last thing you want to deal with during a cold snap.

• Insulate Exposed Pipes: Use foam pipe insulation to protect pipes in unheated areas like basements, attics, and garages.
• Drain Outdoor Faucets: Shut off the water supply to outdoor faucets and drain any remaining water. This prevents pipes from freezing and bursting.
• Keep the Heat On: If you’re travelling, set your thermostat to at least 15°C to prevent frozen pipes.

Pro Tip: Open cabinet doors under sinks to allow warm air to circulate around the pipes.

6. Stock Up on Winter Essentials

Don’t wait until the first snowstorm to realise you’re out of salt or snow shovels.

• Snow Removal Tools: Make sure your snowblower, shovels, and ice scrapers are in good condition. Stock up on de-icing salt or eco-friendly alternatives.
• Emergency Kit: Prepare for power outages with flashlights, batteries, blankets, and non-perishable food. Don’t forget a portable phone charger.
• Firewood and Heating Backup: If you have a fireplace or wood stove, stock up on dry firewood. Consider a backup generator for extended outages.

Pro Tip: Keep your vehicle winter-ready too! Snow tires, an ice scraper, and an emergency kit are must-haves.

7. Go Green and Save Energy

Winter can be tough on the environment—and your wallet. Here’s how to save energy without sacrificing comfort:

• Lower Your Thermostat: Lowering the thermostat by just 1°C can save up to 5% on your heating bill. Use blankets and sweaters to stay cosy.
• Use Natural Heat: Open curtains on sunny days to let in natural warmth. Close them at night to keep the heat in.
• Unplug and Save: Electronics and appliances can still consume energy when turned off. Unplug them or use a power bar with an on/off switch.

Pro Tip: Check if your utility provider offers off-peak rates for electricity and adjust your usage accordingly.

8. Stay Safe and Sound

Winter isn’t just about staying warm—it’s about staying safe too.

• Install Carbon Monoxide Detectors: Ensure you have working detectors on every floor of your home. Test them regularly and replace the batteries as needed.
• Fire Safety: Keep space heaters at least one metre away from flammable materials. Never leave them unattended.
• Drive Safely: Slow down on icy roads and keep an emergency kit in your car.

Pro Tip: Teach your kids winter safety basics, like avoiding icicles and staying away from snowploughs.

Why This Checklist Matters

Ontario winters can be as unpredictable as a puck in a shootout. But with a little preparation, you can enjoy the season without the stress. From maintaining your HVAC system to winterizing your home and stocking up on essentials, this checklist has you covered.

At LG Home Comfort, we’re here to help you stay warm, safe, and energy-efficient all winter long. Whether you need a furnace tune-up, duct cleaning, or a full HVAC upgrade, our team of professionals is just a call away.

Final Thoughts: Embrace Winter Like a True Ontarian

Winter isn’t going anywhere, so you might as well face it head-on. With this checklist, you’ll be ready for whatever Mother Nature throws your way—from snowstorms to frigid temperatures.

So, bundle up, turn up the heat (but not too much), and let’s make Winter 2025 the coziest, safest, and most efficient one yet. After all, we Canadians are nothing if not resilient—and maybe just a little too proud of our ability to handle the cold.