Top Heating Mistakes Homeowners Make in Winter (and How to Avoid Them)

When temperatures drop, most homeowners turn up the heat and hope for the best. But small heating mistakes can quietly waste energy, drive up bills, and make your home less comfortable — especially during Michigan’s long winters.

Here are some of the most common heating mistakes homeowners make and how to avoid them this season.

1. Ignoring Your Furnace Filter

A dirty or clogged filter is one of the biggest causes of poor heating performance. It restricts airflow, forces your furnace to work harder, and can even lead to breakdowns.

Fix: Check your furnace filter every 30 to 60 days during winter. Replace it when it looks dusty or gray — clean air means better comfort and efficiency.

2. Closing Too Many Vents

It might seem smart to close vents in unused rooms, but doing so can cause air pressure imbalances that strain your heating system.

Fix: Keep most vents open for proper airflow and consistent warmth throughout your home. If you have temperature differences between rooms, consider zoning solutions or a duct inspection.

3. Setting the Thermostat Too High

Cranking the thermostat won’t heat your home faster — it just makes your system run longer, using more energy.

Fix: Set your thermostat to a steady, comfortable temperature (around 68°F when you’re home) and lower it slightly when you’re away or sleeping. A programmable or smart thermostat can help automate these adjustments.

4. Skipping Annual Maintenance

Many homeowners only call for service when something breaks. But skipping routine maintenance means small issues go unnoticed — until they become expensive repairs.

Fix: Schedule a pre-winter tune-up with a trusted HVAC professional. Regular servicing keeps your system efficient, extends its life, and ensures safe operation.

5. Ignoring Humidity Levels

Dry indoor air is a hidden comfort killer in winter. It can cause static, dry skin, and make rooms feel colder than they actually are — leading you to turn the heat up even more.

Fix: Add a whole-home humidifier to balance moisture levels and improve comfort. You’ll feel warmer at lower temperatures and reduce energy use.

6. Forgetting About Air Leaks

Even the best furnace can’t compete with drafts. Leaky windows, doors, and ductwork let warm air escape and cold air sneak in.

Fix: Seal gaps with weatherstripping or caulk, and have your ducts inspected for leaks. It’s one of the simplest ways to boost efficiency and comfort.

7. Not Upgrading an Outdated System

If your furnace is over 15 years old, it may be running at low efficiency — costing you more in energy every month.

Fix: Consider upgrading to a high-efficiency heating system. Modern furnaces and heat pumps use less energy, deliver better comfort, and can pay for themselves in savings over time.

Staying warm in winter shouldn’t mean wasting energy or sacrificing comfort. Avoiding these common heating mistakes will help you enjoy a cozier, more efficient home — all season long.

At Douglas Heating Supply, we carry a full range of furnaces, filters, humidifiers, and heating accessories to keep your system performing at its best.