When the Iowa winter wind starts to howl and the snow piles up outside, your furnace becomes the unsung hero of your home. But keeping your house warm efficiently isn’t just about turning up the thermostat, it’s about understanding how your heating system really works. Unfortunately, many Des Moines homeowners still believe long-standing HVAC myths that can actually waste energy, strain your furnace, and drive up monthly heating bills.
At Aspen Aire Heating & Cooling, we’ve seen these myths cost Central Iowa homeowners hundreds of dollars every winter. Let’s separate fact from fiction so you can stay warm, safe, and energy-efficient all season long.
Myth #1: Cranking the Thermostat Heats Your Home Faster
The Fact:
Your furnace doesn’t work like a car’s gas pedal, it runs at a consistent rate until it reaches the temperature you’ve set. Setting your thermostat to 80°F when you come home cold won’t make your furnace heat any faster; it will just keep running longer, using more gas and electricity than necessary.
The Fix:
Install a smart thermostat or programmable thermostat to automatically warm your home before you arrive. This keeps your home cozy and efficient without wasting heat.
(Looking for thermostat upgrades in Des Moines? Check out Aspen Aire’s smart thermostat options.)
Myth #2: Closing Vents in Unused Rooms Saves Energy
The Fact:
Your HVAC system is designed for balanced airflow throughout your ductwork. Closing vents in certain rooms increases static pressure, forcing your blower motor to work harder. This can lead to uneven heating, duct leaks, and even furnace overheating.
The Consequences:
- Higher energy bills
- Shortened furnace lifespan
- Possible heat exchanger damage
Pro Tip: Keep at least 80–90% of your home’s vents open for healthy airflow and optimal furnace performance.
Myth #3: Furnace Maintenance Is Only Needed When Something Breaks
The Fact:
Skipping annual maintenance is one of the most common and costly mistakes homeowners make. Regular furnace tune-ups help your system run efficiently, prevent breakdowns, and extend its lifespan.
During a professional furnace tune-up, Aspen Aire technicians:
- Clean burners and check flame sensors for maximum efficiency
- Test for gas leaks and carbon monoxide
- Inspect the heat exchanger for cracks
- Replace worn parts before they fail
Energy Tip for Des Moines Homeowners:
According to the Department of Energy, regular maintenance can improve your furnace’s efficiency by up to 15%, saving money every month through the heating season.
(Schedule your furnace tune-up in Des Moines today.)
Myth #4: Ceiling Fans Are Only for Summer
The Fact:
In winter, reverse your ceiling fan’s direction to clockwise at a low speed. This gently pushes warm air that’s trapped near the ceiling back down into your living space, improving comfort and reducing heating costs by up to 10%.
This simple trick helps your furnace work less, especially in homes with high ceilings or open layouts.
Myth #5: Space Heaters Are More Efficient Than a Furnace
The Fact:
Electric space heaters might feel convenient, but they’re not cost-effective for whole-home heating. Natural gas furnaces are far more efficient for large spaces. Relying on multiple space heaters often spikes your electricity bill and increases fire risk.
If certain rooms in your home stay cold, it’s likely a sign of poor duct design, insulation issues, or an aging furnace (not a need for more space heaters).
Tip: Aspen Aire can perform a home heating efficiency check to identify airflow or insulation problems before you waste more energy.
Myth #6: You Should Cover Your Outdoor HVAC Unit in Winter
The Fact:
Modern outdoor HVAC units (like air conditioners and heat pumps) are built to withstand snow, ice, and cold Iowa temperatures. Covering them traps moisture, encourages rust, and provides a cozy nesting spot for rodents.
If you have a heat pump:
Never cover it! Heat pumps operate year-round, even in winter. Blocking airflow can cause serious system damage.
If you’re concerned about falling debris, place a piece of plywood on top (not plastic or tarps that wrap the sides).
The Bottom Line: Knowledge Keeps You Warm (and Saves You Money)
True energy efficiency comes from understanding how your heating system works, not from outdated advice. A well-maintained furnace, clean filters, and balanced airflow are the real keys to comfort and lower utility costs.
Before the next cold front hits Des Moines, make sure your HVAC system is ready for the challenge.
Is Your Furnace Ready for the Iowa Winter?
Don’t wait for the first subzero night to discover a problem. Aspen Aire Heating & Cooling offers a comprehensive Winter Furnace Safety & Efficiency Inspection for homeowners throughout Ankeny, Des Moines, Altoona, and Central Iowa.
- Prevent emergency repairs
- Improve indoor comfort
Lower your monthly heating bills
Call Aspen Aire today at (515) 257-8370 or request service online to ensure your furnace is ready for the freeze.