7 HVAC Tips Every NH & Southern Maine Homeowner Should Know

Your heating and cooling system is one of the most important (and expensive) systems in your home. With a little care, you can extend its life, save money on utilities, and avoid breakdowns at the worst possible time. At KMG Mechanical, we’ve put together these essential tips and tricks every homeowner should know to keep their HVAC system running strong.

1. Change Your Air Filters Regularly

Clogged filters make your system work harder, wasting energy and reducing comfort.

• Check filters every month during peak heating or cooling seasons.

• Replace them at least every 90 days, or more often if you have pets or allergies.

2. Keep Vents and Registers Clear

Furniture, rugs, or curtains blocking vents can cut airflow and stress your system.

• Make sure supply and return vents stay open and unobstructed.

• Vacuum vents periodically to reduce dust buildup.

3. Schedule Professional Tune Ups

Just like your car, HVAC systems need routine maintenance.

• Annual maintenance helps catch small issues before they become major breakdowns.

• For the best performance, schedule one heating tune up in the fall and one cooling tune up in the spring.

4. Watch Your Thermostat Settings

Constantly adjusting the thermostat makes your system cycle more often.

• Set a consistent temperature for comfort and efficiency.

• Consider a smart thermostat that learns your habits and helps lower utility costs.

5. Keep the Outdoor Unit Clean

Your outdoor condenser (for central AC or heat pumps) needs space to breathe.

• Clear leaves, grass, and debris at least two feet around the unit.

• Gently rinse coils with a garden hose once or twice a year never use a pressure washer.

6. Seal Air Leaks Around Your Home

Even the best HVAC system can’t keep up if your home is drafty.

• Seal gaps around windows, doors, and ductwork.

• Add insulation in attics and crawl spaces to reduce heat loss and save energy.

7. Don’t Ignore Warning Signs

Strange noises, weak airflow, or unusual smells can indicate a problem.

• Addressing issues early prevents costly repairs.

• If you notice anything unusual, call a licensed HVAC professional before it gets worse.

Bonus Tip: Consider an Upgrade

If your system is 15+ years old, it’s likely running at half the efficiency of modern units. Upgrading to a high efficiency system, such as a Samsung mini split, can cut utility bills significantly and qualify for rebates and tax credits.

Final Thoughts

A little maintenance goes a long way toward comfort, safety, and energy savings. Whether it’s changing filters, scheduling a tune up, or upgrading to a more efficient system, small steps add up to big results.

Need help with your HVAC system? Call KMG Mechanical at (603) 919-7929 or visit www.kmgmechanical.org to schedule your next service.