Heating FAQ

MMT Heating & Cooling is your local Bryant Factory Authorized Dealer and the leading authorized Central Boiler dealer in the Duluth Metro. Our heating experts know how to maximize your heating benefits and help you save on your utility bill. Check out our most frequently asked questions for helpful tips and information on heating. Don’t see your question? Contact MMT today for answers to all your questions and concerns. Our heating contractors are here to help!


Is it a good idea to seal heating registers in my home?

We recommend leaving all your vents and registers open. Closing off registers to rooms you don’t use often causes your furnace system to release air unevenly and overwork itself as a result. By leaving registers open, air flow is allowed to evenly and efficiently heat your house.

How often do I need to replace my furnace filters?

Changing your furnace filter once a year during your annual tune-up is ideal, especially if your home does not have many air quality concerns. If you smoke indoors or have pets or allergies, we recommend changing your filter every six months to maintain cleaner air quality.

Bryant filters are more efficient than the selection at your local hardware store and MMT can help you find a filter for your system that will maximize your furnace’s cycling and airflow. Upgrade to a filter with a high AFUE (Annual Fuel Utilization Efficiency) rating to save money on your utility costs.

Should I purchase a furnace or boiler with a larger capacity for added heating comfort?

Having a larger furnace or boiler installed in your home doesn’t mean your heating comfort will be any better. An oversized unit in your home won’t cycle properly, causing inefficient operation, more out-of-pocket costs and a shortened life cycle for your heating system.

Can an outdoor wood furnace be installed with my heating system?

An outdoor wood furnace can be easily integrated with any existing heating system. Whether you have a furnace or a boiler, MMT can design and install an outdoor wood furnace on your property to make your heating more cost-effective and energy-efficient. Our Duluth customers burn 30-50% less wood with a Central Boiler outdoor wood furnace, helping them save money and lower their carbon footprint.

How long will my furnace or boiler last?

Depending on the system, the average lifespan for both furnaces and boilers is about 15 years. As your heating system ages, it naturally loses efficiency, resulting in higher energy bills. Your system’s lifespan can be extended with routine maintenance from our experts at MMT Heating & Cooling. Keep up with maintenance checkups and plan ahead for a new system before your heat goes out in the middle of a Duluth winter!

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