Seattle-Bellevue-Tacoma Furnace, Heat Pump, AC, Ductless Pros

How can we help you?

Comfort and efficiency from friendly HVAC experts you can trust.

We are specialists in design, installation and service of heating, air conditioning and indoor air/water quality systems. We have the expertise required to meet today's need for comfort, efficiency and a healthy living environment. 

MM Comfort Systems
Furnace, AC, Heat Pump

Service & Repair

Heating and Air Conditioning maintenance to keep your systems safe & efficient. Reliable repair when you need it - 24x7. Expert service in all brands.

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Furnace, AC, Heat Pump


Full range of installed heating, air conditioning and air quality systems: furnace, heat pump, AC, hybrid, ductless, radiant, geothermal, water heaters, etc.

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Furnace, AC, Heat Pump


Friendly, expert consultation is available by appointment. Consultative approach includes inspection, heat loss calculation and written options.

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Utility INSTANT Rebates Available Now!!

Seattle City Light & PSE now offering rebates on heat pumps duct sealing, & more...

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Planned Maintenance Assurance (PMA) Offers

New customers can take advantage of our special offer, & more...

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The Air Conditioning & Heating experts for Seattle, Bellevue, Tacoma and Redmond

Professional Assessments conducted by qualified experts. We have BPI certified Home Performance consultants and auditors. 

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"Install crew was FANTASTIC! We really appreciated their knowledge and service."

Daniel - Seattle, WA

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"Great job by all involved - thank you!"

Bill & Denise - Sammamish, WA

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"Joe and his crew did a great job installing our new air conditioning and Mike our service technician always takes care of us. Thank you."

Jay - Mercer Island, WA

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Seattle's Heating, Furnace, AC & Heat Pump Experts

Seattle - Bellevue - Redmond - Tacoma Experts in HVAC Systems for Furnace Heating, Air Conditioning, Duct Cleaning, Ductless Heat Pump Installations, & Energy Efficiency

Heating and Air Conditioning maintenance to keep your systems safe & efficient. Expert service in all brands. Much more than the Seattle area’s best heating and cooling company, we focus on the total performance of your home or office building. MM Comfort Systems helps you understand options to audit, maintain, repair or replace your aging HVAC systems including furnace heating repair, air conditioning, air duct cleaning or repairs, new heat pump, or new water heater insulations. Serving Seattle, Bellevue, Redmond, Tacoma and surrounding areas since 1977.

About Us
Sep 24
How To Spot Mold And Control It In Washington State

Mold, although it makes us shudder in disgust, can be a real problem in Washington State and throughout the Puget Sound region. According to the Environmental Protection Agency (EPA),... Continue Reading

Aug 28
Does Size Matter When It Comes To Your HVAC System?

If you are purchasing a new air conditioner (AC) or upgrading your old unit, it's important that you choose an appropriately sized system for your home. A system that is too small or too... Continue Reading

Jul 21

Here's what a smart thermostat can do for you, and how to determine whether you really need one. Continue Reading