Providing Comfort For Over 40 Years

Your Heating & Cooling Experts.
Proudly Serving King, Pierce, and Snohomish Counties!

Service & Maintenance

Keep your system safe and efficient through maintenance:

24/7 Emergency Service
Service ALL Brands & Equipment
Duct Cleaning


Find a full range of heating, cooling, and air quality systems including:


Meet with our friendly, expert consultants available by appointment:

Heat Loss Calculation
Home Comfort Assessment
Written Options

The heating & air conditioning experts for Seattle, Bellevue, Tacoma, Redmond, and greater Puget Sound area!

Professional maintenance is essential to keeping your home comfort system operating safely and efficiently. To this end, we offer several services to improve the life and quality of your heating and air conditioning equipment.
Check to see if we service your area!

COVID-19 Update: Our staff has participated in Covid-19 Safety & Health Awareness training by the National Institute of Environmental Health Sciences. We are taking recommended precautionary measures for the safety of our employees and customers. #WeGotThisSeattle
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Save up to $2000!

Instant Savings on new heating and cooling systems!

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Save on Generators!

$500-$1000 instant rebates on automatic standby generators

Why Choose MM Comfort Systems?

The qualities that bring customers to us and keep them returning year after year is because of the way we conduct our business.
Keeping people comfortable in their homes since 1977
Experts in all facets of HVAC: design, installation & service
NATE Certified Technicians and ongoing industry standard training
Background screened and drug tested employees
Shoe coverings, dropcloths and clean jobsites
Quality installations that exceed industry standards
Proven HVAC products from industry leaders
5 year labor warranty on all new equipment
Employees empowered to do the right thing
Review ratings that lead the industry
Follow up calls after every install
We do all we can to discover and deliver on your expectations
Summer Is Here, Stay Comfortable All Summer Long. Schedule Now!

Our Accreditations

ACCA Quality Assurance Accredited
Snohomish Registered Trade Ally
Snohomish County
North American Technician Excellence Certified
NATE award
Accreditated Business
MM Comfort Systems BBB Business Review
A Rating Angie's List
Angie's List
Read our real customer reviews below!
Would recommend to anyone.
Richard Duckworth
Richard Duckworth
22:51 18 Sep 20
I installed the heat pump system with MM. They have the best price and their service is great. Mikel and Ina installed the system for us. They are very nice people and they change shoes when they get into the house, and they wear masks throughout the whole process. Hannah at the office is super helpful in getting the permits and helping me understand the whole process. It is a pleasant experience.
Liping Yu
Liping Yu
18:55 18 Sep 20
A very positive experience. Everyone from scheduler, installers and the original quote were professional and a pleasure to work with.
Christine Plaskett
Christine Plaskett
20:40 16 Sep 20
Allen was awesome! He showed up early, he was friendly, efficient, and super thorough. The job wasn’t exactly as he expected, but he adapted with a smile. I wasn’t home when he completed the job, so he sent a text with pictures and a detailed explanation of everything he did, with some additional user instructions. Really appreciated that! I would absolutely recommend MMCS to neighbors and friends.
Adam Harris
Adam Harris
23:41 14 Sep 20
MM Comfort handled replacement of an existing furnace with a Lennox furnace. This was done through the Costco program. The whole process was very professional. The install was particularly good. Carpet was cut around the previous furnace and the installers, Mike and Randall, did a great job of building in the new furnace to match with the flooring. My house was cleaner after they left. There was no rush. They answered questions, explained everything. All docs were handled. I am a critical reviewer and I can't think of improvements. They even had the city inspector out the next morning. It was a great experience. Thanks MM. I would happily recommend you.
18:14 14 Sep 20
We installed a new furnace and heat pump. The team was prompt, courteous, fast, informative and professional. They answered all our questions, were quick to explain any issues that popped up, and kept our home clean through the process. They did a great job!
Mary McNair
Mary McNair
18:09 14 Sep 20
Vitalii came out this morning and did an excellent job maintaining my AC system. He cleaned the filthy condenser coils (extra service which he priced and I approved beforehand), checked out the AC system's operations (wearing shoe covers when he came inside to check the temperature of the vent airflow), and he cleared a blockage in the condensation drainage pipe. It wasn't cheap, but I don't know what others charge for the same services, so I can't judge the value. All I know is Vitalii arrived on time, did the job professionally and quickly, and couldn't have been nicer, and that's an "A" in my book. 🙂
Bruce Ryan
Bruce Ryan
20:07 10 Sep 20
Sam & Mark replaced my furnace in 4 hours. Their ability to handle this quickly and without asking many questions allowed me to continue being productive while working from home. As a bonus they kindly let me know about a leak happening nearby and outside their work area which allowed me to minimize water damage.
John Mrozek
John Mrozek
16:18 05 Sep 20
We had a Lennox furnace installed by MM Comfort Systems on Monday. We bought the service through Costco. The installation was scheduled really fast and they actually gave us an even earlier date since they got a cancellation. Sam and Mark showed up in the morning at 7:30 am sharp. They worked hard and installed also the thermostat. After installing the furnace Sam showed us how the thermostat worked and before leaving they cleaned up after themselves. The only thing that we wondered a bit about was the filter unit that was already there - they replaced the filter, but with a too small one! We ended up replacing it with one of our own. Otherwise, the service was great and fast and we were pleased with the result.
Anita Christensen
Anita Christensen
23:22 02 Sep 20
I used MM Comfort a number of times. Rod, Sherry, Shirley, Hannah, Zach, Sam and others did a nice job I highly recommend this excellent company for HVAC and heating.
Seyed Mottaghi
Seyed Mottaghi
22:04 02 Sep 20
Great job really nice and friendly
Kenny Li
Kenny Li
18:33 13 Aug 20
Installed a heat pump with MM Comfort Systems for central air in the summer and significant heat savings in the winter (we estimate over $1500 a winter in propane savings). They were in an out in a day unobtrusive, professional, gave me great options and far better equipment for the same price as other quotes I'd recieved. The system is working great, Travin and Kyo were great and even tolerated me doing some training with my dog around strangers! 100% recommended
Randall King
Randall King
19:25 15 Jul 20
I highly recommend MM Comfort Systems for their professionalism, great customer service, and quick response. Tom, who came out to give us a bid, answered all of our questions, and emails promptly. The installers, Drew and Lamont did a meticulous job with the install of our new furnace and AC unit. We had other bids, and this was the one we ultimately went with because of their knowledge, and quick responses.
Colleen Jensen
Colleen Jensen
18:38 27 Jun 20
We just had a new heater and air conditioner put in our home. MM Comfort Systems were fantastic! I got several bids, but there’s was the best by far. They were prompt with correspondence and the whole process was super fast. The estimator Rod Kippes was great and explained all of the options we had, teaching me about how the system worked and answering all of my questions. Install was beautiful and the installers Dan and Alex were so friendly and knowledgeable. They explained how to operate and maintain my furnace and taught me how to program my thermostat. I couldn’t be more happy with my new equipment and would recommend MM Comfort Systems to anyone needing heating and cooling in their home.
Rob Lane
Rob Lane
16:19 03 Jun 20
Zach and Randall came at a very challenging time for everyone (Everyone is currently self isolating at home) They were not only respectful of my home, but were very professional and were able to communicate and complete the job while maintaining a safe distance. They were on time and very efficient with their work. The system itself, while only a few hours old, really beats the window units I was using before. My only regret is not making the plunge sooner. Thanks MM!
Jonathan Saenz
Jonathan Saenz
21:24 29 Apr 20
I really like that they've incorporated virtual appointments and no contact service calls during a time like this. They've made maintaining our home's air systems super easy and are all very friendly.
Aileen Song
Aileen Song
21:01 22 Apr 20


Our Office

Office: M-F 8am - 5pm
Services: 24/7
9680 153rd Ave NE,
Redmond, WA 98052

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To our Customers and Employees,


We are reaching out to inform you that MM Comfort Systems is taking the spread of COVID-19 very seriously. We are fully operational to serve the comfort needs of our customers, and as we continue to provide service and installations throughout the greater Puget Sound area, we want to assure you that the well-being of our community is our top priority. Following recommendations from both the CDC and the Washington State Department of Health, we have taken and are continuing to take measures of precaution to ensure the safety and wellness of our customers and employees.

At our facilities


  • Employees have been instructed to adhere to CDC recommendations for sanitization and social- distancing.
  • Employees who have any cold or flu symptoms are required to stay at home until symptom free for at least 3 days or 7 days after symptom onset, whichever is longer.
  • Should an employee have exposure to someone who has a confirmed or suspected case of COVID-19, they are expected to remain home for 14 days for health monitoring.
  • Hand sanitizing stations have been setup throughout our facilities.
  • Frequency of sanitization in our facilities has been increased and cleaning crews are taking extra precautions throughout their regular deep cleans.
  • All in person team meetings and group functions have been cancelled for the time being.
  • Personnel who can perform their jobs from home are doing so.
  • We are limiting contact and practicing social-distancing with our vendors and other potential outside visitors.

In your home


  • Our field staff has been trained be mindful of sanitization in your home and they have been equipped with gloves, disinfectant and masks. Please be advised that they will likely arrive wearing their masks and gloves.
  • Although, our technicians will not arrive to your home wearing a mask, they will be happy to wear one at your request. It is standard practice for a technician to wear a mask if entering a crawl space or attic area.
  • Our technicians have been informed to respect social distancing in your home.
  • Our technicians have been instructed to follow these procedures:
  • Use gloves whenever possible.
  • Wipe down all equipment or thermostats at the completion of the job.
  • Frequently wipe down their tablet using disinfecting wipes.
  • Frequently wipe down the inside of their vehicle and frequently touched items with disinfecting wipes.
  • Our customers are no longer asked for signatures on tablets.

Please inform us in advance of your appointment if you or anyone in your household are showing any of the symptoms of the Coronavirus or have tested positive for the Coronavirus. The World Health Organization has identified symptoms as shortness of breath, fever, and persistent coug

h. We will work together to find a solution for the services you need while ensuring the safety of everyone involved.

Should we find that any changes to our scheduling is necessary during this time, we will let you know as soon as we know. We are continuously monitoring the COVID-19 situation and will take whatever measures are necessary to ensure the safety of you and our staff.