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 qualifying 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 reason we keep our customers for life 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

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!
I’ve used MM Comfort Systems for regular maintenance since purchasing my house two years ago. Recently, my furnace wasn’t working just in time for the temps to start dropping. Tor has been the one to service the furnace and he does a top notch job. Always explains what the issue is and how he can resolve it. They are reasonably priced for the level of service they give. Highly recommend.
Ashley Garcia
Ashley Garcia
02:40 31 Oct 20
I bought a furnace to replace an old inefficient system and they went the extra mile helping me decide what system would work best for me. My install was a little complicated and they went above and beyond to make sure it was done right. Now, a little over a year later they are still going above and beyond giving great service every time I call. I would recommend them to anyone looking for a good, honest HVAC shop.
Steve Proper
Steve Proper
17:43 30 Oct 20
This company was amazing. They communicated very well with me and even after hours. I had a scheduling conflict, and my salesperson answered the phone after hours while he was home with his family (I was expecting to leave a voicemail, not bother him). They explained every step of the way so I had no questions. When it came to installation time, Mikey & Randall were awesome. They had great personalities, and were very respectful. My wife is a police officer that works night shift, and they decided to do more outside work early in the day to not disturb her. They also were very sweet to our 2 dogs and cat. They took the time to not only greet us, but greet the animals. They explained everything to us prior to doing it, and ensured that we had no questions prior to leaving. They cleaned up after themselves so well that you couldn't even tell they were there.The next positive experience we had, was with Hannah. She was the person I spoke to over the phone after the service. She was very thorough in explaining the process after installation. She is assisting me in setting up the inspections to make things easier on me. She even was kind enough to register the warranty for my product so I didn't have to worry about figuring it out.I firmly believe that many companies can install AC units without a problem. What separates these companies from MM Comfort, is the customer service and positive interactions that I had with these employees. I would highly recommend this company, and will continue to utilize them for my service needs in the future.
Joe Palombi
Joe Palombi
01:13 23 Oct 20
Walter Chien-Jen Lin
Walter Chien-Jen Lin
23:52 21 Oct 20
Joe and Ross were terrific. They arrived on time, installed everything efficiently and even cleaned up. Wish all companies could hire workers like these two!
Sarah Finkenstaedt
Sarah Finkenstaedt
00:23 21 Oct 20
Somsanouk Phitsanoukane
Somsanouk Phitsanoukane
16:22 16 Oct 20
I asked Randy and Matt a lot of questions the day they installed our new Lennox furnace and AC unit. They were very knowledgeable and provided me with excellent details. They did a great job with the installation and their customer was superb.
Dale Edmonds
Dale Edmonds
20:48 15 Oct 20
MM Comfort did a splendid job. Installers Adam & Juan were professional and you can tell they love the job they do. Seeing the dedication of their staff I will highly recommend MM Comfort to anybody in need of AC unit. The Lennox unit that I got is very quiet and it works really well.
Krasimir Aleksandrov
Krasimir Aleksandrov
19:11 07 Oct 20
The entire process was better than smooth from the time I met with a consultant all the way through complete installation. Every contact at MM Comfort Systems are courteous, prompt, and helpful (sales, service, office, installation) - contactless, quick, convenient, over email paperwork and they even help me register the product.Zach & Tyrce did such a clean installation: the ducts look nice, as if already part of the house (did not stick out too much) and keeping the work areas clean after they pack up. One of my existing ducts wasn't optimize for air flow and the team went above and beyond to fix it while they were installing in the attic.Glad I found MM through Costco.
Eric Duong
Eric Duong
16:44 06 Oct 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.