Heating & Cooling Systems

Determining the best type of system for your home depends on geographical location, the size and physical characteristics of your home, and the way the system will be used.

HVAC System Types

Split Systems

A split system is the most common type of heating and cooling. The furnace, which is indoors, is used as the heat source, while the air conditioning unit is outdoors and functions to cool the home. This type of system consistently and reliably heats and cools your entire home, as well as maintains indoor air quality through the use of filters inside the furnace.
Carrier_Outdoor_Unit
systems
hybrid system
hybrid system

Hybrid Systems

A hybrid system consisting of a heat pump provides both heating and cooling but with greater efficiency. This system is normally paired with a gas furnace or an electric air handler. A Heat Pump works just like an air conditioner to cool your home, which is by moving heat from inside the home to outdoors. A heat pump, however, has a reversing valve that allows it to absorb heat energy from outside air (yes, even in cold temperatures) and sends it indoors, thus supporting the heating effort for the home as well. When the weather is extra cold, the gas furnace becomes the primary heat source to ensure maximum comfort is maintained. It’s a solution that saves both energy and fuel.

Ductless Systems

Ductless systems enable you to heat and/or cool your home without invasive ductwork. They also operate quietly, have a compact design, and require minimal installation. Both Heat Pump and A/C solutions are flexible, whether you’re looking to maintain comfort in one room or multiple rooms.
Are you suffering from a hot or cold spot in your home?
Are you renovating your home?
Do you want air conditioning but can’t add duct work?
Ductless systems deliver cooling and/or heating to specific, targeted areas within the home. The installation is less invasive and can even be less expensive since these systems don’t require ductwork to distribute air. Ductless systems have an outdoor unit connected through a small hole to a compact wall-mounted unit indoors. Each indoor unit is designed to provide warm or cool air solely for the room in which it is installed. The indoor unit can be installed on a wall, in the ceiling, or on the floor. Ductless systems can be used for only one or two rooms, but they can also be expanded to make up to 8 separate climate zones in your home.
residential heating and cooling
residential heating and cooling
Air Conditioning
These flexible systems deliver targeted comfort in the indoor areas they’re placed. They also act as a zoning system by offering individual temperature control over each separate room. For example, if you want a cooler home office but a warmer bedroom, you can install a ductless unit in each room. This allows you to set different temperatures in each area depending on your comfort needs. A wireless remote makes this even easier. Not only are these units generally very energy efficient, but they also give you a much more refined level of control than you would have with a traditional duct-based system.

Heating and cooling systems come in Single-Stage, Two-Stage, and Multi-Stage options representing the levels at which they operate.

A Single stage unit means its operating speed is either on or off.
A Two-stage unit means it operates on either high or low. The low setting is adequate to meet most household comfort demands about 80% of the time, providing even temperatures. On hotter days, it can leverage the high level of operation to maintain comfort levels. Two stage systems are typically quieter and more efficient than a single stage unit.
A Multi-stage unit has a range of operation and therefore the most precise temperature control and best comfort. These variable speed units are the quietest and offer the most energy savings.

With an HVAC system, one size does not fit all. It is important to consider:

Cooling & Heating Capacity
Energy Efficiency
Air Quality
Humidity Regulation
Installation Requirements Unique to Your Home

Your Comfort Consultant will explain what these terms mean and help you identify which equipment will best suit your needs.

Air Conditioning Installation

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Why Choose Home Comfort Alliance?

Your Comfort is Our Promise
We promise the comfort of dependable heating, air conditioning, plumbing, and electrical services.
We promise you will feel comfortable with the people working in your home because they're knowledgeable, respectful, trustworthy, and tidy.
We promise the comfort of being offered options to help you find the right solution, at the right price.
We promise outstanding communication, service, and follow-up, so you're comfortable now and for years to come.
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It's a promise we've kept wtih thousands of homeowners across Western Washington

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Read our real customer reviews below!
I called at least 4 plumbing firms to get a leak in a hot water line by our hot water tank repaired. All were out at least a week before they could even come by for an estimate, and one quoted $1100 without even diagnosing the issue. Then called Greg at MM and he took immediate interest and FaceTimed me to further diagnose the issue. He gave me an approximate estimate and said he would try to get someone out that afternoon. Josh then did come to do the repair the same day (!) and suffice to say it was so reasonable I was pleasantly surprised, something I’ve never said before about a plumbing repair. I will be calling MM again for any plumbing or electrical needs.
Neil Maris
Neil Maris
03:10 20 Sep 22
M&M does pretty much all our HVAC, plumbing, and electrical work. They’ve installed a new furnace, a new water heater, water pressure booster pump and other plumbing, and most recently ran new wiring for overhead lighting in two rooms. We’ve always had great experiences and this time was no exception. Jacob and Jacob were efficient and professional and very pleasant to work with. Highly recommend M&M for all systems work.
Tim Braun
Tim Braun
07:09 10 Sep 22
Maria and her team did a fantastic job of replacing our hvac duct work. They showed up on time and we’re very respectful of our home. They cleaned up their work so well, you would never have known they were there. I will recommend them to all my friends and family.
Laura DeSantis
Laura DeSantis
10:32 04 Sep 22
Drew and Jason were on time, very knowledgeable, professional and communicative. I knew what to expect and they did what they said they would do. I loved the system the company uses to confirm appointments and when their technicians will arrive. Very nice! I highly recommend this business!
Janice Cherin
Janice Cherin
17:31 25 Aug 22
The people at MM Comfort are great, always informing of the installation time and date, installers Zach & Jeremy did a fantastic job removing the old system and installing the new furnace/ AC unit, would highly recommend.
William
William
14:54 25 Aug 22
Worked with them through Costco for furnace replacement and AC install. Estimate and installation process was very clear. Some things had to be modified at install time, but they were upfront and informative about why. System is working great and Sam and Antonio were awesome.
Jeremy Bradshaw
Jeremy Bradshaw
17:30 24 Aug 22
Installation is smooth and Luis & Mario, the technician are very professional on their job. Justin, the electrical technician, is also very nice. They came on time, finish the job quickly and clean up all the area after the service. He also went through their work with me after they finish the work. All work looks very solid. Glad I finally have the AC at my house.
Lingqian X
Lingqian X
23:11 18 Aug 22
I connected with MM Comfort Systems through Costco. My installers Luis and Mario were excellent and very knowledgeable. Everything was done on time and very professionally. They let me stick with them through all the work and it was very enlightening. While observing all the work being done, I realized what a great value I was getting for my dollar. The equipment is of high quality and fully functioning right out of the boxes!
Bruce Wyatt
Bruce Wyatt
21:19 17 Aug 22
MMComfort Systems was the third bid that we received. It took the longest to schedule, but it was definitely worth it to get a top of the line HVAC system professionally installed at a reasonable price. Ruslan and Dallas did an outstanding job installing the furnace and AC! Our dog even liked them! I especially appreciated the time Rus took to answer my questions and walk me through the new system. I also appreciated that MM Comfort was able to schedule the installation, the electricians and the duct cleaning all in 3 days. My wife and I are very happy!
L Marckx
L Marckx
20:47 17 Aug 22
Zach & Jeremy came in to replace a furnace and install a new heat pump. We went with the Carrier Infinity system and they did a really professional job with the installation. They were prompt, on time and courteous. They did a good job and everything passed inspection without any issues. Plan on using MM Comfort Systems for all our HVAC repairs and maintenance.
Great!
Gayle Detweiler
Gayle Detweiler
20:52 08 Aug 22
Really pleased with my experience. Installation was timely, the staff were knowledgeable and our AC works great. Pricing was transparent and reasonable for what we get. Not sure what else you can ask for.
Alex Hogan
Alex Hogan
16:27 08 Aug 22
The mini split system we purchased works great! I have lived in this house for over 40 years and expected the system to be good, but this is fantasic! We purchased through Costco and got a great price. The installers Mikel and Ina were efficient and friendly. They left the areas where they worked completely cleaned up! I highly recommend MM Comfort Systems!!
Mona Wiles
Mona Wiles
15:26 08 Aug 22
We had A/C installed on one of the hottest days so far of the summer. The installation team worked so hard in the heat and did an amazing job. Great experience all around. Thank you!
Anna Bisch
Anna Bisch
05:16 08 Aug 22
We ordered our mini-split duct a/c system from Costco, who used MM Comfort Systems as the provider. MM did a great job, especially our two installers, Matt and Alex, along with Jennah and Hannah in the office. thanks.
Hugh Lawrence
Hugh Lawrence
19:37 07 Aug 22
Sam and Antonio did a great job with our installation. They answered all of our questions patiently and finished the job without any issues. I highly recommend them and MM Comfort Systems.
Abhishek Uppalapati
Abhishek Uppalapati
16:35 04 Aug 22
Billy Reese
Billy Reese
02:03 02 Aug 22
This is the second time I've hired MM Comfort Systems, first time was through costco, 2nd time I reached out directly. They replaced an old furnace and installed a new AC. They were professional and on time. When they got here they looked through various parts of the ceiling and wall to determine a least intrusive way to route the AC coolant lines. Their patchwork was also well done aesthetically. They installed the components and AC was up and running within 8 hours. Drew and Jason did a great job with the unit, I have already recommended MM Comfort Systems to some neighbors.
Drake Hei
Drake Hei
23:18 28 Jul 22
Kelly Kjostad
Kelly Kjostad
20:44 21 Jul 22
Family owned they've been taking care of us for 20 years
Tracy Sharpe
Tracy Sharpe
03:22 01 Jul 22
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Redmond, WA 98052

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