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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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!
Carlos and Carlos Jr. did a wonderful job for my new heat system (Lennox). Thank you for your hard work.
Kim Phan
Kim Phan
00:57 17 Jan 23
This company has far exceeded our expectations! Very professional! I highly recommend them! Thank you to the whole team!
K Cricket
K Cricket
20:50 15 Jan 23
We just had our indoor units hydrowashed. We have had the system for over ten years. The difference is amazing! Where we were using 3 and 4 for fan speed before the washing, We are now using 1 and 2 to maintain heated rooms. Glad you have the unit and glad we had it done. I am guessing having it done every few years as necessary as we have a dusty neighborhood.
George Wilson
George Wilson
20:38 11 Jan 23
MM Comfort Systems did an excellent job at a very fair price for the install of our heat pump. They were extremely communicative with all our questions. The installers Rus and Dallas did a great job removing our oil furnace and installing the new duct work. I would definitely recommend to anyone doing HVAC work.
Nick Ryan
Nick Ryan
15:30 10 Jan 23
They were on time, very polite, efficient, and friend. My installers Rus and Dallas went out of their way to be helpful in explaining the process to me.
Tracey Bagley
Tracey Bagley
23:53 05 Jan 23
Professional service. Timely. Good install done by Rus and Dallas
Pankaj Jain
Pankaj Jain
02:51 14 Dec 22
We are so pleased with the prompt and professional service that MMComfortSystems provided. Lili, the Service Manager was extremely responsive to our broken heater problem. She made sure that she had the correct part in stock so that the repairman could bring it to our home. And he showed up within the hour!Will certainly use MMComfortSystems again!
Virginia Follett
Virginia Follett
22:35 11 Dec 22
Most recently, John and Manny completed installation of our replacement furnace and did so in a thorough, professional, and timely manner.
John Hale
John Hale
18:44 06 Dec 22
MM Comfort Systems installed a Mitsubishi ductless heat pump at my house recently. The house was originally built with hydronic heating, so the mini split is an addition and provides AC plus a second option for heating. Had a very good experience with MM. The salesman, Russel, was very professional. The installers, Sam and Antonio, did a really nice job on the install and the installation looks extremely tidy. I can't comment on the long term durability of the Mitsubishi at this point since I've only had it for a few weeks, but so far its performing very well.
Simon Hepburn
Simon Hepburn
03:49 05 Dec 22
Fast, friendly service! Figured out our furnace wasn’t working during the first cold snap of the year, they still got us in fast and had great communication!
Anna Shurts
Anna Shurts
20:55 11 Nov 22
Joe Neal
Joe Neal
23:18 04 Nov 22
better
Gonzales Norma
Gonzales Norma
06:41 07 Oct 22
We have used this company for close to 8 years. They installed our Mitsubishi mini splits and also maintain them. Everyone has been professional. Prices are discussed prior to them showing up. Pricing is good. Allen was our technician today. He has worked with this company close to 30 years. Super knowledgeable and trustworthy. I highly recommend this company.
Rachel Rovik
Rachel Rovik
18:35 04 Oct 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
Great!
Girley
Girley
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
Billy Reese
Billy Reese
02:03 02 Aug 22
Kelly Kjostad
Kelly Kjostad
20:44 21 Jul 22
Geoff and the team at Sullivan did a fantastic job replacing our aging HVAC system. We had a complex system and the team assessed our needs and designed a great solution for our 2 story home. I got 4 bids and the Sullivan bid was by far the best design. The other companies just wanted to replace our system with the same. Design was 100% Execution was 100% Thanks Geoff and team.
Allan Scozzafave
Allan Scozzafave
00:02 29 Jun 22
Cool guys I dealt with today. They seem laid back and down to earth. I had an interview with them earlier today. Hopefully we can work something out.
Shawn Chance
Shawn Chance
23:42 21 Apr 22
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Redmond, WA 98052

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