10 Best HVAC Companies in Mercer Island, WA

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Last Updated: February 25, 2025

On average, 55% of the energy used in American homes is for heating and cooling, according to the U.S. Department of Energy. You don't want to spend more than necessary on temperature control in your Mercer Island home, so it's important to make sure all systems are working properly.

Our guide to the top HVAC companies in Mercer Island can help you save money by getting your HVAC system repaired, installed or replaced for a fair price by a skilled worker.

Top 10 Best HVAC Companies in Mercer Island

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CPI Plumbing & Heating

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1900 Railroad Ave, Mount Vernon, WA 98273 (360) 447-6675 cpiplumbing.com

Reliable customer support

Free quote

Clear pricing policy

Informative resources

Prompt service delivery

Services Offered

Emergency services
Maintenance
Boiler installation
Ductless
Ac installation
Inspection
Furnace repair
Ac repair
Indoor air quality
Filtration
Furnace installation

All Climate Heating & Air Conditioning

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14907 NE 95th St, Redmond, WA 98052 (425) 746-3077 allclimate.net

Clear pricing policy

Reliable customer support

Prompt service delivery

Services Offered

Ac installation
Inspection
Furnace repair
Maintenance
Radiant heating
Emergency services
Filtration
Boiler installation
Indoor air quality
Ductless
Duct cleaning
Furnace installation
Ac repair

Cool Heat 365

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26915 98th Dr NW, Stanwood, WA 98292 (425) 740-4212 coolheat365.com

Free quotes

Reliable customer support

Clear pricing policy

Informative resources

Prompt service delivery

Services Offered

Furnace installation
Indoor air quality
Emergency services
Filtration
Ac repair
Ventilation
Ac installation
Maintenance
Ductless
Inspection
Furnace repair

DVAC Services

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14911 Hwy 99, Lynnwood, WA 98087 (425) 585-4019 dvacheating.com

Reliable customer support

Prompt service delivery

Clear pricing policy

Informative resources

Services Offered

Indoor air quality
Ac repair
Radiant heating
Filtration
Inspection
Ventilation
Boiler installation
Emergency services
Maintenance
Ac installation
Ductless
Furnace installation

AAA Heating & Air Conditioning

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4150 Lind Ave SW, Renton, WA 98057 (253) 243-8556 aaaheatingac.com

Informative resources

Free quotes

Clear pricing policy

Prompt service delivery

Reliable customer support

Services Offered

Boiler installation
Maintenance
Ac installation
Emergency services
Furnace installation
Duct cleaning
Indoor air quality
Furnace repair
Ac repair
Ductless

Mercurio's Heating & Air Conditioning

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4001 S Union Ave, Tacoma, WA 98409 (253) 765-8638 mercurios.com

Reliable customer support

Clear pricing policy

Informative resources

Free quotes

Services Offered

Inspection
Furnace installation
Ductless
Ac repair
Ac installation
Maintenance
Duct cleaning
Furnace repair
Indoor air quality
Emergency services
Filtration

Pacific Heating & Cooling

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8607 Durango St SW STE A, Tacoma, WA 98499 (253) 286-0119 pacificheatingcooling.com

Free quotes

Reliable customer support

Prompt service delivery

Clear pricing policy

Informative resources

Services Offered

Furnace installation
Filtration
Ac repair
Maintenance
Emergency services
Furnace repair
Indoor air quality
Duct cleaning
Ac installation
Ductless

Washington Energy Services

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7009 45th St Ct E, Fife, WA 98424 (800) 398-4663 washingtonenergy.com

Reliable customer support

Free quotes

Prompt service delivery

Informative resources

Clear pricing policy

Services Offered

Filtration
Furnace repair
Furnace installation
Ductless
Maintenance
Duct cleaning
Emergency services
Ac installation

Cozy Heating Inc.

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20221 67th Ave NE, Arlington, WA 98223 (360) 435-4904 cozyheatinginc.com

Free quote

Clear pricing policy

Reliable customer support

Informative resources

Services Offered

Ventilation
Indoor air quality
Furnace installation
Ductless
Ac repair
Maintenance
Filtration
Radiant heating
Emergency services
Ac installation

Evergreen Home Heating and Energy

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User Rating

727 S Kenyon St Suite B, Seattle, WA 98108 (206) 565-1455 evergreenhomeheatingandenergy.com

Clear pricing policy

Reliable customer support

Prompt service delivery

Free quotes

Services Offered

Ductless
Emergency services
Furnace installation
Smart home integration
Ac repair
Furnace repair
Duct cleaning
Maintenance
Indoor air quality
Ac installation
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on hvac companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

Signs You May Need HVAC Repair or Replacement

An HVAC system that's malfunctioning or outdated likely needs professional attention for maintenance or replacement. Watch for these signs that your system needs service:

  • Temperature control issues or thermostat malfunctions
  • Strange noises when turning on
  • Higher than normal energy bills
  • Frequent breakdowns and need for repairs
  • Poor air circulation or uneven heating/cooling
  • Cracking, corrosion, or rust
  • Refrigerant leaks
  • An HVAC system that's over 15 years old

Arrange an inspection if you notice any of these problems. A local technician can evaluate your system, detect problems, and figure out whether you need repairs or a new HVAC unit.

Cost of HVAC Installation and Maintenance in Mercer Island

HVAC installation or maintenance costs change depending on your system. Common HVAC unit varieties include the following:

  • Split or mini-split: If your home lacks the right ductwork for central air or heating, you probably have a split HVAC system. Split or mini-split systems consist of indoor units that control the temperature in individual rooms. These interior units are all connected to an outdoor unit.
  • Hybrid split: A hybrid split HVAC unit operates similarly to a regular split system. It gives flexibility by providing the option to use either electricity or gas for energy.
  • Heat pump: Heat pumps circulate hot and cool air between your home and outside. They don't produce their own heat or AC, so they work best in temperate climates.
  • Packaged heating and air: Packaged HVAC systems are often a good option for smaller houses. These systems consist of a single combined heating and cooling unit that's usually located in an attic or basement. This unit tends to be efficient, compact, and easy to maintain.

The price of HVAC maintenance also depends on what kind of work being done. HVAC systems are complex and can require different kinds of maintenance. The prices of some common jobs are as follows:

HVAC Unit TypeCost
Split$2,063-$5,259
Hybrid Split$4,180-$7,701
Heat Pump$3,236-$32,978
Packaged Heating and Air$271-$451

Ways to Save Money on HVAC Costs

HVAC system repairs and replacements are important, but can be expensive. Luckily, homeowners can take steps to reduce wear and tear on their system and lower future maintenance needs.

  • Keep your system clean. Keeping your grills, indoor evaporator coil, condenser fan blades, and ductwork clean helps your system run and reduces the risk of mold growth. The National Air Duct Cleaners Association recommends that you clean your HVAC system when it starts to look dirty.
  • Change filters regularly. Air flows through your HVAC system most effectively when you change out or clean the filters every 1–3 months. Also try not to let debris pile up on the external sections of your HVAC.
  • Monitor for potential problems. Keeping a close eye on the efficiency of your HVAC system — for instance by checking your thermostat settings and energy bills — helps you find and solve issues before they get too expensive.
  • Change the position of your blinds seasonally. Leaving your blinds open during the colder months helps warm your home with passive solar heating. Closing the blinds during the summer helps prevent some heat from getting inside. Doing both helps lessen the demand on your HVAC system.
ServiceCost
Filter Replacement$68-$181
Condensor Cleaning$1,354-$4,062
Thermostat Repair$90-$226
Ductwork Cleaning$433-$1,083

How To Choose a Local HVAC Company

Knowing what to look for in an HVAC company is crucial for a successful project. Partnering with an experienced, licensed contractor can offer you peace of mind and ensure your system provides reliable heating and air conditioning for your home.

Compare Multiple Bids

Contact at least three HVAC companies for quotes. Describe the issues and have technicians visit to inspect your system if possible. Compare the providers' explanations, solutions, estimated costs, warranties, and timeframes. Avoid providers that pressure you or demand payment upfront.

Check Credentials

It's important to choose an HVAC company that employs technicians with the appropriate qualifications and expertise. HVAC contractors in all states have federal requirements set by the Environmental Protection Agency (EPA). To obtain the EPA Section 608 Technician Certification, individuals must pass an exam (the type of exam depends on what kind of equipment they intend to work with). Section 608 certification is required for all technicians who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." All other licensing requirements are handled at the state level.

HVAC contractors are required to be licensed as specialty contractors in the state of Washington. Individuals must hold a speciality HVAC license and may also require electrical or plumbing licensure depending on the nature of the job. Licensing is handled by the State Department of Labor and Industries, which mandates that contractors must be both bonded and insured. Checking reviews on Google Reviews, Yelp, the Better Business Bureau (BBB), and similar sites can assist your decision as well. Choose a company with stellar reviews and reports of positive experiences from customers.

Understand Work Details

Always make sure you know the details of your project. For HVAC repairs, your provider should specify which parts require replacement and why. Confirm that your technician will clean and test the full system after repairs are completed to verify that it’s working properly. When replacing your HVAC system, ask your installation company to provide details on the new energy efficiency, estimated installation time, brand, features, and model. Before work begins, make sure you understand the process your provider will use to select the correctly sized system for your home and what the cost will be.

Compare Warranties

A reputable HVAC company will back its repair services and installations with a warranty. The longer and more comprehensive the warranty coverage, the better. Carefully compare the fine print between contractors and choose the company that provides the greatest protection at a reasonable price.

Get Quote in Writing

Get a written quote before HVAC work begins. A full quote includes both labor and material costs. Make sure you understand and accept all terms before signing the contract.

Frequently Asked Questions About HVAC in Mercer Island, WA

You should have your HVAC system inspected twice yearly. After the inspection, your technician will tell you if any services are needed. You should also have your system inspected if you notice new issues such as unusual smells, leaks, or strange noises. If your home has ductwork, it should be inspected every few years.

Normally, it's smart to have your HVAC system inspected in the spring and fall, as technicians tend to be less busy at these times. This also helps make sure your system is prepared for the summer and winter, when it typically sees the most use.

You can save energy during the winter by reducing how much power your HVAC system uses to heat your home. Keep your thermostat as low as is comfortable and don't make drastic changes in the temperature — increase or decrease it a few degrees at a time. If you can, try switching to a smart thermostat.

It takes between one and three days to have an HVAC system installed or replaced. If you need just a furnace or a single air conditioning unit, this might take between half a day and two days. This timeline can be influenced by the size of your home, the accessibility of your system, and any new issues your technician uncovers.

For a 2,000-square-foot home, you should look for around 2.5 to 5 tons of air conditioning capacity. In Mercer Island, you can probably make do with a unit on the lower end of this range. For homes over 1,000 square feet, central air will usually be more effective than window units for cooling.

For a 2,000-square-foot home, you'll also look for a furnace that is between 50,000 and 80,000 BTUs (British thermal units).

Your HVAC company may offer financing options via a third-party lender, or you might be able to obtain your own loan. It's smart to discuss payment options with your HVAC company and a financial advisor to make sure that you find the best option for you.

There are several ways you can make your HVAC system more energy-efficient:

  • Keep ductwork clean, and change or clean your air filters on a regular basis.
  • Have regular inspections to take care of issues as they arise.
  • Make sure your doors and windows are well-sealed and keep your attic well-ventilated.
  • Install a smart thermostat. If you don't want to or can't buy one, try to keep the temperature indoors as close to the outside temperature as you can.
  • When it comes time to replace any part of your HVAC system, explore Energy Star-certified or other environmentally friendly options.

Other Mercer Island, WA Home Services

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