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At Foss Heating & Cooling, we make our clients’ comfort and total satisfaction our top priorities. If you need any heating, air conditioning, indoor air quality or commercial HVAC services, give us a call. Our professional heating and air conditioning technicians in Mount Vernon, WA have the years of training and experience necessary to complete any HVAC service you need promptly and professionally. We believe that your comfort is far too important to take any chances with. Our comprehensive residential and commercial HVAC services are designed to protect your comfort all year long. Schedule service today.

The HVAC experts at Foss Heating & Cooling provides quality and comprehensive heating, air conditioning, indoor air quality, and gas piping services throughout Mount Vernon, WA and the surrounding areas. Call us today to schedule an appointment.

Dave was very personable and did a great job cleaning and servicing the equipment. He even have some helpful suggestions. Thank you Dave and thank you Foss.

- Richard L.

  • Puget Sound Energy
  • Cascade Natural Gas
  • Mount Vernon Chamber of Commerce
  • Angie's List
  • PUD
  • Energy Star

Serving Skagit County, Island County and Snohomish County since 1972


During the coldest time of the year, you need to be able to count on your heating system for a reliable, effective performance. The only way to be sure that your heater will operate properly and efficiently is to schedule your heating services with a professional company. Simply call the skilled heating technicians at Foss Heating & Cooling. Our heating installation service will ensure that your new heater is properly sized for your home and that it gets off to a great start. When problems develop with your heater, the HVAC technicians on our team will resolve the issue. We also offer great heating maintenance service to keep your system as dependable as possible.

Air Conditioning

When the cooling season arrives, will your air conditioner be ready? Without a professional air conditioning installation service, there is no way that you can expect to get the best performance that your air conditioner is capable of. No matter how you choose to cool your home, with a central air conditioner, heat pump, ductless mini splits or otherwise, Foss Heating & Cooling is the air conditioning company to trust with your air conditioning installation needs. Routine maintenance will keep your air conditioning system operating at peak performance levels, and our air conditioning technicians will ensure that any problems with your air conditioner are repaired skillfully. Call today to learn more about our air conditioning services available in Mount Vernon, WA.

Indoor Air Quality

When you take a breath inside your home, does your indoor air smell funny? Are you concerned about finding the right balance of humidity? Temperature is just one part of the equation. For true comfort in the home, you’ll need to think about indoor air quality as well. We can make sure that you have everything that you need with our range of UV lights, humidifiers, dehumidifiers and air cleaners. We also offer duct sealing, duct repair and duct testing.

Water Heaters

How efficient is your water heater? Do you ever run out of hot water before you’re done with your shower? Not only do we offer outstanding HVAC services throughout the Mount Vernon area, but we also provide our clients with comprehensive water heater services as well. From the installation of new tank and tankless systems to water heater repair and maintenance, we’re ready to get started.

Gas Piping

Whether you need a new gas line to power your oven or a replacement for your new gas water heater, we can make sure that your gas piping needs are taken care of properly at all times. We install, repair, replace, and inspect gas piping of all kinds, and we always make sure that our clients have safe and efficient fuel hookups. Contact our team today to get started!

Commercial HVAC

Maintaining comfortable temperatures in your commercial property can be challenging. Commercial HVAC heating and air conditioning equipment is under near constant strain. In order to get a great performance from your commercial HVAC equipment, you need to schedule exceptional services. The commercial HVAC specialists at Foss Heating & Cooling can be trusted to handle your commercial HVAC installation with the skill and expertise you deserve. By scheduling routine commercial HVAC maintenance service with us, you can help minimize the impact of general wear and tear on your equipment. Should something go wrong, our commercial HVAC repair team can handle the problem. Let us handle your commercial HVAC needs and know that you will receive quality service.

Call Us Today for Quality Heating and Air Conditioning Services in Mount Vernon, WA

Foss Heating & Cooling is here to answer any questions that you may have about your residential or commercial HVAC systems. Whatever you need to make your home or business more comfortable, out team of highly skilled, extensively trained HVAC technicians can handle the job. From heating installation to air conditioning repair, commercial HVAC maintenance and specialized indoor air quality services, we do it all. Contact us today to discuss the heating and air conditioning services available to you.