Who We Are

All Phase Heating and Air Conditioning offers residential and light commercial service, installation and sales of high quality air conditioning and heating systems. Whether you need a new system installation, or a change out of an existing air conditioning system or furnace, our fully insured and industry trained technicians strive on making you comfortable and satisfied with your comfort system.

Our staff has the experience and knowledge to do the job right the first time. With over 30 years of experience serving the Pacific Northwest, we are confident and capable of taking care of all your needs when it comes to home comfort systems.



All Phase Heating & Air Conditioning has over 25 years of experience keeping Northwest Washington warm. Take a look at how we can take care of you.


All Phase Heating & Air Conditioning has been keeping Northwest Washington cool since 2014. Residential or commercial, All Phase has the skills and experience to keep you cool.

Hearth Products

All Phase Heating & Air Conditioning offers only the highest quality Hearth Products to our residential and commercial clients here in Northwest Washington.

Personalize your financing options!

Satisfied Customers!

Jon came to do a furnace service and diagnose/repair our heat pump. Everything was done in a very professional manner and we are very pleased with the work.

Joshua T.

All Phase Heating and AC did both my HVAC and my Heat Pump at my home here in Mount Vernon, WA. We have been very happy with not only the products but the service provided by Jon and his crew. I highly recommend All Phase for any sort of heating, AC or HVAC needs here in the Valley!

David J.

I called because my furnace stopped working, just as it did last year at this time. I called a well-known large company last year and spent 15-30 minutes, followed by many phone calls, trying to upsell me on insurance. and additional services (to the tune of $2000). It put me off, so this time I tried All Phase Heating and AC. WOW… What a difference. Joe came out within 30 minutes of my call and spent his time fixing the problem showing me where it stemmed from. He changed the very dirty air filter and told me to do so every 2 months when using the furnace. None of this was told to me last time around and I can’t even express how grateful I was for the info. He was thorough and informative without any up-sale. He was very friendly and competent. I love this company and will highly recommend them to everybody!

Sandy V.

Proudly servicing Skagit, Island, Whatcom and Snohomish Counties

With all residential and commercial heating and cooling product and service needs since 2014!