Most people never give their air conditioner a second thought, unless it stops working. However, there are some people who are just a little more curious than others. Have you ever wondered how your air conditioner works? If so, then continue reading to learn more about some of the basics of air conditioning.


Air conditioners use refrigeration to cool your indoor air. So how does it do it work? When a liquid converts to gas, it absorbs heat, which is called phase conversion. That’s the principle that air conditioners take advantage of. AC units use phase conversion by making specific chemical compounds to evaporate and then condense repeatedly all in an enclosed coil system.


AC units also have fans that move the warm air over the cold refrigerant coils. When that happens the refrigerant inside absorbs the heat as it changes from liquid to a gaseous state. To keep cooling properly, the AC unit must then covet that gas back into liquid, which it does by using a compressor. The compressor then pushes all of the unwanted heat back outdoors with the help of the condenser coils. It’s an amazing process.


If you are in need of air conditioning repair in Portland OR then contact Comfort Air today. We are also heating experts so if you are having any troubles with your furnace or other heating unit, then contact us online today or call us at 360-205-1817. We can service all of your heating and cooling needs in the Portland/Vancouver area.


5 Stars for these folks. Bradford came out on the nastiest day of the year and had us up and running again in short order. Knowledgeable, professional, fast and affordable. DO business with these folks !! You will not regret it.

-Ric K. Google Review

I was planning a heater upgrade and received a 24 month no interest offer from Home Depot. They sent me a list of contractors and Comfort Air was the only contractor that called me before I could call anyone else. The customer support, salesperson and installers were fast, competent and incredibly supportive. From the time that I contacted them until the heater was installed was fast and the new heater is a big improvement over what I had before. Highly recommend Comfort Air for fast, efficient and professional service. I feel comfortable that they will be responsive, should there ever be an issue with my new heater!

-Jolene N. Google Review

We would like to thank all of you at Comfort Air for the work you just completed on our home. We are particularly pleased that your company has both the equipment and training to diagnose the exact problem we were experiencing with indoor air quality. We are very pleased that with the remedy you suggested the problem is completely resolved. The installers were highly competent and a pleasure to have in our home.
Special thanks to Dmitriy for his work from beginning to end. He is surely a gem on your staff.

-Kyle H. Google Review

Bradford the technician has come to our home a couple times and is always professional. I especially appreciate the exceptional customer service in the office. Every time I call, no matter who answers the phone, they always help me and go out of their way to help me understand how to troubleshoot my thermostat/heat pump. Today, I needed to revise an appt time and Rosa called me twice today to make sure she set up the appt for a time that would work for me. Fabulous service!

-Mardi F. Google Review

Best experience!! Bradford was so polite and helpful. He really took pride in his work and did a great job on our fireplace. Will be calling Bradford again for help if needed! One of a kind worker!!

- Alexandra Call Google Review

Always very professional and the best value I have found. I asked for a courtesy text prior to arrival and they totally did. Definitely recommend Comfort Air

-Shae Rondeau Google Review

I've had a very positive experience with Comfort Air and Trane. The system was affordable, installed in one day and they have done great follow up! Thanks Johnny!

-Gary Thompson Google Review