4.2 
61 *The Angi rating for Heating And Air Conditioning Service companies in Union, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Union, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on October 14, 2026
Serving Union, WA and surrounding areas
Approved
In business since 1986
Free estimates
Emergency services offered
"Airmasters is a truly professional company. we are very satisfied and will continue to use them in the future."
+46
Serving Union, WA and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"Received 4 quotes. Cummings was the least expensive that I used to bargain two others to. They matched but had install dates of 30 days. Cummings had their electricians and HVAC guys here in 8 days. Installation done in 4 hours. All had good customer service & tech skills."
+1
Serving Union, WA and surrounding areas
Approved
Super Service Award Winner
In business since 2013
Emergency services offered
Warranties offered
"Spencer was great! He thoroughly explained the issue with my electric panel and was able to fix it the same day. I'm glad I went with Hart's and would use them again for my electric, plumbing, hvac needs."
+334
Serving Union, WA and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!\n
Serving Union, WA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Cleaning was done perfectly and all my questions were answered about the service performed. We will definitely use this company in the future and we will recommend to family and friends for any duct work."
Serving Union, WA and surrounding areas
Approved
In business since 1995
Free estimates
Credit card accepted
"Replaced old duct that wasn't suitable or up to code, he was very knowledgeable about this."
Serving Union, WA and surrounding areas
Approved (Corporate)
In business since 1993
Free estimates
Emergency services offered
"High quality of service I have used Black Hills to service my HVAC for a while now and would recommend them"
+12
Serving Union, WA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"They are absolutely freaking awesome! They came back after I had missed him in the morning with no problem and no additional fee. They found the problem quickly solved it quickly and charged me hardly nothing for the service it was absolutely perfect I paid $100 for everything that they did! And the service guy was on top of it and very very polite they are now my one and only furnace service company"
+22
Serving Union, WA and surrounding areas
Approved
In business since 2022
Credit card accepted
Customers say: True professional
"Great company and service. Overall work and attention to service went beyond expectations. I recommend Alex and Evergreen Air for any A/C, HVAC project."
Serving Union, WA and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
"Because of their personnel; exceptional competence, efficiency, and attention to detail, every installation and repair was completed to the highest standards. They provided prompt service, transparent communication, and reasonable prices. Alpina Mechanical was a dependable option for HVAC needs because they continuously provided dependable and high-quality service, regardless of the nature of the work from routine maintenance to emergency repairs."
From average costs to expert advice, get all the answers you need to get your job done.
Planning to upgrade your air conditioner in the City of Roses? Before contacting a pro, learn about AC replacement costs in Portland, Oregon.
With a mild year-round climate, the PNW offers an optimal setting for a heat pump. Find out the factors that influence heat pump costs in Portland, Oregon.
Find out the average geothermal heating and cooling installation cost in Portland, OR. Learn what you can expect to pay for a new energy-efficient system.
A central air system is great for someone looking to cool and heat their home all year round. Even if your home uses baseboard heating, you can still make the switch. Read on to learn more about adding central air to a baseboard-heated house.
Try these 12 top tips to keep your air conditioner working at maximum efficiency. Stay cool, and minimize energy costs with this expert air conditioning advice.
Is it time for a new cooling system for your home? Check out this guide to get a head-to-head comparison of heat pump vs. air conditioner systems.
