4.7 
1.1k+ *The Angi rating for Heating And Air Conditioning Service companies in Hamilton, OH 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 Hamilton, OH 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 March 15, 2026
Serving Hamilton, OH and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Eveeything went great and things were explained properly, will definitely use Chiily for any HVAC needs.
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+72
Serving Hamilton, OH and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"We got several quotes from local HVAC providers / installers. We felt the most comfortable with the salesman from Extreme One Hour Heating and Air Conditioning and I got the best price from them which also included a 2-year membership in their Comfort Club (Spring and Fall service visits to check and tune-up my system). We were an all electric home until a couple of years ago when we added natural gas. When our 16-year old Trane heat pump developed problems this proved an ideal time to switch over to a gas furnace and air conditioner. We stayed with Trane as we were happy with our Trane heat pump. Because we have some space constraints and limitations for our new system, Extreme sent out their system designer the day before the installation to develop a creative solution that met our requirements and efficiently maximized the space with which they had to work with minimum impacts to us. The day of the install they arrived on time, were friendly but very professional and treated our home as if it was their own. They also took the time to answer my questions while the worked. Since it was bitter cold that day, they needed to be in and out all day, and we were without a heating system most of the day, they brought a heavy duty space heater to keep us from freezing until they were done. At completion, showed us how to use the new system including the new programmable thermostat, changing filters, etc. and they cleaned up everything and left our home better than they found it. They then submitted all of our rebate paperwork to Vectren and DP&L for us. We were very impressed with the whole process of buying and installing a complete new HVAC system. I highly recommend Extreme One Hour Heating and Air Conditioning for and HVAC installation work!"
+47
Serving Hamilton, OH and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
"Tyler did a perfect job I have not had one issue with the installation. I will hire and recommend Tyler for all HVAC needs."
+12
Serving Hamilton, OH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1978
Free estimates
Emergency services offered
"Pretty good experience if you just install new HVAC. But, if it is full HVAC and duck replacement, you will need to ask during quote. Otherwise, you will have trouble."
Serving Hamilton, OH and surrounding areas
Approved
In business since 1969
Free estimates
Emergency services offered
"Travis Cloyd and his partner did a great job replacing our 15 year old HVAC system with a new Trane. They were on time, efficient, and neat as a pin. Looking forward to enjoying the comfort of the new system."
+2
Serving Hamilton, OH and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Ennis was very knowledgeable, professional, and trustworthy. I will be using him for any HVAC needs in the future."
+17
Serving Hamilton, OH and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Free estimates
Emergency services offered
"I appreciated the time Elliot took in explaining everything he was doing. I have already hired him to do the spring check up on our HVAC."
Serving Hamilton, OH and surrounding areas
Approved
In business since 2023
Free estimates
Credit card accepted
"This company is fantastic. I had a mess in a home we bought to rehab. These folks cleaned the ducts, but saved me $4,000+ dollars on various things they found that were serious issues, that were not related to the ducts. Even found a place where a previous installer for my water heater set me up for a fire. These folks are fantastic. $700 cleaning, $3300 saved!!!!"
+19
Serving Hamilton, OH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1954
Emergency services offered
Warranties offered
"We have used this company for years to maintain and install our HVAC Always professional and expedient"
Serving Hamilton, OH and surrounding areas
Approved
In business since 1928
Free estimates
Emergency services offered
"HVAC tune-up appointment went very well. Clean professional job. I would have them back again."
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