4.6 
357 *The Angi rating for Heating And Air Conditioning Service companies in Union, 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 Union, 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 January 19, 2026
Serving Union, OH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2007
Free estimates
Emergency services offered
"Eco HVAC is just fantastic. The Tech, Scott Carter was just great. explained everything to me and was very professional. highly recommend Eco"
+22
Serving Union, OH and surrounding areas
Approved (Corporate)
In business since 1969
Free estimates
Emergency services offered
"They were highly efficient and professional. I would definitely recommend them for HVAC repair and installation."
+16
Serving Union, OH and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Very good service at a fair price. Service Manager Nick gave no pressure options for my situation. I elected for a new install which was performed within two days. Nick was very knowledgeable and responsive to my questions and concerns. Joe and Kaleb did an amazingly good job integrating the new furnace. Thrown together old systems now look like one streamlined unit. It doesn't just "work," it was put in with some craftmanship (HVAC art). Will definitely continue to use this company."
+47
Serving Union, OH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1978
Free estimates
Emergency services offered
"Hauserâ s sales manager and the field tech were both Very polite, knowledgeable and clearly communicated in as much technical detail as I wanted the repairs they recommended and why. Our previous HVAC service provider had diagnosed loss of AC cooling as a compressor failure and had quoted compressor replacement at over $3500 or even recommended replacing the matched AC & Evap Coil unit costing $5-$7K depending on the efficiency chosen. I approached Hauser for a second opinion diagnosis for loss of AC cooling and they diagnosed it as a deteriorating but not failed compressor and had it running in half an hour with a new replacement run capacitor and an add-on electrical gizmo â compressor saverâ at total cost of under $400."
Serving Union, 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 Union, OH and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"I had an issue with one of my tenants AC and found Living Comfort HVAC from HomeAdvisor. They were excellent, my property is in Springfield, Oh and they came from the Middletown area. They were punctual and fixed my issue. THANK YOU!!"
Serving Union, OH and surrounding areas
Approved
Free estimates
Credit card accepted
"Riley did a great job on a new gas furnace and air conditioner install. I was very impressed from start to finish. He was on time, professional and answered every one of my questions. My system was about 15 years old and I have had to put some money into over the years. I used several other companies during that time and none of them, I mean absolutely none of them, compared to the process I just went through with TrueTemp Heating and Cooling. Everything from the service call, to the consultation process and the installation of my new HVAC equipment was top notch. Can?t recommend this experience enough! Thanks TrueTemp!"
Serving Union, OH and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Our technician called to let me know he was running behind by about an hour. He was very apologetic and professional about the inconvenience. When he arrived he was very professional and got right to work. After servicing our unit and going over all the testing results with us, he made sure we fully understood everything and were comfortable with the results. He was great with our twin toddlers also, who were very interested in what he was doing. Even though it was late and we were his last stop of the day, he stayed and chatted with us and answered all our crazy HVAC questions that had nothing to do with what he was there to do. He was very knowledgeable about his field, was very friendly, and did a great job cleaning up our AC unit. It is running more efficiently now, and I'm sure we will see the results in our upcoming bills! It was an excellent experience and we will definitely use Wells for our future HVAC needs.
"
Serving Union, OH and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"Highly recommend Advanced Duct Cleaning. Very Professional & polite."
+119
Serving Union, OH and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
More Heat More Cool is a trusted local family-owned heating and cooling company proudly serving homeowners throughout the Greater Cincinnati and Dayton areas. We specialize in HVAC repair, air conditioning repair, furnace repair, AC installation, furnace replacement, heat pumps, ductless mini split systems, indoor air quality solutions, thermostat upgrades, ventilation, humidifiers, air purifiers, whole-home comfort systems, water heaters, and preventive HVAC maintenance. Our licensed and insured technicians are committed to honest recommendations, fast response times, and quality workmanship designed around your home’s comfort, efficiency, and budget. Whether you need emergency HVAC repair, seasonal AC tune-ups, heating maintenance, energy-efficient system upgrades, or a second opinion on replacement, we are here to help. At More Heat More Cool, we treat every customer like family while delivering reliable comfort, lower energy costs, healthier indoor air, and long-term home comfort.\n
+4
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