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
"Our HVAC Tech was quick and efficient and made sure our HVAC systems were ready for the summer."
+22
Serving Union, OH and surrounding areas
Approved (Corporate)
In business since 1969
Free estimates
Emergency services offered
"HVAC maintenance. Workers are very efficient, courteous and nice"
+16
Serving Union, OH and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Extreme Heating and Air Conditioning installed an 18 SEER HVAC system with zone control for me. I am very pleased with the results and performance of the system - far better than the previous system WRT air flow balance. All personnel were very knowledgeable and professional and I highly recommend this company. Thanks to Tristan, Brett, Ryan, Joe, Paul and special thanks to Dave and Tyler for working through some parts failures. I am very pleased."
+47
Serving Union, 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 Union, OH and surrounding areas
Approved
In business since 2023
Free estimates
Credit card accepted
"Scott was absolutely incredible from the first communication to the final steps in the process. My husband is in HVAC and was blown away by his knowledge and expertise. We have zero complaints and would recommend this company to anyone!"
+19
Serving Union, OH and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"Called with an emergency repair,Fast response, able to replace funaca next day.our go-to for HVAC from now on. Goodbye to "experts""
Serving Union, OH and surrounding areas
Approved
Free estimates
Credit card accepted
"I trusted the tech right away thanks to his transparent communication style and obvious wealth of experience and knowledge. Sure enough, the job was done right and he left everything cleaner than when he got here. If you need help with your HVAC system, you NEED to call TrueTemp. I’d highly recommend!"
Serving Union, OH and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"They were very good with initial response, estimate, and install date. The quality of the install was mediocre; attention to detail, not so much. They did not worry too much about cleanup after the job, several examples of that; I have un-removable black goo on my driveway. There was supposed to be a two week follow-up visit and I was going to address some of my questions and issues then but was scheduled twice and did not occur either time, no call no show the second time. I realize this all occurred during a peak time of year. The unit does work without difficulty and we are happy to have HVAC but I will probably go with another company for service and maintenance.
"
Serving Union, OH and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
Experience cleaner and healthier air in your home with Advanced Duct Cleaning. Our expert team specializes in air duct cleaning, ensuring your family's comfort and well-being. Trust us to remove dust, allergens, and pollutants, leaving your home fresh and safe. Contact us today for a breath of fresh air.
+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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