4.8 
101 *The Angi rating for Heating And Air Conditioning Service companies in Denver, PA 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 Denver, PA 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 June 26, 2026
Serving Denver, PA and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Fantastic. In and out in within 2 hours. Cost $15,000 less than another Angie's List HVAC service person quoted me."
+6
Serving Denver, PA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Project: Clean HVAC ducts. Arrived on time. Very professional. Even re-taped nearly all the joints in the main duct / trunk. I would use them again."
+190
Serving Denver, PA and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Super professional group of the most experienced techs around. I would highly recommend and count on them for all my home’s hvac needs."
+3
Serving Denver, PA and surrounding areas
Approved
Super Service Award Winner
In business since 1959
Free estimates
Emergency services offered
"The technician Adam couldn't have been more professional and helpful. He arrived on time and was very courteous. He quickly was able to assess the problem and repair it. I'd recommend One Hour Heating and Air Conditioning to anyone looking to install or repair their HVAC system."
+16
Serving Denver, PA and surrounding areas
Approved
In business since 2001
Warranties offered
Credit card accepted
"Installed new 3 zone heat pump Great job"
+8
Serving Denver, PA and surrounding areas
Approved
In business since 2024
Free estimates
Customers say: True professional
"Woke to a chilly home stemming from a heat-pump issue. Posted my repair service need on Angi and within minutes, received a text and phone call from HOFFMAN MECHANICAL, who was able to come out same day and got my Lennox unit up and running again at a fair cost for both parts and the weekend/after hours service call fee. I would use them again without hesitation, and I am happy to highly recommend this company!"
Serving Denver, PA and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"I have a service contract with Petro. They came out to fix a leak on my heater. Service person came out on time, fixed the problem and cleaned up so you would never know he was even there. Very pleasant experience all the way through."
Serving Denver, PA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"I hired Juan to mount a TV on the wall at my house. He was prompt and very nice! He also helped me to install a new router and get my devices connected. Highly recommended for excellent service!"
Serving Denver, PA and surrounding areas
Approved
In business since 1982
Emergency services offered
Warranties offered
"I can't say enough about the team at Old Skool HVAC. I learned of this organization from a close friend who had work done and recommended them. Frank is a great guy. On time, professional, knowledgeable, and his team is a reflection of this as well. They were always on time, on schedule, clean, and very personable. They finished our job a little early, and during the first heat wave just about week or two ago, our house never felt better. Great service, quality, and pricing. It's funny, with central AC, you never really know that it's hot out until you leave the house and come home. It's during this first transition that I realized how quiet and effective of a system that was installed. If you are looking for any form of HVAC work in your home of business, I'd recommend contacting this group of professionals."
Serving Denver, PA and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"They did a wonderful job cleaning our air dusts. They explained everthing and weee very professional and courteous. Would use them again as needed"
+3
From average costs to expert advice, get all the answers you need to get your job done.
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.
Learn how to save money on air conditioning costs this summer by following this handy guide all about your favorite cooling system.
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.
Air-source heat pumps are an energy-efficient way to heat and cool your home. Learn the pros and cons of this heating method.
Retrofitting your house for AC is, surprisingly, not too hard. Here’s what you’ll need to consider to make it happen.
