
Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Outstanding service and professional installation!!"





+6

*The Angi rating for Boiler Installation companies in Frederick, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation companies in Frederick, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
Last update on December 22, 2025

Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Outstanding service and professional installation!!"





+6

Serving Frederick, PA and surrounding areas
Approved
In business since 2013
Free estimates
Warranties offered
"They were quick and efficient, removing my old Boiler was no easy task but they did it was no issues. Super professional and left the place cleaner than it was before they got here. I will definitely use them for any future projects."

Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"It was a superb experience. From the visit by Bruce the sales representative to the installation day to the follow-up from Petro, every single person we interacted with was helpful and professional. When Bruce arrived to do the assessment, we spent time going over the heating needs in the house. After a thorough inspection and measurement of the house, we sat down. He showed me a few options, all of which were going to provide good service. I ordered a unit at the end of that meeting. The installation day was just terrific- the entire work crew that showed up were everything I would hope to find: Upbeat, informative, hard-working, focused. The job was finished before end of day as promised. The heater room is now immaculate, with new piping and a new heater. It was like watching a pit crew at a NASCAR race. Everyone had their tasks, they moved carefully but quickly. The materials were all laid out in order, etc. Just a totally professional approach to their work. The crew boss answered any questions I had. The follow-up for a normal inspection of the furnace chimney was scheduled the day after the installation. I’ve gotten calls to insure we are satisfied with the work. Satisfied barely covers it- I am pleased to write this kind of review. Without hesitation I will recommend Petro to friends and family throughout the Philly area. Peter A. Elkins Park"




Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1999
Free estimates
Emergency services offered
At Dilling: Heating, Cooling, Plumbing & Electrical, we provide HVAC, Plumbing, and Electrical repair, maintenance, and replacement services in the Charlotte Metro and surrounding areas. We are available to you 24 hours a day, seven days a week, and can respond to your home's service issues within 24 to 48 hours upon initial request. Give us a call today! Dilling Does It - Since 1955!

Serving Frederick, PA and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
Keystone Comfort HVAC was built to provide a better experience for homeowners in southeastern PA. After years of working within large, corporate-driven HVAC environments, our founders saw a growing need for a company that values honesty, quality work, and long-term relationships over quick transactions. We understand the common frustrations customers face, including unclear communication, rushed service, and short-term fixes that don't solve the real problem. We take the time to listen, explain what is happening, and provide clear recommendations tailored to your needs. Whether it is system repairs, new installations or maintenance, we focus on doing the job right the first time. We believe that when customers feel informed/confident in their decisions, the results are better. We also believe that strong teams create better outcomes. By supporting our employees and maintaining high standards in our work, we are able to deliver consistent service that customers rely on.





+6

Serving Frederick, PA and surrounding areas
Approved
Free estimates
Warranties offered
Credit card accepted
"I had a great experience with this HVAC company from start to finish. They were professional, punctual, and took the time to explain everything clearly. The technicians were knowledgeable, respectful of my home, and made sure the job was done right. Their pricing was fair, and the quality of their work exceeded my expectations. I highly recommend them to anyone looking for reliable and honest HVAC service. I will definitely be using them again in the future!"





+5

Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1989
Free estimates
Emergency services offered
Founded with creating a higher standard in the industry and providing superior customer service, Christian Heating, Cooling, Plumbing and Electrical has been serving the local community since 1989. At Christian, we take pride in employing service technicians who are well trained in their craft and dedicated to the satisfaction of our customers.\n\nFor 35 years, our team has kept your family safe & comfortable. Our expert technicians receive weekly training to ensure that they are up to date on the latest equipment and service practices in our industry. \n\nWe’re here for you 24/7 so don’t hesitate to contact us today.\n\n

Serving Frederick, PA and surrounding areas
In business since 1985
Free estimates
Credit card accepted
"I would HIGHLY recommend Green Heating and Cooling, giving them a 5-star rating! I have been using Green Heating and Cooling for several years and Dan is a professional who is reliable, knowledgeable, and responsive to all needs, especially emergencies. If you would like a dependable service for routine upkeep or for installation of new equipment I suggest you look no further!"


Serving Frederick, PA and surrounding areas
In business since 1994
Free estimates
Emergency services offered
"I had Indoor Air install a central AC unit and furnace at our rental property and a central AC unit at our residence in early 2016. First, I'm a bit obsessive about research and price quotes and spent many hours sitting with salespeople and getting quotes from seven different local providers: two small-scale, two mid-size and three large companies. The closest local competitor by staffing seemed to be Princeton Air. Indoor Air had such positive reviews on Angie's List, Yelp and Google that I asked Dennis how he was gaming the system, and he claimed that they had no dedicated staff for optimizing online reviews. The salesman for Princeton Air, by contrast, told me they hired someone in 2015 to manage their online presence, after I asked him why their negative reviews seemed to end about six months earlier, with significant negative reviews before. Indoor Air beat Princeton Air's prices by a surprisingly large margin, and five other vendors' pricing by a lesser but still significant amount, right off the bat, and after some back and forth negotiating (I'm very aggressive on price.), he came within 5% of the lowest bid, which was an individual installer with no support staff. I've been surprised by the following: 1) The women who answer the phone always remember who I am and are genuinely friendly and helpful. 2) The service people came out within two hours after I accidentally put a box on a pipe in the attic that drains the water from the AC unit, such that water started dripping through the ceiling. I was mad as **** at them and quite obnoxious, thinking this was their installation fault; they remained patient and professional; and after the tech guy showed me the box on the pipe, he very patiently explained how he'd remedy things at no charge, even as the steam continued to rise from my ears as I argued with him, and then he took care of it immediately, which made me a bit sheepish. 3) Yesterday, a tech came out to my house to look at a problem with a hot water heater that they didn't even install, fixed the problem and didn't charge me for it. (He had been out earlier for annual maintenance of the AC unit and was still in the area.) I tend to be skeptical about tradespeople until proven wrong, but Indoor Air consistently makes me trust their judgement, pricing and professionalism. They've done a couple of other little things for me like replace a thermostat, which required significant rewiring, and their pricing and professionalism in going the second mile without additional charges has been very impressive."



Serving Frederick, PA and surrounding areas
In business since 2015
Free estimates
Emergency services offered
"Excellent !! Al and Mike were very attentive and supportive, and the installers Justin and Bert did fantastic work !! I am very happy with the whole experience."





+34
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