Denillo Heating & Cooling
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Denillo Heating & Cooling
Ask enough people in Pittsburgh's South Hills area who they trust for cooling and heating and you'll start to notice a pattern: "Denillo Heating & Cooling." That's what happens when you're a family-owned, second-generation business with four decades of making people happy.

From the high standards of founder Guy Denillo - "The Only Guy To Call" - to the leadership of son Nick, the Denillo Heating & Cooling team is at your service, striving for excellence and total customer satisfaction.Our technicians, installers and support staff go the extra mile to make your residential or commercial air conditioning project a positive experience that produces unsurpassed results.

Energy-efficient comfort, lower cooling and heating costs, clean indoor air, and fair prices - you can have it all with Denillo Heating & Cooling. We wouldn't want to settle for less and we don't expect you to! Our Repair Approach: We only fix what needs fixing, adjust what needs adjusting, and replace what needs replacing.
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Denillo Heating & Cooling is a family story. Guy Denillo, whose focus on quality and integrity earned him "The Only Guy To Call" status among loyal customers, founded the company four decades ago. He built his business on providing people with reliable comfort solutions and treating them with the personal attention of a good neighbor.
We've been serving South Hills area homeowners and businesses for four decades and still treat every service call like our future depends on it. To our way of thinking - it absolutely does. Timely response. Reliable work. Eager-to-please professionals. Taking care of your comfort goes smoother with Denillo Heating & Cooling.
Our Repair Approach: We only fix what needs fixing, adjust what needs adjusting, and replace what needs replacing. We're always happy to share what we know so you can make informed decisions about indoor comfort. Ask us anything. No need to postpone your comfort. Apply for a new heating and/or new air conditioning system that soothes you and your budget.
Weil-McLain Evergreen Gas Boilers are the most trusted systems in the industry. A favorite of homeowners and contractors alike, Weil-McLain offers models for residential and commercial applications so you can be sure you're getting the best unit for your needs. Denillo Heating & Cooling is your Weil-McLain certified dealer in Pittsburgh's South Hills area.
Take control of your air conditioning and heating comfort and costs with these practical pointers to help you head off big problems and get more for less. Regular maintenance is essential to the efficient operation of your equipment - a lack of it can compromise comfort and reliability. Consider getting a Denillo Preventative Maintenance Agreement.
Reviews (13)
Hilary Marcella
Hilary Marcella
Dec 20, 2021
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My 27 year old furnace stopped heating 2 days before Christmas. After being told by a different company that the issue was irreparable and I needed to replace my entire furnace -- which couldn't be done until two days *after* Christmas -- I called Denillo. Their rep showed up at 8am sharp on Christmas eve, listened to my description of what was happening, and identified the problem within 5 minutes. A $40 fix restored my heat so my household was warm for Christmas. When I do eventually replace my old gal, I'll be calling Denillo's for sure!
Daniel Sunseri
Daniel Sunseri
Dec 02, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Our furnace stopped blowing warm air in the middle of the night. Contacted them at 6 AM based on internet reviews. They responded quickly and the furnace was up and running by 11 AM. Very happy with service
Service: Repair heating system
Capaproud
Capaproud
Dec 01, 2021
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Denillo came to do an annual checkup on my 2 yr old W&M boiler. They were on time and because the boiler is relatively new—all went well. Hoping they can answer more details on installing an instantaneous hot water system with my unit. Tech was a bit new for that info-but he was very professional. Look forward to working with them for future needs.
Lee Taylor
Lee Taylor
Nov 23, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Shane was very thorough and explained everything in great detail. Really pleased with the quality of the work and will definitely use them again.
Service: Heating maintenance
Frank Hanzel
Frank Hanzel
Nov 16, 2021
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Everyone here is a pleasure to deal with. And my technician Shane is an amazing person. And there is no salesmanship garbage or anything like that. It's all straightforward and relaxed. This is a special company. I love you guys!!!!
Maria Snyder
Maria Snyder
Nov 06, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Shane was very professional and did an excellent job. He was done promptly and the cost was reasonable. When we are ready to replace our heating and cooling, I will be following up with them.
Service: Heating maintenance
Ronna Goldstein
Ronna Goldstein
Nov 02, 2021
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I was very happy with the service.. he came on time, very professional and the price was reasonable. I would recommend Denillo.
Services: Repair thermostat, Repair heating system
Tom Lind
Tom Lind
Oct 27, 2021
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I woke up to find my furnace was not coming on and it was 32 degrees outside so I called Denillo for help. Not only were they there the same morning, they spent the time to fix the issue and explain what they did at a very reasonable cost. They tested everything and made sure I was satisfied before they left. I have had negative experiences with other companies and after the service I get consistently with Denillo I would not use anyone else.
David McKain
David McKain
Aug 24, 2021
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Positive: Professionalism, Punctuality, Quality, Value
The gentleman who arrived was amazing. He was courteous, knowledgeable and diagnosed the problem immediately and was in and out in under an hour. And the price was very reasonable.
Service: AC maintenance
Lindsay Choma
Lindsay Choma
Jul 18, 2021
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Positive: Quality, Responsiveness
Nick provided excellent customer service on the phone & was able to arrange an almost immediate response to diagnose the problem. Shane came out quickly to resolve the issue & had us back in working order in no time! Truly appreciate it & would 100% recommend!
Service: Repair AC
Brian K.
Brian K.
Mar 30, 2021
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Please dont soliciate this busniess. I live on the same block as this business. He parks his trucks illegally and is totally disrespectful to his neighbors. Its a blight on the neighborhood and he is totally uncooperative. His men are working at all hours in a residential area and is disrespectful
Charles Z.
Charles Z.
Jul 05, 2020
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This was the first time that I ever used Yelp. I was in the bind my whole house air conditioning quit working, I looked at Yelp and Denillo was The first people to respond and also was able to come out on Sunday. Nick explain to me all the costs up front and didn't pull any surprises.
He followed all the COVID-19 protocols, was very very professional and the job quickly.

I thought that I got very good service and was not overcharged, that's not something that happens very often.
I am not one to be on social media and write good or bad reviews but this one definitely deserves a good review
Susan G.
Susan G.
Apr 22, 2020
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We recently had a new Trane furnace and AC unit installed and highly recommend! Very knowledgeable, personable and professional from the office staff to the installers! So glad we went with them!