
Ductless mini split systems complete installation and repair., Central air conditioning complete installation and repair., Water heater replacement and repair. , and 2 more
"Andrew very patient and knowledgeable young man. I enjoyed working with him. Not to mention he was the best job and price out there!"
Barry L. in November 2023

HVAC Replacement, Mini Splits, Heaters , and 2 more
"They are work great and fast. Overall very pleasure experience"
24B3839B0492A2395B2EEA0164E54F0CFC7C7BCF8AEA2093CEE2FFE883DCBD6E 8. in April 2024
HVAC
"Sergii responded within 15 minutes of my posting on Angi. He was at the house within another 1/2 hour. Absolutely amazing quick service. He discovered the problem and our heater was up and running. We will definitely keep him in mind for any of our plumbing/ heating needs."
Claire D. in November 2022
In business since 1980
About us: "In 1972, Donnelly’s Cooling, Heating & Plumbing began serving Pennsylvania residents with premier plumbing services and later expanded to add their superior HVAC services. As the area’s top choice for plumbing, heating, and cooling service, we’re proud to offer unmatched professionalism and quality results. With same-day and emergency services, our team is always available for your home service needs. Plus, with service for all brands and free estimates, you can trust you’re in excellent hands with our team."

Plumbing, Electric Installations, HVAC Installations , and 2 more
"Very knowledgeable, on time, very personable and did an excellent job."
Bill B. in June 2023

Furnaces, Boilers, central & ductless A/C & Heat Pumps, Gas Fireplace., Experienced HVAC installer and Service Tech. EPA Cert # 0352207329800., Electrical wiring and repairs; all work underwritten as required by code. , and 2 more
"2 days before xmas, not a flame on my place, company coming in two days, family room a cold space ! Pat came out in two hours and got the fireplace burning and had the iinsight to take the model number of the propane fireplace, because he could order parts in the future , as our pilot assembly is getting worn."
bob P. in December 2012

HVAC, Remodeling, Plumbing , and 5 more
"I requested a ceiling fan install. The technician showed up on time. He was very professional, well mannered and got the job done in no time. I will definitely use this company again for future electrical needs."
F3F9786EECA11A965177633EF2D7C1D4A5908C25717E2A3C0FDD273CD5D6D7D4 6. in June 2025

Sewer & Water Line Replacement - We Can Repair or Replace a Water or Sewer Line Without Destroying Your Front Lawn - Call for a Free Water or Sewer Line Inspection, Plumbing - Water Heaters, Leaky Faucets, Running Toilets, Sump Pump Repair & Installation & Much More, Heating - We Service All Makes & Models, 2 Year Warranty on Repairs, Annual Service Plans for Cleaning & Maintaining Equipment , and 2 more
"The technician was very understanding and knowledgeable."
Paula R. in July 2019
Chalfont HVAC & Air Conditioning Contractors are rated 4.8 out of 5 based on 1596 reviews of 1596 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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