
Gutter Cleaning
"Matt mounted our TV to our brick fireplace. He did an amazing job! He was on time, clean, friendly, and very reasonably priced! Thanks for your great work Matt!"
Amber W. in December 2020

Central A/C, Heating and Furnaces, Central A/C , and 4 more
"Signature inspected my whole heating and cooling system to ensure it was working correctly and submitted a compettivie bid to install a new furnace and A/C. They were responsive, clean and showed up as promised."
Trip C. in May 2009

HVAC
"Absolutely fantastic experience with George. I got home from a work trip at 5:00pm to discover my furnace s blower fan had burnt out. George came that evening and stayed until 9:30 to fix it, at a price that was more reasonable than those quoted by others. He was a true professional and I would recommend him to anyone."
Jake B. in December 2019
HVAC
"Duane was great. He came out and figured out the problem with my heating system (noisy and shaking). He fixed the issue for a very reasonable fee and explained his other products and services without being the least bit pushy. Would recommend their services."
David S. in March 2012
ALL HVAC SERVICES, Refrigeration
"Did a radiator and boiler inspection, fixed an issue with my boiler. Called back to install a digital wifi thermostat. Will also be calling to replace my boiler before next year. Great guy, excellent pricing. Going to be doing lots of business with him!!!"
Benjamin B. in October 2023
HVAC
"Sergii was able to fit us in his schedule in the midst of a severe heat wave. He and his team worked expeditiously and were able at install a new air conditioning system as well as align the existing furnace with the new system the same day. The air conditioning system is working fabulously well and I have no complaints. Will definitely recommend him for the services he provides in the HVAC world."
Betty H. in July 2024
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
"I should have written this review a year ago when the work was done. I needed a new heater. A neighbor recommended Marshall Services. I have found them to be a knowledgeable, family-owned team that truly stands out. They’re remarkably adaptable to change—adjusting plans smoothly when new needs arise—and their communication is excellent: clear, proactive, and easy to understand. From the first conversation, their honesty and transparency inspired my confidence, and every interaction since then reinforced that trust. Most importantly, you can count on them. They follow through on commitments, keep you updated without asking, and deliver quality work with genuine care. The combination of expertise, reliable service, and that family-owned touch made the entire experience seamless and stress-free. Marshall Services is my go-to HVAC company and has my highest recommendation."
3E501AEB98CC34BC356F259DE7649D52FDFEF0D5D357D4626A81A19BC3D89858 E. in May 2026

HVAC, Remodeling, Plumbing , and 5 more
"Longacre is the best. I had an issue with my water heater. They contacted me so quickly, was able to get me scheduled same day and showed up within 1hr. By far the best. From the time they showed up they were very professional, clean and thorough. You gained a loyal customer. Thank you for your business."
067CE09602049454035A6CCD4FC197FA038B4A567EAA2CD457465278E0547F95 5. in February 2025
"A positive experience. Great communication before and during the project. I had a new central air system as well as heating completed. Could not be happier. Came when they said they would, completed on time and the area was left cleaner than when it started. You will not go wrong if you hire them for your heating and cooling needs."
Gerri D. in September 2024

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
"After signing up with Servicepro, I was on the phone with Horizon within 10 minutes. This was about 9:30 PM. They offered to come and fix the problem he next morning (day before Thanksgiving) but I declined because I was going away. Anyway I scheduled a 10 am appointment for Friday November 28, 2008 and they were very prompt. The techinitian expalined the issue and my heat was up and running within the hour. Very impressed with their service and professionalism. I am now signed up for annual check up for my HVAC system and would not hesitate to recommend them to others."
kirk A. in December 2008

Generator Installs, Panel Upgrades, Electrical Switches, Outlets & Fixtures - Repair
"This was as good an experience as one could want given a plumbing problem."
Duane C. in November 2022
Air Conditioning - We Service All Makes & Models, 2 Year Warranty on Repairs, Annual Service Plans for Cleaning & Maintaining Equipment, 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 install was a smooth process. They were professional and provided guidance on appropriate unit selection for the space. I would certainly rehire WM Henderson Plumbing & Heating for future HVAC projects."
Jamal C. in October 2022
In business since 1989
Water Heater Install, Water Heater Repair, Drain Clearing , and 1 more
About us: "WM Henderson is a member of the Horizon Family of Services. Horizon Services, Inc., is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey and Northeastern Maryland. After a quarter of a century in business, Horizons Services, Inc., remains fully committed to setting the industry standard for customer service, installation and focusing on things that are important to busy homeowners."
Conshohocken Heating & Furnace Contractors are rated 4.6 out of 5 based on 1762 reviews of 1762 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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