Pittsburgh-Area HVAC Service Built to Last a Generation.
Most contractors fix it and move on. We install, repair and maintain HVAC systems the way tradespeople used to — with the craftsmanship and accountability you'd expect from someone whose name is on the work. Serving Allegheny, Westmoreland, Fayette and Washington counties.
TRUSTED HVAC SERVICE IN SOUTHWESTERN PENNSYLVANIA
Heirloom Mechanical serves homeowners and businesses across Allegheny, Westmoreland, Fayette, and Washington counties. Repairs, replacements, maintenance — done right the first time.
REQUEST SERVICE5.0
Google Rating
70+
Google Reviews
24/7 Emergency
Service Available
Licensed & Insured
Background-Checked Techs
PA HIC Registered
No. PA196206
50+ combined years
50+ years of combined HVAC and business experience across our team.
Five-star service
Consistently five-star rated by homeowners and businesses across southwestern Pennsylvania.
Financing available
Flexible financing available for qualifying equipment replacements.
HVAC SUPPORT BUILT AROUND YOUR PROPERTY
Residential HVAC
Repairs, replacements, and maintenance for heating and cooling systems in your home — done right, on time, and explained clearly.
EXPLORE RESIDENTIAL SERVICESCommercial HVAC
From rooftop units and ductwork to boilers and split systems, we service commercial properties of all sizes across southwestern Pennsylvania. Our technicians carry the parts and training to diagnose fast, repair right, and keep your building running — with maintenance contracts available for facilities that can't afford surprises.
We've completed commercial installations and service contracts for light industrial, retail, and multi-unit properties throughout Allegheny, Westmoreland, Fayette, and Washington counties.
EXPLORE COMMERCIAL CAPABILITIES
CORE SERVICES — HELP WHEN YOU NEED IT. BUILT TO LAST
Heating & AC Repair
Prompt diagnosis and honest repair options for furnace repair, air conditioning repair, and all residential and commercial heating and cooling problems — available 24/7 for emergencies.
REQUEST SERVICEHVAC Installation & Replacement
Properly sized and professionally installed heating systems, cooling systems, and HVAC equipment for lasting comfort and peak efficiency — with financing available for qualifying projects.
VIEW INSTALLATION OPTIONSHVAC Maintenance
Preventive maintenance visits that keep your heating and cooling system running efficiently, catch problems before they become failures, and extend the life of your equipment.
VIEW MAINTENANCE OPTIONSWhat Our Customers Say
ADP
November 3, 2026
Furnace wasn't working and within an hour of initially calling Noah had gotten it back running. Completed a preemptive repair that needed a part ordered and was received and the service completed by Monday afternoon. Would highly recommend for anyone searching for service!
Thomas Zebrak
November 3, 2026
Cleaned and checked the furnace and was very helpful.
Donna Schiavo
October 26, 2026
They come to my rescue every time. Love you guys. Thank you so. So. So. Much. Donna S.
Sharon Ruhe
October 22, 2026
Noah Stolish was very polite and professional. Noah did an inspection of my furnace even changed filters for me and my ac unit for the new buyers of my . They showed up right after my call and so easy to deal with. Highly recommend!!
patty cassol
September 30, 2026
We had furnace issues, pressure switch and inducer motor replaced by another company, which wasn't the problem at all, called Heirloom Mechanical. Kevin replaced the pvc outflow after full electrical diagnostics. Now it runs great. Professional, knowledgeable, courteous, they are who you want for your hvac needs. RJ Cassol
Patrick Biddle
September 30, 2026
I obtained a few quotes from different companies for a new furnace, AC unit, and a larger filter slot, and Heirloom came in at the best price. I told Kevin what I wanted; he listened, provided helpful suggestions, and gave me several quotes to choose from without any pressure. They scheduled an appointment within a week and installed everything in just one day. The crew that arrived was respectful, polite, and took the time to answer my questions. I did have a couple of minor things that needed adjusting after the install, but they came right out the next day to fix them. They installed a furnace, AC unit, and the larger filter slot, and everything has been working perfectly for over a month now. Overall, a great experience. I highly recommend them!
Happy with our service? We'd love to hear from you.
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READY FOR HVAC SERVICE BUILT TO LAST?
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Fast, dependable HVAC service for Pittsburgh-area homes and businesses
We handle repairs, replacements, maintenance, and commercial HVAC throughout Allegheny, Westmoreland, Fayette, and Washington counties. For urgent issues, call us directly — we're available 24/7. Financing options available for qualifying replacements.
Heirloom Mechanical
Locations
Mount Pleasant
213 Elm Drive, Mount Pleasant, PA 15666Hours
Available 24 hours a day, 7 days a week for emergency HVAC service.
Need HVAC Service in Southwestern Pennsylvania?
We're available 24/7 for heating and cooling emergencies. Call now or request service online — we'll get back to you fast.