★ Family owned · Located in Trevose, PA
Honest heating & cooling, built on 23 years of hard, honest work.
Diamond Dave's Mechanical Service LLC is a family-owned HVAC contractor serving homes and businesses across Bucks County, Montgomery County, Philadelphia, and New Jersey. Old-school work ethic. Modern equipment. Fair, honest pricing — every single job.
As Seen at Philadelphia Eagles Games
Dave's mobile billboard clip
The 30-second spot that's run around Philly stadiums and events — straight to the point, like Dave.
Heating, cooling & everything in between.
We install, service, and repair the full range of HVAC equipment — for homes, offices, restaurants, and small commercial spaces.
Heating & Cooling Installation
Full HVAC system installs for new construction, replacements, and upgrades — sized and quoted honestly for your space.
HVAC Service & Repair
Diagnostics, tune-ups, and repairs for gas furnaces, electric systems, heat pumps, and central air conditioning.
Boilers & Water Heaters
Install and service for gas and electric water heaters, tankless systems, and residential or light-commercial boilers.
Real experience. Real people. Real fair pricing.
Most of our work comes from referrals and repeat customers. There's a reason for that.
Years in the trade
Two decades of side work grew into a business built on loyal customers. That experience is on every job.
Family owned
You'll deal with us directly — not a dispatcher, not a sales rep. Same family, every call, every visit.
Fair, honest pricing
Small operation, low overhead. We pass the savings on so you get a quote you can actually trust.
Side work that grew into a family business.
Diamond Dave's started the way a lot of good American trades businesses start — as side work for friends and neighbors. After 23 years of fixing furnaces, swapping out water heaters, and installing new systems on weekends and after hours, the loyal customers and word-of-mouth got too big to keep doing on the side.
So we made it official. Today we're a small, family-owned, fully licensed and insured HVAC company serving residential and commercial customers across Trevose and the surrounding Philadelphia area. The work is the same. The customers are the same. The pricing is still fair.
"Comfort that is set in stone." — that's the promise on the side of every truck.
The work speaks for itself.
A few recent installs from around the area — clean piping, properly vented, code-compliant, and built to last.
