About HeyMon Mechanical
Built on Trust. Backed by Experience.We started HeyMon Mechanical with one goal: give Houston homeowners and businesses an HVAC company they could actually count on. No runaround, no inflated quotes, no disappearing acts.
Our Story
More than 20 years ago, Leo Marsh founded HeyMon Mechanical right here in Houston after spending years working for some of the biggest names in the HVAC industry. He had seen firsthand what large companies did well—but he also saw what could be done differently.
Leo believed homeowners deserved HVAC service that felt a little more personal. A company where you could get an experienced opinion without feeling pressured into an unnecessary repair or replacement. A company that valued doing the job right, treating people fairly, and building relationships that lasted beyond a single service call. That belief became HeyMon Mechanical.
For more than two decades, we've helped Houston-area families stay comfortable through scorching summers, unexpected cold snaps, and everything in between. We've grown through experience, referrals, and the trust of customers who know they can call us when something isn't right. Today, we still operate with the same small-business values HeyMon Mechanical was founded on: honest recommendations, quality workmanship, fair treatment, and dependable service.
Honest Pricing
You get a written quote before we start. No surprises on the invoice.
Same-Day Service
We keep trucks stocked with common parts so most jobs get done in one visit.
Backed by Warranty
All labor is covered by our warranty. If something isn't right, we come back.
Local & Accountable
We live and work in Greater Houston. Our reputation is on the line every job.
Licensed, Certified & Insured
NATE Certified
All technicians hold North American Technician Excellence certification — the industry's highest standard.
TACLB Licensed
Fully licensed by the Texas Department of Licensing and Regulation for HVAC work in Texas.
EPA 608 Certified
Certified for safe handling and recovery of refrigerants on all system types.
Fully Insured
General liability and workers' compensation insurance on every job, every time.
Where We Work
We serve the entire Greater Houston metro area — residential and commercial. If you're in the Houston area and need HVAC service, we can get to you.
Ready to Work With Us?
Call us or fill out the form — we'll get back to you fast.