Your Trusted
Heating & Cooling Experts
Fast, reliable HVAC repair, installation & maintenance — serving Maryland & Surrounding Areas. Licensed technicians on call 24/7 with upfront pricing.
Whatever Your Heating & Cooling Needs
We service and install all makes and models — residential and commercial.
Decades of Experience.
Comfort You Can Trust.
Demo HVAC Co. delivers exceptional comfort for your home or business. Our highly skilled technicians have built decades of experience providing exceptional HVAC maintenance, repair, and installation services. We're here for you 24/7, so you can always breathe easy.
- NATE-Certified technicians on every job
- 24/7 emergency service — nights, weekends, holidays
- Upfront pricing — no hidden fees, ever
- 40+ years serving Maryland & Surrounding Areas
- Licensed, bonded & insured
- 100% satisfaction guarantee on all work
- Same-day and next-day appointments available
- All makes and models — residential & commercial
Our Customers Are Our
Top Priority
“Our heat went out on one of the coldest days of the year. They had someone out in under 3 hours. The staff and techs are very polite and knowledgeable. Absolutely would recommend!”
“The installation of my new furnace and A/C was just completed. These guys were very professional and easy to talk to. Extremely clean installation. I wouldn't hesitate to refer this company to anyone.”
“I got 5 bids for ductless units in my 1915 bungalow. Their bid was competitive AND included the electrical work and came with a warranty that others didn't offer. Very happy with the install.”
Getting Started Is Easy
Call or Book Online
Reach us 24/7 by phone or schedule online in under 60 seconds. We'll confirm your appointment immediately.
On-Time Arrival
A licensed, background-checked technician arrives on time in a marked truck with a full supply of parts.
Honest Diagnosis
We diagnose the problem and give you a clear, upfront quote before any work begins. No surprises.
Fixed Right, Guaranteed
We fix it properly the first time, backed by our 100% satisfaction guarantee and parts warranty.
10% Off Services With a Maintenance Agreement*
*Conditions apply. Call for more details.
Authorized to Service & Install All Major Brands