"I'm David Zhang. I have been providing HVAC service and installation to different families and property managers for nearly two decades. Understanding their need and providing an affordable solution has always been my mission."


We are licensed and insured. United Heating&AC provides affordable energy efficiency HVAC service and installation. We want our customers to have experience with today’s technological innovations to improve your in-house comfort. Our highly trained technicians are very flexible on working hours over weekends and after hour for your emergency repairs. In addition, we provide a free quote.

America’s Most Reliable™ HVAC System

Trane has more than 120 years of experience in the business. We don't just build our products – we own patents on them. And we don't just test our products – we push them to the extreme. If our product can't make it through torturous testing, you'll never see it in your home. It’s that kind of reliability that’s earned us America’s Most Trusted HVAC System*, three years in a row by Lifestory Research.

  • DPOR: Licensees Lookup

  • DLLR: Department of Labor, Licensing and Regulation, State of Maryland


© 2018 by The UNITED HEATING & AC LLC.

  • w-facebook
  • Twitter Clean