
Sep 8, 2026
How Much Does HVAC Replacement Cost? (2026 Cost Guide)
Reading Time About 16 Min
Open 24/7

HVAC Company
Factory-certified HVAC and chiller servicing provider for commercial clients in the Washington D.C./Baltimore and Northern VA areas.
Horizon Mechanical Services LLC is an HVAC contractor based in Upper Marlboro, MD. Services listed include chiller servicing, boiler repair, new installations and HVAC system maintenance. 25 years in business and emergency service available.
25
Years in Business
Yes
Emergency Service
Upper Marlboro, MD
Service Area
No Best HVAC reviews yet
Been a customer of Horizon Mechanical Services LLC? Be the first to rate them.
Want to put your heating and cooling company in front of local homeowners and businesses actively searching for reliable HVAC services? Claim your spot and connect with high-intent customers in your area.
Get Featured

Sep 8, 2026
Reading Time About 16 Min

Sep 7, 2026
Reading Time About 6 Min

Sep 6, 2026
Reading Time About 7 Min

Sep 3, 2026
Reading Time About 6 Min
Have another question? Our team is here to help.
Horizon Mechanical Services LLC lists chiller servicing, boiler repair, new installations, HVAC system maintenance, chiller retrofitting and preventative maintenance. Contact them to confirm they handle your specific job.
Horizon Mechanical Services LLC is based in Upper Marlboro, MD.
Yes, Horizon Mechanical Services LLC lists emergency service. Call them directly for urgent heating or cooling repairs.
Use the call button, website link or contact details on this page to reach the company directly.
Get in touch and we will keep your listing details accurate and add photos.