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Horizon Mechanical Services LLC Horizon Mechanical Services LLC
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Business Details
25 Years
experience
Emergency
services
Trusted Commercial HVAC Solutions
Established in 2001, Horizon Mechanical has built a reputation for delivering reliable HVAC solutions to commercial clients across the Washington D.C./Baltimore and Northern VA regions. Our factory-certified technicians specialize in installation, maintenance, and repair of heating, ventilation, and air conditioning systems, serving critical facilities like airports, schools, and data centers. With decades of combined experience, we prioritize proactive problem-solving, energy efficiency, and adherence to strict safety standards.

Our team holds certifications from leading manufacturers such as Carrier, Stulz, and Honeywell, ensuring technical excellence. We emphasize transparent communication, customized maintenance plans, and 24/7 emergency services to minimize operational disruptions for clients. Our project portfolio demonstrates a commitment to quality, with completed work at high-profile sites like the Embassy of Kazakhstan and Reagan National Airport.
Services
HVAC Installation Chiller Retrofits Emergency Repairs Energy Management Boiler Replacement Building Automation Preventative Maintenance Refrigerant Conversions Cooling Tower Services Control System Upgrades
Served areas
  • Wshington, D.C., Northern VA and Maryland
Details
  • Year established: 2001
Highlights and features
  • We have over 20 years of experience in commercial HVAC services.
  • Our technicians are factory-certified by major HVAC manufacturers.
  • We provide 24/7 emergency repair services for critical systems.
  • Our energy management solutions reduce operational costs by up to 40%.
  • We adhere to OSHA, DOT, and EPA safety and environmental standards.
Associations and certifications
  • Carrier
  • Stulz
  • Honeywell
  • WattMaster
  • Desert Aire
  • Aaon
  • Daikin
  • Sanyo
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Services
HVAC Installation
We install commercial heating, ventilation, and air conditioning systems for new constructions and facility upgrades. Our technicians handle centrifugal chillers, variable frequency drives, and building automation systems up to 1,000 tons. We ensure proper system sizing, code compliance, and integration with existing infrastructure for optimal performance.
Chiller Retrofits
Our retrofitting services modernize aging chillers to improve energy efficiency and reliability. We perform site analysis, component replacement, and system optimization while maintaining mechanical code compliance. This extends equipment lifespan and reduces energy consumption by up to 40% without requiring full system replacement.
Emergency Repairs
We provide urgent HVAC repair services for critical facilities requiring uninterrupted climate control. Our certified technicians respond to breakdowns at any hour, addressing issues with compressors, controls, and refrigeration systems to minimize operational downtime for airports, hospitals, and data centers.
Energy Management
Our energy management services optimize HVAC performance through building automation systems and data-driven analysis. We implement Trane Tracer technology for real-time monitoring, mobile alerts, and energy consumption benchmarking. This reduces operational costs while maintaining precise temperature control for commercial properties.
Preventative Maintenance
We offer customized maintenance agreements featuring quarterly inspections, oil analysis, and component cleaning. Our predictive analysis identifies potential failures before they occur, using vibration testing and refrigerant level monitoring. This proactive approach ensures system reliability and extends equipment lifespan for commercial clients.
Questions
What commercial HVAC services do you offer?
We provide installation, maintenance, repair, and retrofitting of HVAC systems including chillers, boilers, cooling towers, and building automation systems.
Do you offer emergency HVAC repair services?
Yes, we provide 24/7 emergency repair services for critical HVAC systems in commercial and industrial facilities.
Which HVAC manufacturers are you certified to work with?
We are factory-certified by Carrier, Stulz, Honeywell, WattMaster, Desert Aire, Aaon, Daikin, and Sanyo for repair and maintenance services.
What areas do you serve?
We serve Washington D.C., Baltimore, Northern Virginia, and surrounding areas including Prince George's County.
Can you retrofit aging HVAC systems?
Yes, we specialize in chiller and boiler retrofits to improve energy efficiency and extend system lifespan without full replacement.
Do you handle large-scale HVAC projects?
Yes, we've completed major projects at facilities including airports, embassies, schools, and government buildings.
Reviews (3)
Josh Brown
Nov 28, 2020 Report
Ural is a very detailed mechanic that has cured many issues stemming from failed construction projects at my place of business. If you're tired of wasting time with the usual big name contracting companies and would like to have an issue addressed on the first attempt, call Horizon Mechanical. Services: Heating system maintenance, HVAC duct & vent repair, Repair HVAC, Heating system repair, HVAC system maintenance
Tdcdun
Jul 25, 2011 Report
Our А/C unit went out. Horizon told us we needed a new unit. We bought a Carrier unit and it did not work. The following year Horizon replaced that unit because it was "defective." A year later it still doesn't work and now they tell us it is out of warranty. Another defective unit or a defective installer?

Beware - this company does not stand behind its product nor its workmanship. We are out almost $6,000 and still have no A/C. They do not return phone calls and they do not show up (until after the warranty expires) when they say they will.
Edward T.
Report
After some miscommunication about arrival time Ural arrived and worked continuously until he found and resolved a very difficult problem in an older house where many who had come before had worked unable to resolve the problem.