24/7 Customer Service 301-315-6260


Shapiro & Duncan’s service department operates 24 hours a day, 7 days a week. Our service technicians are nationally and locally recognized. Read more here.

Our factory-trained and certified technicians provide commercial clients with troubleshooting, diagnostics, maintenance, repair or replacement of HVAC equipment, components and systems. We service all major brands of:

  • Air Handling Units
  • Boilers
  • Chillers
  • Cooling Towers
  • Controls
  • Dehumidifiers
  • Humidifiers
  • Indoor Air Quality Systems
  • Makeup Air Units
  • Split Systems
  • Variable Air Volume (VAV) Systems
  • Variable Frequency Drive (VFD) Systems
  • Variable Refrigerant Flow (VRF) Systems

Certified and Trained Technicians

Shapiro & Duncan provides fully qualified technicians to handle your maintenance problems. All senior technicians hold master licenses. In addition, our technicians have been factory trained by the following manufacturers and more:

  • Aaon
  • ABB
  • ASI Controls
  • Carrier
  • Daikin
  • Data Aire
  • Dectron
  • Desert Aire
  • Laars
  • Liebert
  • McQuay International
  • Power Flame Burner
  • Stulz/Air Technology Systems
  • Trane Company
  • Water Furnace
  • Weil-Mclain
  • York

Planned Maintenance

Through an effective Planned Maintenance program, Shapiro & Duncan can ensure the maximum life of customer equipment, keep operating costs at a minimum and avoid costly emergency breakdowns.
Planned Maintenance starts with a thorough, factory-prescribed system inspection. This enables us to make informed decisions about repair work and maintenance required to keep equipment safe and operating at peak efficiency.

HVAC Service On-the-Go

The HVAC service tablet used by Shapiro & Duncan’s Services team is to enable technicians to access failed equipment, see the history of the equipment, develop and update service tickets, order parts and for clients to approve work all on the go and on-site, right away. Shapiro & Duncan provides faster and more thorough real- time results on Service projects, eliminating the traditional standard where the technician would access and diagnose failures with the equipment, fill out a service ticket, and send it in for review at which point a proposal would be generated and sent to the client.

Annual Service Contracts

Through tailored annual service contracts, our commercial clients receive all of the following benefits:

  • Scheduled maintenance that extends equipment life
  • Improved equipment efficiency to control energy costs
  • Priority response to routine calls
  • 24-hour emergency response
  • Discount on labor and parts


2015: Chip Duncan, 2nd Place National PHCC HVAC Apprentice Competition
2014: Leroy Friend, 1st Place National PHCC HVAC Apprentice Competition
2013: Robert Monroe, 3rd Place National PHCC HVAC Apprentice Competition

“The Shapiro & Duncan Service Department is to be commended. The Service Department is an important partner in the continued success of our Technical Facilities Engineering group. Our assigned technicians are attentive to our needs and always willing to complete a job to our full satisfaction. The “can do” attitude is greatly appreciated by our team!”

David A. Clark

Discovery Communications Manager, Technical Facilities Engineering