24/7 Customer Service 301-315-6260


Shapiro & Duncan’s service department operates 24 hours a day, 7 days a week. 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 (VRD) 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, all technicians have been factory trained by the following manufacturers and more:

  • ABB
  • ASI Controls
  • Daiken
  • Dectron
  • Desert Aire
  • Liebert
  • McQuay International
  • Stulz/Air Technology Systems
  • Trane Company
  • Water Furnace

Planned Maintenance

Through an effective Planned Maintenance program, Shapiro & Duncan can ensure 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

This HVAC service tablet is used by Shapiro & Duncan’s Services team 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