21595 Cedar Ln
Sterling, VA 20166
Phone: 703/430-5888
Tollfree: 866/630-5888
Fax: 703/430-2629
Dualco, Inc.. HVAC Services include:
  • Heat Pumps
  • Heating: Installation, repair and servicing
  • Air Conditioning: Installation, repair and servicing
  • Load Calculation and Custom System Design
  • System Replacements
  • Sheet Metal Ductwork
  • Custom Sheet Metal Fabrication

Dualco, Inc. offers comprehensive preventive maintenance and service programs to include:

  • Dualco, Inc.'s Automatic Periodic Inspections include lubricating, adjusting, and safety testing your heating and cooling system. This will keep it running at peak, trouble-free, efficiency. With your HVAC system running efficiently, it keeps your energy consumption at a minimum. A complete checklist is provided after each service call.
  • With Dualco, Inc.'s Planned Service Inspections we can help reduce the number of emergency calls by spotting potential problems long before they turn into trouble that waste your time and money.

  • With all our Preventative Maintenance Agreements You set the number of planned service calls per year. Pricing is determined by the amount of calls per year. Planned Service repair workmanship has a 1 year warranty on all parts.