Reznor's V3 series UDAS gas-fired separated combustion unit heaters are available in 14 sizes ranging from 30,000 to 400,000 BTUH gas input (sizes 30-125 are approved for residential application). Model UDAS heaters are designed for 82-83% thermal efficiency and are approved for installation in the United States and Canada by the Canadian Standards Association (CSA).

Note: Selection of either a horizontal or vertical combustion air/vent kit is required.

UDAS Product Literature


Key features of the UDAS

  • Sizes 30-400 certified for commercial/industrial heating application
  • Sizes 30-125 carry additional approval for residential garage/workshop heating applications
  • 82-83% thermal efficient, 50-60°F rise range
  • TCORE2 ® titanium stabilized aluminized steel heat exchanger


The UDAS can be used in many markets including:

  • Retail
  • Showrooms
  • Workshops
  • Schools
  • Exhibition Halls
  • Sports Facilities
  • Water Treatment
  • Industrial Manufacturing
  • Warehouse/Distribution
  • Food & Beverage
  • Residential

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