Hercules Product Info 
Hercules Product IdUDAS75
Product DescriptionHEATER UNIT FIRED GAS 75000BTU/HR 115VAC
Unit of MeasureEA
Manufacturer Info 
Manufacturer NameReznor
Brand NameReznor®
Part NumberUDAS-75
Product DescriptionReznor® UDAS-75 V3 Low Static Gas Fired Unit Heater, 75000 Btu/hr, 115 VAC, Liquid Propane, Natural Gas Gas
Product Features
Reznor's V3 Series UDAS gas-fired separated combustion unit heaters are available in 14 sizes ranging from 30,000 to 400,000 btu/h gas input (Sizes 30-125 are approved for residential application). Model UDAS heaters are designed for 82 to 83 percent thermal efficiency and are approved for installation in the United States and Canada by the Canadian Standards Association (CSA). The first ever separated combustion system in the commercial/industrial heating industry was introduced on a Reznor heater in the 1960's, and that proven technology is continued in this new separated combustion product. Model UDAS separated combustion units require installation of a specially designed combustion air/vent system including the unique concentric adapter box that allows for only one building penetration for both the vent and combustion air.
Sizes 30 to 125 certified for residential heating application
Sizes 30 to 400 certified for commercial/industrial heating application
82 to 83 % thermal efficient
50 to 60 deg F rise range
New T-core 2 design titanium stabilized aluminized steel heat exchanger (patent pending)
New T-core 2 single burner combustion system including a one-piece burner assembly (patent pending)
115/1/60 supply voltage
115 V open fan motor with internal overload protection
Transformer for 24 V controls
Integrated circuit board with diagnostic indicator lights
Multi-try direct ignition with 100 % lockout
Fan relay (included on the circuit board)
Natural or propane single-stage gas valve (field adjustable for operation to 9000 ft elevation)
Vibration/noise isolated fan and venter motors designed for low noise operation
2-pt and 4-pt suspension standard on all sizes
External terminal strip for 24 V wiring
External gas connections
Full fan guard engineered for safety
Improved cabinet design with less visible hardware and a new reznor appearance, Selection of either a horizontal or vertical combustion air/vent kit is required
75000 Btuh or 22 kw/h heat capacity
Applications: Commercial and Industrial
Product Documents 
Document TypeDownload Link
Specification SheetUDAS75_Specification Sheet (pdf)
Warranty InformationUDAS75_Warranty Information (pdf)
CatalogUDAS75_Catalog (pdf)
Instruction/Installation ManualUDAS75_Instruction/Installation Manual (pdf)
Line DrawingUDAS75_Line Drawing (pdf)
Product URLs
UDAS-75 Video Link
Product Specifications 
Type Low Static
Series V3
Capacity 75000
Voltage Rating 115
Amperage Rating 3.3
Frequency Rating 60
Power Rating 217
Flow Rate 961
Gas Type Liquid Propane, Natural Gas
Gas Connection 1/2
Temperature Rating 50 to 60
Mounting Type Ceiling
Finish Glossy White
Dimensions 15-1/8 in H x 26-5/8 in W
Certifications ANSI Z83.8b|CSA 2.6b