Heatco now offers our DF product line as an ETL and UL recognized component from 250 to over 11,000 MBTUs

Submittal Data Sheet Product Specifications OEM Instructions (Makeup Air) OEM Instructions (Process Air)

• Application of this component requires Agency listing /approval in Manufacturer’s equipment
• 100% Combustion Efficiency
• 250 MBH to over 11,000 MBH
• ETL and UL Recognized component listed to ANSI Z83.4 / CSA 3.7
• ETL and UL Recognized component listed to ANSI Z83.25 / CSA 3.19
• Built to applicable requirements of ANSI Z223.1 (NFPA 54) in the US and CAN/CGA-B149 in Canada
• DF Series Heat Modules are to be installed on the negative side of the circulating air blower.


– Natural or Propane Gas

– Cast Aluminum Headers

– Stainless Steel Diffuser Plates

– Manually Adjustable Profile Plates

– Indoor or Outdoor Installation

Performance Features

– Up to 30:1 Turndown

– VAV Air Flow Down to 50% without Modulating Dampers

– 100% of Available Heat goes into Air Stream

– Integral Safeties and Limits

Optional Features

– Wide Variety of Controls Options

– Gas Train Enclosure (NEMA 4 & 12)

– ANSI, CSA B149, UL, FM or IRI Gas Piping

– All Stainless Steel Construction

– Modulating dampers with integrated air controls

– Variable air volume down to 25%



– Makeup Air Systems

– Process Air Systems