Series 78V

Series 78V Vertical Direct Gas Fired, Econo Make Up Air Heater | Hartzell Air Movement
Vertical Direct Gas Fired, Econo Type Make Up Air Heater

Hartzell’s Vertical Gas Fired Make Up Air Heater is an IRI pipetrain heater powered by 460-volt electrical input and natural gas. Each direct-heating unit is a complete air supply system in a self-contained package, consisting of a fan, burner, three-place remote station and controls. Part of the Rapid Ship family of products, in-stock models ship in 48 hours or less.

Excellent for localized supply air applications, the Series 78V Gas Fired Make Up Air heater is an industrial-duty, direct-heating unit constructed with powder-coated, 12-gauge, hot rolled steel and cast aluminum alloy propellers. Designed to be economical and energy efficient, Series 78V Make Up Air Heaters are also low-noise units that operate at 83 dBA or less at 5'.

With direct drive motors, Series 78V Make Up Air Heaters have no belts to adjust or replace. Extended lube lines to motors are included standard. The Make Up Air Heaters are configured for roof curb mounting and ready for connection to a gas line and power source. Each standard Make Up Air Unit comes with a bird screen and filter racks.

Additional Series 78V features:

  • Designed for natural gas or propane
  • 7,100 to 23,500 CFM at ¼" external static pressure
  • Heating capacities of 950,000 to 2,900,000 BTU/hr available
  • Controls are mounted and wired
  • Direct-drive fan arrangement; motor in airstream
  • Motors are totally enclosed
  • Extended lubrication lines to motors are standard
  • Cast aluminum airfoil propeller (adjustable pitch assemblies standard on 21,750 CFM units and up)
  • NEMA 4/12 enclosure
  • IRI control package is standard (also meets FM requirements)
  • NEMA 12 remote station
  • Maxitrol® 14 modulating temperature control is standard
  • Temperature-sensing elements mounted in airstream
  • High- and low-temperature limit control mounted within burner housing
  • Standard unit develops a maximum discharge temperature of 90°F (contact factory for optional discharge temperatures)
  • Motor-operated shutter
  • Access door for servicing is standard
  • Available with filters
  • Airflow proving switch
  • Fireye flame safeguard
  • Fused disconnect switch
  • High and low temperature controls
  • Mild weather thermostat
  • High and low gas pressure limits


  • Specifications
  • Resources
  • Market Applications
Material Type: 
Pressure Range: 
0-1.5" s.p.
Heating Equipment
Market Category: 
Food Processing
Heavy Industry