Outdoor Power-Vented Gas-Fired Duct Furnace (HFP Series)

• ETL Certification for Commercial and Industrial Use in the US and Canada
• Available in 10 model sizes with input ranges from 100,000 to 400,000 BTU/hr.
• Airflow ranges from 750 to 15,000 CFM.
• Achieves 81% thermal efficiency for fuel savings.
• Air temperature rise range of 20°F to 100°F.
• Compatible with natural or propane gas (field convertible from natural to propane).
• Certified for a maximum external static pressure of 3.0″ W.C. for high static applications.
• Constructed from 18-gauge aluminized steel with a baked-on polyester powder paint finish on exterior parts.
• Features a rail-type mounting base for slab installation.
• Includes a 115V control step-down transformer with 24V gas controls.
• Right or left-hand control access can be specified during ordering.
• Certified for installation either upstream or downstream from cooling coils and includes a drain pan that allows connection to a condensate drain line.
• Offers a wide range of controls, options, and accessories for unit customization to meet demanding specifications.
• Equipped with an integral power exhauster for low-profile installation.
• Utilizes an intermittent pilot with a continuous retry control system for natural or propane gas operation.
• Provides right-side access to the burner and gas controls (when facing the discharge) with a slide-out burner drawer.
• Features side or bottom gas connections.
• Includes high-limit safety controls.
• Contains separate line and low-voltage terminal strips.
• Comes with a combination combustion air/exhaust vent cap.
• Powered by a power exhauster motor.
• Designed, engineered, and assembled in the USA.

• 409 stainless steel heat exchanger and burner
• 409 stainless steel drip pan
• Two-stage or electronic modulation controls for either natural or propane gas
• Building management compatible gas controls for modulation control using a 0-10 Vdc
• Multiple-furnace electronic amplifier for controlling up to 4 duct furnaces with one discharge air sensor
• Gas control step down transformers for 208/230V/1Ph and 208/230/460/575V supply voltages
• Left side access to the burner and gas controls
• Adjustable differential air flow proving system
• Fan delay timer
• High and low gas pressure switches
• Timed freeze protection
• Supply air fire stat
• Control relay – double pole, double throw
• Separate line voltage and low-voltage terminal strips
• Installed duct thermostat – electronic modulation

• Concentric vent kits
• Power exhaust step-down transformers for 450V and 575V
• Single and two-stage programmable heat/cool room thermostats
• Electronic two-stage duct thermostats
• Electronic modulating room and duct thermostats, including a room override for the duct thermostat
• Smoke detectors
• 7-day digital timers
• Summer/winter switch
• Condensate drain connection kits
• Pipe hanger adapter kits
• 5-10 PSI gas pressure regulators
• 4-foot exhaust vent extensions

The HFP series is specifically designed for outdoor applications and features a weatherproof design. It is designed for use with standard air handling systems in air conditioning, heating, or makeup air applications. Common applications include:

• Commercial Office Buildings
• Institutional Facilities
• Mechanical rooms
• Gymnasiums
• Multi-Purpose Rooms
• Cafeterias / Kitchen Hoods
• Lab Exhaust Hoods
• Bathroom / Locker Rooms
• Paint / Welding Booths
• Warehouse Pressurization