 Reznor® Venturion® HEEDU Series High CFM Indoor Duct Furnaces were developed to provide an annual fuel use improvement of up to 25% when compared with gravity-vented duct furnaces. The use of a factory-installed power venter, with metered combustion air, limits burner flue losses while reducing the required vent pipe size. A sealed vent product collectionchamber, in lieu of a draft diverter, reduces the loss of dilution air from the room in both the on and off cycles.
The 80% thermal efficient Series HEEDU duct furnaces are available for use with either natural or propane gas, as specified, in sizes from 75,000 through 400,000BTUH gas input. They are designed for use as heating components in heating, heating/cooling, or makeup air systems and require a separate blowersystem for air delivery. The furnace has a Reznor® Thermocore® aluminized steel heat exchanger with venturi-design tubes. The die formed burners areof aluminized steel and include flared ports with stainless steel insert.
The HEEDU model is approved for a Temperature Rise range of 20° to 70°F. Included as standard on the HEEDU Series are an intermittent spark pilot and a single-stage 24-volt gas valve. Model HEEDU Series units are designed for field connection to a 24-volt thermostat for automatic operation.
All required limit and safety controls are provided, including a combustionair pressure switch, which verifies proper vent flow prior to allowing operation of the gas valve.
Notes:
- Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot filter, pressure regulator, pilot shutoff,and manual shut-off, all in one body. Gas supply pressure must not exceed 0.5 PSI (8 oz. - 14 " W.C.). Minimum inlet pressure for natural gas is5" W.C. Minimum inlet pressure for propane gas is 11" W.C.
- For air inlet temperatures below 40°F or temperature rise less than 40°F, an optional stainless steel heat exchanger is recommended.
- Blower must be placed on entering side of furnace.
- Approved for installation downstream of an air conditioning coil (optional drain flange, stainless steel heat exchanger, and stainless steel burners are recommended).
- Not approved for residential use.
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