Standard Rack Assembly

– Fully sheeted duct furnaces mounted in a 16-gauge galvanized steel frame.
– Provides listed temperature rise and air side pressure drop performance.
– Each furnace includes an individual shutoff valve, flexible gas connector & union piped to properly sized supply header.
– Condensate drains pre-piped to a common header.
– Easy removal of any single duct furnace.
– All controls prewired to a sequencer for system control.
– Customer only needs to provide Power, “Call for Heat” and a 0-10 VDC signal.

Outdoor Venting Kit

– Vent riser assembly with integral rain cap.
– Provides proper venting of flue gases and prevents flue gas recirculation into burner combustion air supply.


Application Guidelines Product Specification User Guidelines OEM Instructions Submittal / Order Information

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Model NumberPDFAlt PDFPDF of Gas TrainPDF of Wiring DiagramMax Input MBHMax Output MBHMin Input MBHMin Output MBHNat. Gas Turndown RatioMax Ind. HX Input# of HX'sMax CFMMax APD @ Min RiseMax Temp RiseMin CFMMin APD @ Max RiseDim ADim BDim CDim DWeight (Lbs.)Total Amps 120VTotal Amps 230V
HDA-VHX-150-300-OPDFPDFPDF3002433024.310 to 1150275000.4410022500.0239.5729.9844.6616.547885
HDA-VHX-200-400-OPDFPDFPDF4003244032.410 to 12002100000.7810030000.0639.5729.9844.6616.550385
HDA-VHX-150-450-OPDFPDFPDF4503643024.315 to 11503112500.4410033750.0258.5429.9844.6616.5717127.5
HDA-VHX-250-500-OPDFPDFPDF5004055040.510 to 12502125000.7910037500.0746.0729.9844.6616.551885
HDA-VHX-300-600-OPDFPDFPDF6004866048.610 to 13002150000.810045000.0752.5729.9844.6616.556185
HDA-VHX-200-600-OPDFPDFPDF6004864032.415 to 12003150000.7810045000.0658.5429.9844.6616.5755127.5
HDA-VHX-350-700-OPDFPDFPDF7005677056.710 to 13502175000.8110052500.0859.0729.9844.6616.561985
HDA-VHX-250-750-OPDFPDFPDF7506085040.515 to 12503187500.7910056250.0768.2929.9844.6616.5779127.5
HDA-VHX-400-800-OPDFPDFPDF8006488064.810 to 14002200000.8810060000.0865.5729.9844.6616.567285
HDA-VHX-300-900-OPDFPDFPDF9007296048.615 to 13003225000.810067500.0778.0429.9844.6616.5829127.5
HDA-VHX-500-1000-OPDFPDFPDF10008101008110 to 15002250000.9610075000.0978.5729.9844.661876810
HDA-VHX-350-1050-OPDFPDFPDF10508507056.715 to 13503262500.8110078750.0887.7929.9844.6616.5908127.5
HDA-VHX-600-1200-OPDFPDFPDF120097212097.210 to 16002300001.0310090000.191.5729.9844.661882910
HDA-VHX-400-1200-OPDFPDFPDF12009728064.815 to 14003300000.8810090000.0897.5429.9844.6616.5988127.5
HDA-VHX-500-1500-OPDFPDFPDF150012151008115 to 15003375000.96100112500.09117.0429.9844.66181160157.5
HDA-VHX-600-1800-OPDFPDFPDF1800145812097.215 to 16003450001.03100135000.1136.5429.9844.66181220157.5
Note: For Propane gas, turndown is 60% of stated natural gas turndown.