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.

Weatherproof  Enclosure

– Complete weatherproof vestibule and cabinet with duct flanges.
– Large, hinged galvanized steel door for easy access to components and controls.
– Fresh air intakes assure adequate combustion air supply.
– All heaters pre-wired to marked terminal strip for electrical supply.
– Insulated vent connectors to prevent heat build-up in cabinet.

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-NumberStd PDF Alt PDF PDF of Gas TrainPDF of Wiring DiagramMax Input MBHMax Output MBHMin Input MBHMin Output MBHMax Avail. Turndown (Nat)Max Ind. HX Input# of HX'sMax CFM @ Min RiseAPD @ Min RiseMax Temp RiseMin CFM @ Max RiseAPD @ Max RiseDim. ADim. BDim. CDim. DWeight (Lbs.)Total Amps 120VTotal Amps 208V 230V
HDB-HHP 225-450-O-WPDFPDFPDFPDF450360453610 to 12252166670.066055560.0143.6470.9382.0916.73N/a85
HDB-HHP 250-500-O-WPDFPDFPDFPDF500400504010 to 12502185190.086061730.0143.6470.9382.0916.73N/a85
HDB-HHP 270-540-O-WPDFPDFPDFPDF540432544310 to 12702200000.116066670.0143.6470.9382.0916.73N/a85
HDB-HHP 300-600-O-WPDFPDFPDFPDF600480604810 to 13002222220.136074070.0243.6470.9382.0916.73N/a85
HDB-HHP 315-630-O-WPDFPDFPDFPDF630504635010 to 13152233330.176077780.0243.6470.9382.0916.73N/a85
HDB-HHP 225-675-O-WPDFPDFPDFPDF675540453615 to 12253250000.066083330.0161.0170.9382.0916.73N/a127.5
HDB-HHP 350-700-O-WPDFPDFPDFPDF700560705610 to 13502259260.26086420.0343.6470.9382.0916.73N/a85
HDB-HHP 375-750-O-WPDFPDFPDFPDF750600756010 to 13752277780.266092590.0443.6470.9382.0916.73N/a85
HDB-HHP 400-800-O-WPDFPDFPDFPDF800640806410 to 14002296300.36098770.0443.6470.9382.0916.73N/a85
HDB-HHP 300-900-O-WPDFPDFPDFPDF900720604815 to 13003333330.1360111110.0261.0170.9382.0916.73N/a127.5
HDB-HHP 315-945-O-WPDFPDFPDFPDF945756635015 to 13153350000.1760116670.0261.0170.9382.0916.73N/a127.5
HDB-HHP 1000-1000-O-WPDFN/aN/aPDFPDF10008001008010 to 110001370370.719082300.0437.9101.1682.0921.74N/a10N/a
HDB-HHP 250-1000-O-WPDFPDFPDFPDF1000800504020 to 12504370370.0860123460.0178.3870.9382.0916.73N/a1610
HDB-HHP 350-1050-O-WPDFPDFPDFPDF1050840705615 to 13503388890.260129630.0361.0170.9382.0916.73N/a127.5
HDB-HHP 360-1080-O-WPDFPDFPDFPDF1080864725815 to 13603400000.2460133330.0361.0170.9382.0916.73N/a127.5
HDB-HHP 375-1125-O-WPDFPDFPDFPDF1125900756015 to 13753416670.2660138890.0461.0170.9382.0916.73N/a127.5
HDB-HHP 1200-1200-O-WPDFN/aN/aPDFPDF12009601209610 to 112001444440.9970126980.137.9101.1682.0921.74N/a10N/a
HDB-HHP 400-1200-O-WPDFPDFPDFPDF1200960806415 to 14003444440.360148150.0461.0170.9382.0916.73N/a127.5
HDB-HHP 1250-1250-O-WPDFN/aN/aPDFPDF1250100012510010 to 112501462961.0765142450.1237.9101.1682.0921.74N/a10N/a
HDB-HHP 350-1400-O-WPDFPDFPDFPDF14001120705620 to 13504518520.260172840.0378.3870.9382.0916.73N/a1610
HDB-HHP 375-1500-O-WPDFPDFPDFPDF15001200756020 to 13754555560.2660185190.0478.3870.9382.0916.73N/a1610
HDB-HHP 500-1500-O-WPDFPDFPDFPDF150012001008015 to 15003370371.9860123460.2774.977.4182.0919.81N/a157.5
HDB-HHP 400-1600-O-WPDFPDFPDFPDF16001280806420 to 14004592590.360197530.0478.3870.9382.0916.73N/a1610
HDB-HHP 350-1750-O-WPDFPDFPDFPDF17501400705625 to 13505648150.260216050.0395.7570.9382.0916.73N/a2012.5
HDB-HHP 600-1800-O-WPDFPDFPDFPDF180014401209615 to 16003666670.9460222220.1274.983.9182.0919.81N/a157.5
HDB-HHP 375-1875-O-WPDFPDFPDFPDF18751500756025 to 13755694440.2660231480.0495.7570.9382.0916.73N/a2012.5
HDB-HHP 1000-2000-O-WPDFN/aN/aPDFPDF200016001008020 to 110002740740.7190164610.0466.9101.1682.0921.74N/a20N/a
HDB-HHP 400-2000-O-WPDFPDFPDFPDF20001600806425 to 14005740740.360246910.0495.7570.9382.0916.73N/a2012.5
HDB-HHP 1200-2400-O-WPDFN/aN/aPDFPDF240019201209620 to 112002888890.9970253970.166.9101.1682.0921.74N/a20N/a
HDB-HHP 1250-2500-O-WPDFN/aN/aPDFPDF2500200012510020 to 112502925931.0765284900.1266.9101.1682.0921.74N/a20N/a
HDB-HHP 1000-3000-O-WPDFN/aN/aPDFPDF300024001008030 to 1100031111110.7190246910.0495.9101.1682.0921.74N/a30N/a
HDB-HHP 1200-3600-O-WPDFN/aN/aPDFPDF360028801209630 to 1120031333330.9970380950.195.9101.1682.0921.74N/a30N/a
HDB-HHP 1250-3750-O-WPDFN/aN/aPDFPDF3750300012510030 to 1125031388891.0765427350.1295.9101.1682.0921.74N/a30N/a
HDB-HHP 1000-4000-O-WPDFN/aN/aPDFPDF400032001008040 to 1100041481480.7190329220.04124.9101.1682.0921.74N/a40N/a
HDB-HHP 1200-4800-O-WPDFN/aN/aPDFPDF480038401209640 to 1120041777780.9970507940.1124.9101.1682.0921.74N/a40N/a
HDB-HHP 1250-5000-O-WPDFN/aN/aPDFPDF5000400012510040 to 1125041851851.0765569800.12124.9101.1682.0921.74N/a40N/a
Note: For Propane gas, turndown is 60% of stated natural gas turndown.