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.

Indoor Venting Kit

– Custom Heat Fab, SAF-T, AL294C stainless construction.
– Category 1 rated common vent system to B-vent adapter.
– 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

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 208V 230VDim EDim F
HDB-VHX-180-360-IPDFPDFPDF360292362910 to 1180290000.119030000.0142.3721.1378.417.1354085
HDB-VHX-200-400-IPDFPDFPDF400324403210 to 12002100000.139033330.0242.3721.1378.417.1354085
HDB-VHX-225-450-IPDFPDFPDF450365453610 to 12252112500.169037500.0248.8721.1378.417.1354085
HDB-VHX-250-500-IPDFPDFPDF500405504110 to 12502125000.159041670.0248.8721.1378.417.1354085
HDB-VHX-270-540-IPDFPDFPDF540437544410 to 12702135000.139045000.0255.3721.1378.417.1358085
HDB-VHX-180-540-IPDFPDFPDF540437362915 to 11803135000.119045000.0162.7421.1378.417.13760127.5
HDB-VHX-300-600-IPDFPDFPDF600486604910 to 13002150000.169050000.0255.3721.1378.417.1358085
HDB-VHX-200-600-IPDFPDFPDF600486403215 to 12003150000.139050000.0262.7421.1378.417.13760127.5
HDB-VHX-315-630-IPDFPDFPDF630510635110 to 13152157500.159052500.0261.8721.1378.417.1362285
HDB-VHX-225-675-IPDFPDFPDF675547453615 to 12253168750.169056250.0272.4921.1378.417.13760127.5
HDB-VHX-350-700-IPDFPDFPDF700567705710 to 13502175000.189058330.0261.8721.1378.417.1362685
HDB-VHX-360-720-IPDFPDFPDF720583725810 to 13602180000.169060000.0268.3721.1378.417.1367485
HDB-VHX-375-750-IPDFPDFPDF750608756110 to 13752187500.189062500.0268.3721.1378.417.1367485
HDB-VHX-250-750-IPDFPDFPDF750608504115 to 12503187500.159062500.0272.4921.1378.417.13813127.5
HDB-VHX-400-800-IPDFPDFPDF800648806510 to 14002200000.29066670.0268.3721.1378.417.1367485
HDB-VHX-270-810-IPDFPDFPDF820664554515 to 12703205000.139068330.0282.2421.1378.417.13870127.5
HDB-VHX-300-900-IPDFPDFPDF900729604915 to 13003225000.169075000.0282.2421.1378.417.13817127.5
HDB-VHX-315-945-IPDFPDFPDF945765635115 to 13153236250.159078750.0291.9921.1378.417.13888127.5
HDB-VHX-500-1000-IPDFPDFPDF10008101008110 to 15002250000.219083330.0281.3723.6378.420.1376810
HDB-VHX-350-1050-IPDFPDFPDF1050851705715 to 13503262500.189087500.0291.9921.1378.417.13888127.5
HDB-VHX-360-1080-IPDFPDFPDF1080875725815 to 13603270000.169090000.02101.7421.1378.417.131015127.5
HDB-VHX-375-1125-IPDFPDFPDF1125911756115 to 13753281250.189093750.02101.7421.1378.417.131015127.5
HDB-VHX-600-1200-IPDFPDFPDF12009721209710 to 16002300000.2390100000.0394.3723.6378.420.1382910
HDB-VHX-400-1200-IPDFPDFPDF1200972806515 to 14003300000.290100000.02101.7421.1378.417.131015127.5
HDB-VHX-500-1500-IPDFPDFPDF150012151008115 to 15003375000.2190125000.02121.2423.6378.420.131160157.5
HDB-VHX-600-1800-IPDFPDFPDF180014581209715 to 16003450000.2390150000.03140.7423.6378.420.131220157.5
Note: For Propane gas, turndown is 60% of stated natural gas turndown.