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 NumberPDF  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 CFMMax APD @ Min RiseMax Temp RiseMin CFMMin APD @ Max RiseDim ADim BDim CDim DWeight (Lbs.)
HDB-VHX-225-450-TPDFPDFPDFPDF450360453610 to 12252166670.329037040.0248.861978.8117512
HDB-VHX-250-500-TPDFPDFPDFPDF500400504010 to 12502185190.399041150.0248.861978.8117512
HDB-VHX-270-540-TPDFPDFPDFPDF540432544310 to 12702200000.369044440.0255.361978.8117552
HDB-VHX-300-600-TPDFPDFPDFPDF600480604810 to 13002222220.449049380.0355.361978.8117552
HDB-VHX-315-630-TPDFPDFPDFPDF630504635010 to 13152233330.49051850.0261.871978.8117594
HDB-VHX-225-675-TPDFPDFPDFPDF675540453615 to 12253250000.329055560.0265.121978.8117718
HDB-VHX-350-700-TPDFPDFPDFPDF700560705610 to 13502259260.489057610.0361.871978.8117594
HDB-VHX-375-750-TPDFPDFPDFPDF750600756010 to 13752277780.469061730.0368.371978.8117642
HDB-VHX-400-800-TPDFPDFPDFPDF800640806410 to 14002296300.529065840.0368.371978.8117642
HDB-VHX-300-900-TPDFPDFPDFPDF900720604815 to 13003333330.449074070.0382.241978.8117773
HDB-VHX-315-945-TPDFPDFPDFPDF945756635015 to 13153350000.49077780.0291.991978.8117836
HDB-VHX-500-1000-TPDFPDFPDFPDF10008001008010 to 15002370370.577598770.0581.3723.6378.8120733
HDB-VHX-250-1000-TPDFPDFPDFPDF1000800504020 to 12504370370.399082300.0288.741978.8117919
HDB-VHX-350-1050-TPDFPDFPDFPDF1050840705615 to 13503388890.489086420.0391.991978.8117836
HDB-VHX-400-1200-TPDFPDFPDFPDF1200960806415 to 14003444440.529098770.03101.741978.8117903
HDB-VHX-600-1200-TPDFPDFPDFPDF120010001209610 to 16002444440.6175118520.0594.3723.6378.8120773
HDB-VHX-500-1500-TPDFPDFPDFPDF150012001008015 to 15003555560.5775148150.05121.2423.6378.81201076
HDB-VHX-600-1800-TPDFPDFPDFPDF180014401209615 to 16003666670.6175177780.05140.7423.6378.81201136
HDB-VHX-225-450-T-X2PDFPDFPDF900720907220 to 12254166670.6418037040.0448.8690.7178.81171386
HDB-VHX-250-500-T-X2PDFPDFPDF10008001008020 to 12504185190.7818041150.0448.8690.7178.81171392
HDB-VHX-270-540-T-X2PDFPDFPDF10808641088620 to 12704200000.7218044440.0455.3690.7178.81171480
HDB-VHX-300-600-T-X2PDFPDFPDF12009601209620 to 13004222220.8818049380.0655.3690.7178.81171488
HDB-VHX-315-630-T-X2PDFPDFPDF1260100812610020 to 13154233330.818051850.0461.8790.7178.81171580
HDB-VHX-225-675-T-X2PDF13501080907230 to 12256250000.6418055560.0465.1290.7178.81171750
HDB-VHX-350-700-T-X2PDFPDFPDF1400112014011220 to 13504259260.9618057610.0661.8790.7178.81171588
HDB-VHX-375-750-T-X2PDFPDFPDF1500120015012020 to 13754277780.9218061730.0668.3790.7178.81171698
HDB-VHX-400-800-T-X2PDFPDFPDF1600128016012820 to 14004296301.0418065840.0668.3790.7178.81171698
HDB-VHX-300-900-T-X2PDF180014401209630 to 13006333330.8818074070.0682.2490.7178.81171892
HDB-VHX-315-945-T-X2PDF1890151212610030 to 13156350000.818077780.0491.9990.7178.81172042
HDB-VHX-500-1000-T-X2PDFPDFPDF2000160020016020 to 15004370371.1415098770.181.3798.8678.81202208
HDB-VHX-250-1000-T-X2PDF200016001008040 to 12508370370.7818082300.0488.7490.7178.81172114
HDB-VHX-350-1050-T-X2PDF2100168014011230 to 13506388890.9618086420.0691.9990.7178.81171852
HDB-VHX-600-1200-T-X2PDFPDFPDF2400200024019220 to 16004444441.22150118520.194.3798.8678.81201932
HDB-VHX-400-1200-T-X2PDF2400192016012830 to 14006444441.0418098770.06101.7490.7178.81172042
HDB-VHX-500-1500-T-X2PDF3000240020016030 to 15006555561.14150148150.1121.2498.8678.81202648
HDB-VHX-600-1800-T-X2PDF3600288024019230 to 16006666671.22150177780.1140.7498.8678.81203008
Note: For Propane gas, turndown is 60% of stated natural gas turndown.