– 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.

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

Note: You must be logged in to view CAD, Gas Train and Wiring Diagram files.
Model NumberPDF  Alt PDF  PDF of Gas TrainPDF of Wiring DiagramMax Input MBHMax Output MBHMin Input MBHMin Output MBHNat. Gas Turndown RatioMax CFMMax APD @ Min RiseMax Temp RiseMin CFMMin APD @ Max RiseDim ADim BDim CDim DWeight (Lbs.)Total Amps 120VTotal Amps 208V 230V
HDB-VHX-225-450PDFPDFPDFPDF450360453610 to 1166670.329037040.0248.861978.811751285
HDB-VHX-250-500PDFPDFPDFPDF500400504010 to 1185190.399041150.0248.861978.811751285
HDB-VHX-270-540PDFPDFPDFPDF540432544310 to 1200000.369044440.0255.361978.811755285
HDB-VHX-300-600PDFPDFPDFPDF600480604810 to 1222220.449049380.0355.361978.811755285
HDB-VHX-315-630PDFPDFPDFPDF630504635010 to 1233330.49051850.0261.871978.811759485
HDB-VHX-225-675PDFPDFPDFPDF675540453615 to 1250000.329055560.0265.121978.8117718127.5
HDB-VHX-350-700PDFPDFPDFPDF700560705610 to 1259260.489057610.0361.871978.811759485
HDB-VHX-375-750PDFPDFPDFPDF750600756010 to 1277780.469061730.0368.371978.811764285
HDB-VHX-400-800PDFPDFPDFPDF800640806410 to 1296300.529065840.0368.371978.811764285
HDB-VHX-300-900PDFPDFPDFPDF900720604815 to 1333330.449074070.0382.241978.8117773127.5
HDB-VHX-315-945PDFPDFPDFPDF945756635015 to 1350000.49077780.0291.991978.8117836127.5
HDB-VHX-500-1000PDFPDFPDFPDF10008001008010 to 1370370.577598770.0581.3723.6378.812073310
HDB-VHX-250-1000PDFPDFPDFPDF1000800504020 to 1370370.399082300.0288.741978.81179191610
HDB-VHX-350-1050PDFPDFPDFPDF1050840705615 to 1388890.489086420.0391.991978.8117836127.5
HDB-VHX-600-1200PDFPDFPDFPDF120010001209610 to 1444440.6175118520.0594.3723.6378.812077310
HDB-VHX-400-1200PDFPDFPDFPDF1200960806415 to 1444440.529098770.03101.741978.8117903127.5
HDB-VHX-500-1500PDFPDFPDFPDF150012001008015 to 1555560.5775148150.05121.2423.6378.81201076157.5
HDB-VHX-600-1800PDFPDFPDFPDF180014401209615 to 1666670.6175177780.05140.7423.6378.81201136157.5
Note: For Propane gas, turndown is 60% of stated natural gas turndown.
Model NumberPDF  Alt PDF  PDF of Gas TrainPDF of Wiring DiagramMax Input MBHMax Output MBHMin Input MBHMin Output MBHNat. Gas Turndown RatioMax CFMMax APD @ Min RiseMax Temp RiseMin CFMMin APD @ Max RiseDim ADim BDim CDim DWeight (Lbs.)Total Amps 120VTotal Amps 208V 230V
HDB-VHX-225-450-X2PDFPDFPDF900720907220 to 1166670.6418037040.0448.8649.978.811713861610
HDB-VHX-250-500-X2PDFPDFPDF10008001008020 to 1185190.7818041150.0448.8649.978.811713921610
HDB-VHX-270-540-X2PDFPDFPDF10808641088620 to 1200000.7218044440.0455.3649.978.811714801610
HDB-VHX-300-600-X2PDFPDFPDF12009601209620 to 1222220.8818049380.0655.3649.978.811714881610
HDB-VHX-315-630-X2PDFPDFPDF1260100812610020 to 1233330.818051850.0461.8749.978.811715801610
HDB-VHX-225-675-X2PDF13501080907230 to 1250000.6418055560.0465.1249.978.811717502415
HDB-VHX-350-700-X2PDFPDFPDF1400112014011220 to 1259260.9618057610.0661.8749.978.811715881610
HDB-VHX-375-750-X2PDFPDFPDF1500120015012020 to 1277780.9218061730.0668.3749.978.811716981610
HDB-VHX-400-800-X2PDFPDFPDF1600128016012820 to 1296301.0418065840.0668.3749.978.811716981610
HDB-VHX-300-900-X2PDF180014401209630 to 1333330.8818074070.0682.2449.978.811718922415
HDB-VHX-315-945-X2PDF1890151212610030 to 1350000.818077780.0491.9949.978.811720422415
HDB-VHX-500-1000-X2PDFPDFPDF2000160020016020 to 1370371.1415098770.181.3759.2578.812022082010
HDB-VHX-250-1000-X2PDF200016001008040 to 1370370.7818082300.0488.7449.978.811721143220
HDB-VHX-350-1050-X2PDF2100168014011230 to 1388890.9618086420.0691.9949.978.811718522415
HDB-VHX-600-1200-X2PDFPDFPDF2400200024019220 to 1444441.22150118520.194.3759.2578.812019322010
HDB-VHX-400-1200-X2PDF2400192016012830 to 1444441.0418098770.06101.7449.978.811720422415
HDB-VHX-500-1500-X2PDF3000240020016030 to 1555561.14150148150.1121.2459.2578.812026483015
HDB-VHX-600-1800-X2PDF3600288024019230 to 1666671.22150177780.1140.7459.2578.812030083015
Note: For Propane gas, turndown is 60% of stated natural gas turndown.