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.


Select An Efficiency:

81%80%

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 230V
HDB-HHX 225-450-IPDFPDFPDFPDF4503644536.4510 to 12252112500.076056250.0240.6335.1378.417.1562385
HDB-HHX 250-500-IPDFPDFPDFPDF5004055040.510 to 12502125000.086062500.0240.6335.1378.417.1562385
HDB-HHX 270-540-IPDFPDFPDFPDF5404375443.7410 to 12702135000.126067500.0340.6335.1378.417.1566985
HDB-HHX 300-600-IPDFPDFPDFPDF6004866048.610 to 13002150000.156075000.0440.6335.1378.417.1566985
HDB-HHX 315-630-IPDFPDFPDFPDF6305106351.0310 to 13152157500.196078750.0540.6335.1378.417.1571585
HDB-HHX 225-675-IPDFPDFPDFPDF6755474536.4515 to 12253168750.076084380.0260.1335.1378.417.15935127.5
HDB-HHX 350-700-IPDFPDFPDFPDF7005677056.710 to 13502175000.246087500.0640.6335.1378.417.1571585
HDB-HHX 700-700-IPDFPDF7005677056.710 to 17001175000.2210052500.028578
HDB-HHX 360-720-IPDFPDFPDFPDF7205837258.3210 to 13602180000.36090000.0740.6335.1378.417.1575085
HDB-HHX 375-750-IPDFPDFPDFPDF7506087560.7510 to 13752187500.336093750.0840.6335.1378.417.1576185
HDB-HHX 400-800-IPDFPDFPDFPDF8006488064.810 to 14002200000.3860100000.0940.6335.1378.417.1576185
HDB-HHX 800-800-IPDFPDF8006488064.810 to 18001200000.299066670.038578
HDB-HHX 270-810-IPDFPDFPDFPDF8106565443.7415 to 12703202500.1260101250.0360.1335.1378.417.151003.5127.5
HDB-HHX 300-900-IPDFPDFPDFPDF9007296048.615 to 13003225000.1560112500.0460.1335.1378.417.15987127.5
HDB-HHX 900-900-IPDFPDF9007299072.910 to 19001225000.378084380.0588210
HDB-HHX 315-945-IPDFPDFPDFPDF9457656351.0315 to 13153236250.1960118130.0560.1335.1378.417.151056127.5
HDB-HHX 500-1000-IPDFPDFPDFPDF10008101008110 to 15002250000.7360125000.1945.6341.6478.42081610
HDB-HHX 1000-1000-IPDFPDF10008101008110 to 110001250000.579083330.0692110
HDB-HHX 250-1000-IPDFPDFPDFPDF10008105040.520 to 12504250000.0860125000.0279.6335.1378.417.1512461610
HDB-HHX 350-1050-IPDFPDFPDFPDF10508507056.715 to 13503262500.2460131250.0660.1335.1378.417.151056127.5
HDB-HHX 270-1080-IPDFPDFPDFPDF10808755443.7420 to 12704270000.1260135000.0379.6335.1378.417.1513381610
HDB-HHX 360-1080-IPDFPDFPDFPDF10808757258.3215 to 13603270000.360135000.0760.1335.1378.417.151125127.5
HDB-HHX 1100-1100-IPDFPDF110089111089.110 to 111001275000.698597060.0992110
HDB-HHX 375-1125-IPDFPDFPDFPDF11259117560.7515 to 13753281250.3360140630.0860.1335.1378.417.151125127.5
HDB-HHX 1200-1200-IPDFPDF120097212097.210 to 112001300000.8270128570.1592110
HDB-HHX 600-1200-IPDFPDFPDFPDF120097212097.210 to 16002300001.3160150000.3245.6348.1478.42090710
HDB-HHX 400-1200-IPDFPDFPDFPDF12009728064.815 to 14003300000.3860150000.0960.1335.1378.417.151125127.5
HDB-HHX 1250-1250-IPDFPDF12501013125101.2510 to 112501312500.8965144230.1992110
HDB-HHX 270-1350-IPDFPDFPDFPDF135010945443.7425 to 12705337500.1260168750.0399.1335.1378.417.151672.520
HDB-HHX 700-1400-IPDFPDF140011347056.720 to 17002350000.22100105000.02157116
HDB-HHX 350-1400-IPDFPDFPDFPDF140011347056.720 to 13504350000.2460175000.0679.6335.1378.417.1513961610
HDB-HHX 360-1440-IPDFPDFPDFPDF144011667258.3220 to 13604360000.360180000.0779.6335.1378.417.1515001610
HDB-HHX 500-1500-IPDFPDFPDFPDF150012151008115 to 15003375000.7360187500.1967.6341.6478.4201237157.5
HDB-HHX 375-1500-IPDFPDFPDFPDF150012157560.7520 to 13754375000.3360187500.0879.6335.1378.417.1514881610
HDB-HHX 800-1600-IPDFPDF160012968064.820 to 18002400000.2990133330.03157116
HDB-HHX 400-1600-IPDFPDFPDFPDF160012968064.820 to 14004400000.3860200000.0979.6335.1378.417.1514881610
HDB-HHX 350-1750-IPDFPDFPDFPDF175014187056.725 to 13505437500.2460218750.0699.1335.1378.417.1517372012.5
HDB-HHX 900-1800-IPDFPDF180014589072.920 to 19002450000.3780168750.05161715
HDB-HHX 600-1800-IPDFPDFPDFPDF1800145812097.215 to 16003450001.3160225000.3267.6348.1478.4201015207.5
HDB-HHX 360-1800-IPDFPDFPDFPDF180014587258.3225 to 13605450000.360225000.0799.1335.1378.417.15187520
HDB-HHX 375-1875-IPDFPDFPDFPDF187515197560.7525 to 13755468750.3360234380.0899.1335.1378.417.1518522012.5
HDB-HHX 500-2000-IPDFPDFPDFPDF200016201008120 to 15004500000.7360250000.1989.6341.6478.420164520
HDB-HHX 400-2000-IPDFPDFPDFPDF200016208064.825 to 14005500000.3860250000.0999.1335.1378.417.1518522012.5
HDB-HHX 1000-2000-IPDFPDF200016201008120 to 110002500000.5790166670.06168620
HDB-HHX 700-2100-IPDFPDF210017017056.730 to 17003525000.22100157500.02224324
HDB-HHX 1100-2200-IPDFPDF2200178211089.120 to 111002550000.6985194120.09168620
HDB-HHX 800-2400-IPDFPDF240019448064.830 to 18003600000.2990200000.03224324
HDB-HHX 1200-2400-IPDFPDF2400194412097.220 to 112002600000.8270257140.15168620
HDB-HHX 600-2400-IPDFPDFPDFPDF2400194412097.220 to 16004600001.3160300000.3289.6348.1478.420177120
HDB-HHX 500-2500-IPDFPDFPDFPDF250020251008125 to 15005625000.7360312500.19111.6341.6478.420206025
HDB-HHX 1250-2500-IPDFPDF25002025125101.2520 to 112502625000.8965288460.19168620
HDB-HHX 900-2700-IPDFPDF270021879072.930 to 19003675000.3780253130.05231830
HDB-HHX 700-2800-IPDFPDF280022687056.740 to 17004700000.22100210000.02299032
HDB-HHX 1000-3000-IPDFPDF300024301008130 to 110003750000.5790250000.06243530
HDB-HHX 600-3000-IPDFPDFPDFPDF3000243012097.225 to 16005750001.3160375000.32111.6348.1478.420225225
HDB-HHX 800-3200-IPDFPDF320025928064.840 to 18004800000.2990266670.03299032
HDB-HHX 1100-3300-IPDFPDF3300267311089.130 to 111003825000.6985291180.09243530
HDB-HHX 900-3600-IPDFPDF360029169072.940 to 19004900000.3780337500.05309040
HDB-HHX 1200-3600-IPDFPDF3600291612097.230 to 112003900000.8270385710.15243530
HDB-HHX 1250-3750-IPDFPDF37503038125101.2530 to 112503937500.8965432690.19243530
HDB-HHX 1000-4000-IPDFPDF400032401008140 to 1100041000000.5790333330.06324640
HDB-HHX 1100-4400-IPDFPDF4400356411089.140 to 1110041100000.6985388240.09324640
HDB-HHX 1200-4800-IPDFPDF4800388812097.240 to 1120041200000.8270514290.15324640
HDB-HHX 1250-5000-IPDFPDF50004050125101.2540 to 1125041250000.8965576920.19324640
Note: For Propane gas, turndown is 60% of stated natural gas turndown.

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 230V
HDB-HHX 225-450-IPDFPDFPDFPDF450360453610 to 12252166670.066055560.0136.435791762385
HDB-HHX 250-500-IPDFPDFPDFPDF500400504010 to 12502185190.086061730.0136.435791762385
HDB-HHX 270-540-IPDFPDFPDFPDF540432544310 to 12702200000.116066670.0136.435791766985
HDB-HHX 300-600-IPDFPDFPDFPDF600480604810 to 13002222220.136074070.0236.435791766985
HDB-HHX 315-630-IPDFPDFPDFPDF630504635010 to 13152233330.176077780.0236.435791771585
HDB-HHX 225-675-IPDFPDFPDFPDF675540453615 to 12253250000.066083330.0153.8357917756127.5
HDB-HHX 350-700-IPDFPDFPDFPDF700560705610 to 13502259260.26086420.0336.435791771585
HDB-HHX 700-700-IPDFN/aN/aPDFPDF700560705610 to 17001259260.3110051850.0230.674878.81198578
HDB-HHX 360-720-I7205767257.610 to 13602266660.246088880.0375085
HDB-HHX 375-750-IPDFPDFPDFPDF750600756010 to 13752277780.266092590.0436.435791776185
HDB-HHX 400-800-IPDFPDFPDFPDF800640806410 to 14002296300.36098770.0436.435791776185
HDB-HHX 800-800-IPDFN/aN/aPDFPDF800640806410 to 18001296300.399065840.0230.674878.81198578
HDB-HHX 270-810-I8106488164.815 to 12703300000.116010000.50.011003.5127.5
HDB-HHX 900-900-IPDFN/aN/aN/aPDF900720907210 to 19001333330.488083330.0430.674878.811988210
HDB-HHX 300-900-IPDFPDFPDFPDF900720604815 to 13003333330.1360111110.0253.8357917987127.5
HDB-HHX 315-945-IPDFPDFPDFPDF945756635015 to 13153350000.1760116670.0253.83579171056127.5
HDB-HHX 250-1000-IPDFPDFPDFPDF1000800504020 to 12504370370.0860123460.0171.235791712121610
HDB-HHX 1000-1000-IPDFN/aN/aPDFPDF10008001008010 to 110001370370.719082300.0430.748792292110
HDB-HHX 500-1000-IPDFPDFPDFPDF10008001008010 to 15001370370.5660123460.2745.6741.579.051981610
HDB-HHX 350-1050-IPDFPDFPDFPDF1050840705615 to 13503388890.260129630.0353.83579171056127.5
HDB-HHX 360-1080-IPDFPDFPDFPDF108086410886.415 to 13603400000.2460133330.0353.83579171125127.5
HDB-HHX 270-1080-I108086410886.420 to 12704400000.1160133340.0113381610
HDB-HHX 1100-1100-IPDFN/aN/aPDFPDF11008801108810 to 111001407410.848595860.0630.674878.811992110
HDB-HHX 375-1125-IPDFPDFPDFPDF1125900756015 to 13753416670.2660138890.0453.83579171125127.5
HDB-HHX 400-1200-IPDFPDFPDFPDF1200960806415 to 14003444440.360148150.0453.83579171125127.5
HDB-HHX 1200-1200-IPDFN/aN/aPDFPDF12009601209610 to 112001444440.9970126980.130.748792292110
HDB-HHX 600-1200-IPDFPDFPDFPDF12009601209610 to 16002444440.9460148150.1245.674879.051990710
HDB-HHX 1250-1250-IPDFN/aN/aPDFPDF1250100012510010 to 112501462961.0765142450.1230.748792292110
HDB-HHX 270-1350-I1350108013510825 to 12705500000.116016667.50.011672.520
HDB-HHX 350-1400-IPDFPDFPDFPDF14001120705620 to 13504518520.260172840.0371.235791713961610
HDB-HHX 700-1400-IPDFN/aN/aPDFPDF14001120705620 to 17002518520.31100103700.0259.674878.8119157116
HDB-HHX 360-1440-I14401152144115.220 to 13604533320.2460177760.0315001610
HDB-HHX 500-1500-IPDFPDFPDFPDF150012001008015 to 15003555560.5660185190.0767.7541.579221237157.5
HDB-HHX 375-1500-IPDFPDFPDFPDF15001200756020 to 13754555560.2660185190.0471.235791714881610
HDB-HHX 800-1600-IPDFN/aN/aPDFPDF16001280806420 to 18002592590.3990131690.0259.674878.8119157116
HDB-HHX 400-1600-IPDFPDFPDFPDF16001280806420 to 14004592590.360197530.0471.235791714881610
HDB-HHX 350-1750-IPDFPDFPDFPDF17501400705625 to 13505648150.260216050.0388.535791717372012.5
HDB-HHX 600-1800-IPDFPDFPDFPDF180014401209615 to 16003666670.9480222220.1267.754879221015207.5
HDB-HHX 900-1800-IPDFN/aN/aPDFPDF18001440907220 to 19002666670.4960166670.0459.674878.8119161715
HDB-HHX 360-1800-I1800144018014425 to 13605666650.2460222200.03187520
HDB-HHX 375-1875-IPDFPDFPDFPDF18751500756025 to 13755694440.2660231480.0488.535791718522012.5
HDB-HHX 500-2000-IPDFPDFPDFPDF200016001008020 to 15004740740.5660246910.0789.6741.579.0519164520
HDB-HHX 400-2000-IPDFPDFPDFPDF20001600806425 to 14005740740.360246910.0488.535791718522012.5
HDB-HHX 1000-2000-IPDFN/aN/aPDFPDF200016001008020 to 110002740740.7190164610.0459.75487922168620
HDB-HHX 700-2100-IPDFN/aN/aPDFPDF21001680705630 to 17003777780.31100155560.0288.674878.8119224324
HDB-HHX 1100-2200-IPDFN/aN/aPDFPDF220017601108820 to 111002814810.8485191720.0659.674878.8119168620
HDB-HHX 1200-2400-IPDFN/aN/aPDFPDF240019201209620 to 112002888890.9970253970.159.75487922168620
HDB-HHX 800-2400-IPDFN/aN/aPDFPDF24001920806430 to 18003888890.3990197530.0288.674878.8119224324
HDB-HHX 600-2400-IPDFPDFPDFPDF240019201209620 to 16004888890.9460296300.1289.674879.0519177120
HDB-HHX 500-2500-IPDFPDFPDFPDF250020001008025 to 15005925930.5660308640.07111.6741.579.0519206025
HDB-HHX 1250-2500-IPDFN/aN/aPDFPDF2500200012510020 to 112502925931.0765284900.1259.75487922168620
HDB-HHX 900-2700-IPDFN/aN/aN/aPDF27002160907230 to 190031000000.4880250000.0488.674878.8119231830
HDB-HHX 700-2800-IPDFN/aN/aPDFPDF28002240705640 to 170041037040.31100207410.02117.674878.8119299032
HDB-HHX 600-3000-IPDFPDFPDFPDF300024001209625 to 160051111110.9460370370.12111.674879.0519225225
HDB-HHX 1000-3000-IPDFN/aN/aPDFPDF300024001008030 to 1100031111110.7190246910.0488.75487922243530
HDB-HHX 800-3200-IPDFN/aN/aPDFPDF32002560806440 to 180041185190.3990263370.02117.674878.8119299032
HDB-HHX 1100-3300-IPDFN/aN/aPDFPDF330026401108830 to 1110031222220.8485287580.0688.674878.8119243530
HDB-HHX 900-3600-IPDFN/aN/aN/aPDF36002880907240 to 190041333330.4880333330.04117.674878.8119309040
HDB-HHX 1200-3600-IPDFN/aN/aPDFPDF360028801209630 to 1120031333330.9970380950.188.75487922243530
HDB-HHX 1250-3750-IPDFN/aN/aPDFPDF3750300012510030 to 1125031388891.0765427350.1288.75487922243530
HDB-HHX 1000-4000-IPDFN/aN/aPDFPDF400032001008040 to 1100041481480.7190329220.04117.75487922324640
HDB-HHX 1100-4400-IPDFN/aN/aPDFPDF440035201108840 to 1110041629630.8485383440.06117.674878.8119324640
HDB-HHX 1200-4800-IPDFN/aN/aPDFPDF480038401209640 to 1120041777780.9970507940.1117.75487922324640
HDB-HHX 1250-5000-IPDFN/aN/aPDFPDF5000400012510040 to 1125041851851.0765569800.12117.75487922324640
Note: For Propane gas, turndown is 60% of stated natural gas turndown.