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 230V
HDB-HHX-180-360-TPDFPDFPDFPDF3602923629.1610 to 1180290000.046045000.0140.6335.1378.417.1565185
HDB-HHX-200-400-TPDFPDFPDFPDF4003244032.410 to 12002100000.046050000.0140.6335.1378.417.1565185
HDB-HHX 225-450-TPDFPDFPDFPDF4503644536.4510 to 12252112500.076056250.0240.6335.1378.417.1565185
HDB-HHX 250-500-TPDFPDFPDFPDF5004055040.510 to 12502125000.086062500.0240.6335.1378.417.1565185
HDB-HHX 270-540-TPDFPDFPDFPDF5404375443.7410 to 12702135000.126067500.0340.6335.1378.417.1569785
HDB-HHX-180-540-TPDFPDFPDFPDF5404373629.1615 to 11803135000.046067500.0160.1335.1378.417.15977127.5
HDB-HHX-200-600-TPDFPDFPDFPDF6004864032.415 to 12003150000.046075000.0160.1335.1378.417.15977127.5
HDB-HHX 300-600-TPDFPDFPDFPDF6004866048.610 to 13002150000.156075000.0440.6335.1378.417.1569785
HDB-HHX 315-630-TPDFPDFPDFPDF6305106351.0310 to 13152157500.196078750.0540.6335.1378.417.1574385
HDB-HHX 225-675-TPDFPDFPDFPDF6755474536.4515 to 12253168750.076084380.0260.1335.1378.417.15977127.5
HDB-HHX 350-700-TPDFPDFPDFPDF7005677056.710 to 13502175000.246087500.0640.6335.1378.417.1574385
HDB-HHX 700-700-TPDFPDFPDF7005677056.710 to 17001175000.2210052500.0230.634878.4198328
HDB-HHX 360-720-TPDFPDFPDFPDF7205837258.3210 to 13602180000.36090000.0740.6335.1378.417.1579285
HDB-HHX-180-720-TPDFPDFPDFPDF7205833629.1620 to 11804180000.046090000.0179.6335.1378.417.1513021610
HDB-HHX 250-750-TPDFPDFPDFPDF7506085040.515 to 12503187500.086093750.0260.1335.1378.417.15977127.5
HDB-HHX 375-750-TPDFPDFPDFPDF7506087560.7510 to 13752187500.336093750.0840.6335.1378.417.1578985
HDB-HHX 400-800-TPDFPDFPDFPDF8006488064.810 to 14002200000.3860100000.0940.6335.1378.417.1578985
HDB-HHX-200-800-TPDFPDFPDFPDF8006484032.420 to 12004200000.0460100000.0179.6335.1378.417.1513021610
HDB-HHX 800-800-TPDFPDFPDF8006488064.810 to 18001200000.299066670.0330.634878.4198328
HDB-HHX 270-810-TPDFPDFPDFPDF8106565443.7415 to 12703202500.1260101250.0360.1335.1378.417.151046127.5
HDB-HHX 225-900-TPDFPDFPDFPDF9007294536.4520 to 12254225000.0760112500.0279.6335.1378.417.1513091610
HDB-HHX 300-900-TPDFPDFPDFPDF9007296048.615 to 13003225000.1560112500.0460.1335.1378.417.151031127.5
HDB-HHX 900-900-TPDFPDFPDF9007299072.910 to 19001225000.378084380.0530.634878.41985710
HDB-HHX-180-900-TPDFPDFPDFPDF9007293629.1625 to 11805225000.0460112500.0199.1335.1378.417.1516372012.5
HDB-HHX 315-945-TPDFPDFPDFPDF9457656351.0315 to 13153236250.1960118130.0560.1335.1378.417.151100127.5
HDB-HHX 500-1000-TPDFPDFPDFPDF10008101008110 to 15002250000.7370107140.1345.6341.6478.42084710
HDB-HHX-200-1000-TPDFPDFPDFPDF10008104032.425 to 12005250000.0460125000.0199.1335.1378.417.1516372012.5
HDB-HHX 1000-1000-TPDFPDFPDF10008101008110 to 110001250000.579083330.0630.634878.41989610
HDB-HHX 250-1000-TPDFPDFPDFPDF10008105040.520 to 12504250000.0860125000.0279.6335.1378.417.1513091610
HDB-HHX 350-1050-TPDFPDFPDFPDF10508507056.715 to 13503262500.2460131250.0660.1335.1378.417.151100127.5
HDB-HHX 270-1080-TPDFPDFPDFPDF10808755443.7420 to 12704270000.1260135000.0379.6335.1378.417.1513941610
HDB-HHX 360-1080-TPDFPDFPDFPDF10808757258.3215 to 13603270000.360135000.0760.1335.1378.417.151169127.5
HDB-HHX 1100-1100-TPDFPDFPDF110089111089.110 to 111001275000.698597060.0930.634878.41989610
HDB-HHX 375-1125-TPDFPDFPDFPDF11259117560.7515 to 13753281250.3360140630.0860.1335.1378.417.151188127.5
HDB-HHX 225-1125-TPDFPDFPDFPDF11259114536.4525 to 12255281250.0760140630.0299.1335.1378.417.15163720
HDB-HHX 1200-1200-TPDFPDFPDF120097212097.210 to 112001300000.8270128570.1530.634878.41989410
HDB-HHX 600-1200-TPDFPDFPDFPDF120097212097.210 to 16002300001.3180112500.1945.6348.1478.42093810
HDB-HHX 400-1200-TPDFPDFPDFPDF12009728064.815 to 14003300000.3860150000.0960.1335.1378.417.151169127.5
HDB-HHX 300-1200-TPDFPDFPDFPDF12009726048.620 to 13004300000.1560150000.0479.6335.1378.417.1514071610
HDB-HHX 250-1250-TPDFPDFPDFPDF125010135040.525 to 12505250000.0860125000.0299.1335.1378.417.15160420
HDB-HHX 1250-1250-TPDFPDFPDF12501013125101.2510 to 112501312500.8965144230.1930.634878.41989610
HDB-HHX 315-1260-TPDFPDFPDFPDF126010216351.0320 to 13154315000.1960157500.0579.6335.1378.417.1514951610
HDB-HHX 270-1350-TPDFPDFPDFPDF135010945443.7425 to 12705337500.1260168750.0399.1335.1378.417.15175220
HDB-HHX 700-1400-TPDFPDFPDF140011347056.720 to 17002350000.22100105000.0259.634878.419151516
HDB-HHX 350-1400-TPDFPDFPDFPDF140011347056.720 to 13504350000.2460175000.0679.6335.1378.417.1514591610
HDB-HHX 360-1440-TPDFPDFPDFPDF144011667258.3220 to 13604360000.360180000.0779.6335.1378.417.1515631610
HDB-HHX 500-1500-TPDFPDFPDFPDF150012151008115 to 15003375000.7370160710.1367.6341.6478.4201286157.5
HDB-HHX 375-1500-TPDFPDFPDFPDF150012157560.7520 to 13754375000.3360187500.0879.6335.1378.417.1515511610
HDB-HHX 300-1500-TPDFPDFPDFPDF150012156048.625 to 13005375000.1560187500.0499.1335.1378.417.15178920
HDB-HHX 315-1575-TPDFPDFPDFPDF157512766351.0325 to 13155393750.1960196880.0599.1335.1378.417.15186920
HDB-HHX 800-1600-TPDFPDFPDF160012968064.820 to 18002400000.2990133330.0359.634878.419151516
HDB-HHX 400-1600-TPDFPDFPDFPDF160012968064.820 to 14004400000.3860200000.0979.6335.1378.417.1515511610
HDB-HHX 350-1750-TPDFPDFPDFPDF175014187056.725 to 13505437500.2460218750.0699.1335.1378.417.1518162012.5
HDB-HHX 900-1800-TPDFPDFPDF180014589072.920 to 19002450000.3780168750.0559.634878.419156115
HDB-HHX 600-1800-TPDFPDFPDFPDF1800145812097.215 to 16003450001.3180168750.1967.6348.1478.4201423207.5
HDB-HHX 360-1800-TPDFPDFPDFPDF180014587258.3225 to 13605450000.360225000.0799.1335.1378.417.15195420
HDB-HHX 375-1875-TPDFPDFPDFPDF187515197560.7525 to 13755468750.3360234380.0899.1335.1378.417.1519312012.5
HDB-HHX 500-2000-TPDFPDFPDFPDF200016201008120 to 15004500000.7370214290.1389.6341.6478.420170820
HDB-HHX 400-2000-TPDFPDFPDFPDF200016208064.825 to 14005500000.3860250000.0999.1335.1378.417.1519312012.5
HDB-HHX 1000-2000-TPDFPDFPDF200016201008120 to 110002500000.5790166670.0659.634878.419163020
HDB-HHX 700-2100-TPDFPDFPDF210017017056.730 to 17003525000.22100157500.0288.634878.419214624
HDB-HHX 1100-2200-TPDFPDFPDF2200178211089.120 to 111002550000.6985194120.0959.634878.419163020
HDB-HHX 800-2400-TPDFPDFPDF240019448064.830 to 18003600000.2990200000.0388.634878.419214624
HDB-HHX 1200-2400-TPDFPDFPDF2400194412097.220 to 112002600000.8270257140.1559.634878.419163020
HDB-HHX 600-2400-TPDFPDFPDFPDF2400194412097.220 to 16004600001.3180225000.1989.6348.1478.420164320
HDB-HHX 500-2500-TPDFPDFPDFPDF250020251008125 to 15005625000.7370267860.13111.6341.6478.420196225
HDB-HHX 1250-2500-TPDFPDFPDF25002025125101.2520 to 112502625000.8965288460.1959.634878.419163020
HDB-HHX 900-2700-TPDFPDFPDF270021879072.930 to 19003675000.3780253130.0588.634878.419222130
HDB-HHX 700-2800-TPDFPDFPDF280022687056.740 to 17004700000.22100210000.02117.634878.419283332
HDB-HHX 1000-3000-TPDFPDFPDF300024301008130 to 110003750000.5790250000.0688.634878.419233830
HDB-HHX 600-3000-TPDFPDFPDFPDF3000243012097.225 to 16005750001.3180281250.19111.6348.1478.420211825
HDB-HHX 800-3200-TPDFPDFPDF320025928064.840 to 18004800000.2990266670.03117.634878.419283332
HDB-HHX 1100-3300-TPDFPDFPDF3300267311089.130 to 111003825000.6985291180.0988.634878.419233830
HDB-HHX 900-3600-TPDFPDFPDF360029169072.940 to 19004900000.3780337500.05117.634878.419293340
HDB-HHX 1200-3600-TPDFPDFPDF3600291612097.230 to 112003900000.8270385710.1588.634878.419233830
HDB-HHX 1250-3750-TPDFPDFPDF37503038125101.2530 to 112503937500.8965432690.1988.634878.419233830
HDB-HHX 1000-4000-TPDFPDFPDF400032401008140 to 1100041000000.5790333330.06117.634878.419308940
HDB-HHX 1100-4400-TPDFPDFPDF4400356411089.140 to 1110041100000.6985388240.09117.634878.419308940
HDB-HHX 1200-4800-TPDFPDFPDF4800388812097.240 to 1120041200000.8270514290.15117.634878.419308940
HDB-HHX 1250-5000-TPDFPDFPDF50004050125101.2540 to 1125041250000.8965576920.19117.634878.419308940
Note: For Propane gas, turndown is 60% of stated natural gas turndown.