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.

Outdoor Venting Kit

– Vent riser assembly with integral rain cap.
– 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

Note: You must be logged in to view CAD, Gas Train and Wiring Diagram files.
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-180-360-OPDFPDFPDF3602923629.1610 to 1180290000.026045000.0140.6335.1378.417.1585
HDB-HHX-200-400-OPDFPDFPDF4003244032.410 to 12002100000.026050000.0140.6335.1378.417.1585
HDB-HHX 225-450-OPDFPDFPDF4503644536.4510 to 12252112500.036056250.0140.6335.1378.417.1562385
HDB-HHX 250-500-OPDFPDFPDF5004055040.510 to 12502125000.046062500.0140.6335.1378.417.1562385
HDB-HHX 270-540-OPDFPDFPDF5404375443.7410 to 12702135000.056067500.0140.6335.1378.417.1566985
HDB-HHX-180-540-OPDFPDFPDF5404373629.1615 to 11803135000.026067500.0160.1335.1378.417.15127.5
HDB-HHX-200-600-OPDFPDFPDF6004864032.415 to 12003150000.026075000.0160.1335.1378.417.15127.5
HDB-HHX 300-600-OPDFPDFPDF6004866048.610 to 13002150000.066075000.0240.6335.1378.417.1566985
HDB-HHX 315-630-OPDFPDFPDF6305106351.0310 to 13152157500.086078750.0240.6335.1378.417.1571585
HDB-HHX 225-675-OPDFPDFPDF6755474536.4515 to 12253168750.036084380.0160.1335.1378.417.15935127.5
HDB-HHX 350-700-OPDFPDFPDF7005677056.710 to 13502175000.16087500.0340.6335.1378.417.1571585
HDB-HHX 700-700-OPDFPDF7005677056.710 to 17001175000.1510052500.028578
HDB-HHX 360-720-OPDFPDFPDF7205837258.3210 to 13602180000.126090000.0340.6335.1378.417.1575085
HDB-HHX-180-720-OPDFPDFPDF7205833629.1620 to 11804180000.026090000.0179.6335.1378.417.151610
HDB-HHX 250-750-OPDFPDFPDF7506087560.7515 to 12503187500.046093750.0160.1335.1378.417.15935127.5
HDB-HHX 375-750-OPDFPDFPDF7506087560.7510 to 13752187500.136093750.0440.6335.1378.417.1576185
HDB-HHX 400-800-OPDFPDFPDF8006488064.810 to 14002200000.1460100000.0440.6335.1378.417.1576185
HDB-HHX-200-800-OPDFPDFPDF8006484032.420 to 12004200000.0260100000.0179.6335.1378.417.151610
HDB-HHX 800-800-OPDFPDF8006488064.810 to 18001200000.199066670.038578
HDB-HHX 270-810-OPDFPDFPDF8106565443.7415 to 12703202500.0560101250.0160.1335.1378.417.151003.5127.5
HDB-HHX 225-900-OPDFPDFPDF9007299072.920 to 12254225000.0360112500.0179.6335.1378.417.1512461610
HDB-HHX 300-900-OPDFPDFPDF9007296048.615 to 13003225000.0660112500.0260.1335.1378.417.15987127.5
HDB-HHX 900-900-OPDFPDF9007299072.910 to 19001225000.248084380.0488210
HDB-HHX-180-900-OPDFPDFPDF9007293629.1625 to 11805225000.0260112500.0199.1335.1378.417.152012.5
HDB-HHX 315-945-OPDFPDFPDF9457656351.0315 to 13153236250.0860118130.0260.1335.1378.417.151056127.5
HDB-HHX 500-1000-OPDFPDFPDF10008101008110 to 15002250000.2760125000.0845.6341.6478.42081610
HDB-HHX-200-1000-OPDFPDFPDF10008104032.425 to 12005250000.0260125000.0199.1335.1378.417.152012.5
HDB-HHX 1000-1000-OPDFPDF10008101008110 to 110001250000.349083330.0592110
HDB-HHX 250-1000-OPDFPDFPDF10008105040.520 to 12504250000.0460125000.0179.6335.1378.417.1512461610
HDB-HHX 350-1050-OPDFPDFPDF10508507056.715 to 13503262500.160131250.0360.1335.1378.417.151056127.5
HDB-HHX 270-1080-OPDFPDFPDF10808755443.7420 to 12704270000.0560135000.0179.6335.1378.417.1513381610
HDB-HHX 360-1080-OPDFPDFPDF10808757258.3215 to 13603270000.1260135000.0360.1335.1378.417.151125127.5
HDB-HHX 1100-1100-OPDFPDF110089111089.110 to 111001275000.418597060.0692110
HDB-HHX 375-1125-OPDFPDFPDF11259117560.7515 to 13753281250.1360140630.0460.1335.1378.417.151125127.5
HDB-HHX 225-1125-OPDFPDFPDF1125911112.591.12525 to 12255281250.0360140630.0199.1335.1378.417.15155820
HDB-HHX 1200-1200-OPDFPDF120097212097.210 to 112001300000.4870128570.192110
HDB-HHX 600-1200-OPDFPDFPDF120097212097.210 to 16002300000.4660150000.1345.6348.1478.42090710
HDB-HHX 400-1200-OPDFPDFPDF12009728064.815 to 14003300000.1460150000.0460.1335.1378.417.151125127.5
HDB-HHX 300-1200-OPDFPDFPDF120097212097.220 to 13004300000.0660150000.0279.6335.1378.417.1513441610
HDB-HHX 250-1250-OPDFPDFPDF12501013125101.2525 to 12505250000.0460125000.0199.1335.1378.417.15155820
HDB-HHX 1250-1250-OPDFPDF12501013125101.2510 to 112501312500.5265144230.1292110
HDB-HHX 315-1260-OPDFPDFPDF12601021126102.0620 to 13154315000.0860157500.0279.6335.1378.417.1514321610
HDB-HHX 270-1350-OPDFPDFPDF135010945443.7425 to 12705337500.0560168750.0199.1335.1378.417.151672.520
HDB-HHX 700-1400-OPDFPDF140011347056.720 to 17002350000.15100105000.02157116
HDB-HHX 350-1400-OPDFPDFPDF140011347056.720 to 13504350000.160175000.0379.6335.1378.417.1513961610
HDB-HHX 360-1440-OPDFPDFPDF144011667258.3220 to 13604360000.1260180000.0379.6335.1378.417.1515001610
HDB-HHX 500-1500-OPDFPDFPDF150012151008115 to 15003375000.2760187500.0867.6341.6478.4201237157.5
HDB-HHX 375-1500-OPDFPDFPDF150012157560.7520 to 13754375000.1360187500.0479.6335.1378.417.1514881610
HDB-HHX 300-1500-OPDFPDFPDF15001215150121.525 to 13005375000.0660187500.0299.1335.1378.417.15171020
HDB-HHX 315-1575-OPDFPDFPDF15751276157.5127.57525 to 13155393750.0860196880.0299.1335.1378.417.15179020
HDB-HHX 800-1600-OPDFPDF160012968064.820 to 18002400000.1990133330.03157116
HDB-HHX 400-1600-OPDFPDFPDF160012968064.820 to 14004400000.1460200000.0479.6335.1378.417.1514881610
HDB-HHX 350-1750-OPDFPDFPDF175014187056.725 to 13505437500.160218750.0399.1335.1378.417.1517372012.5
HDB-HHX 900-1800-OPDFPDF180014589072.920 to 19002450000.2480168750.04161720
HDB-HHX 600-1800-OPDFPDFPDF1800145812097.215 to 16003300000.4660150000.1367.6348.1478.4201374157.5
HDB-HHX 360-1800-OPDFPDFPDF180014587258.3225 to 13605450000.1260225000.0399.1335.1378.417.15187520
HDB-HHX 375-1875-OPDFPDFPDF187515197560.7525 to 13755468750.1360234380.0499.1335.1378.417.1518522012.5
HDB-HHX 500-2000-OPDFPDFPDF200016201008120 to 15004500000.2760250000.0889.6341.6478.420164520
HDB-HHX 400-2000-OPDFPDFPDF200016208064.825 to 14005500000.1460250000.0499.1335.1378.417.1518522012.5
HDB-HHX 1000-2000-OPDFPDF200016201008120 to 110002500000.3490166670.05168620
HDB-HHX 700-2100-OPDFPDF210017017056.730 to 17003525000.15100157500.02224324
HDB-HHX 1100-2200-OPDFPDF2200178211089.120 to 111002550000.4185194120.06168620
HDB-HHX 800-2400-OPDFPDF240019448064.830 to 18003600000.1990200000.03224324
HDB-HHX 1200-2400-OPDFPDF2400194412097.220 to 112002600000.4870257140.1168620
HDB-HHX 600-2400-OPDFPDFPDF2400194412097.220 to 16004300000.4660150000.1389.6348.1478.420177120
HDB-HHX 500-2500-OPDFPDFPDF250020251008125 to 15005625000.2760312500.08111.6341.6478.420206025
HDB-HHX 1250-2500-OPDFPDF25002025125101.2520 to 112502625000.5265288460.12168620
HDB-HHX 900-2700-OPDFPDF270021879072.930 to 19003675000.2480253130.04231830
HDB-HHX 700-2800-OPDFPDF280022687056.740 to 17004700000.15100210000.02299032
HDB-HHX 1000-3000-OPDFPDF300024301008130 to 110003750000.3490250000.05243530
HDB-HHX 600-3000-OPDFPDFPDF3000243012097.225 to 16005300000.4660150000.13111.6348.1478.420225225
HDB-HHX 800-3200-OPDFPDF320025928064.840 to 18004800000.1990266670.03299032
HDB-HHX 1100-3300-OPDFPDF3300267311089.130 to 111003825000.4185291180.06243530
HDB-HHX 900-3600-OPDFPDF360029169072.940 to 19004900000.2480337500.04309040
HDB-HHX 1200-3600-OPDFPDF3600291612097.230 to 112003900000.4870385710.1243530
HDB-HHX 1250-3750-OPDFPDF37503038125101.2530 to 112503937500.5265432690.12243530
HDB-HHX 1000-4000-OPDFPDF400032401008140 to 1100041000000.3490333330.05324640
HDB-HHX 1100-4400-OPDFPDF4400356411089.140 to 1110041100000.4185388240.06324640
HDB-HHX 1200-4800-OPDFPDF4800388812097.240 to 1120041200000.4870514290.1324640
HDB-HHX 1250-5000-OPDFPDF50004050125101.2540 to 1125041250000.5265576920.12324640
Note: For Propane gas, turndown is 60% of stated natural gas turndown.

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 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-OPDFPDFPDFPDF450360453610 to 12252166670.066055560.0136.435791762385
HDB-HHX 250-500-OPDFPDFPDFPDF500400504010 to 12502185190.086061730.0136.435791762385
HDB-HHX 270-540-OPDFPDFPDFPDF540432544310 to 12702200000.116066670.0136.435791766985
HDB-HHX 300-600-OPDFPDFPDFPDF600480604810 to 13002222220.136074070.0236.435791766985
HDB-HHX 315-630-OPDFPDFPDFPDF630504635010 to 13152233330.176077780.0236.435791771585
HDB-HHX 225-675-OPDFPDFPDFPDF675540453615 to 12253250000.066083330.0153.8357917756127.5
HDB-HHX 350-700-OPDFPDFPDFPDF700560705610 to 13502259260.26086420.0336.435791771585
HDB-HHX 700-700-OPDFN/aN/aPDFPDF700560705610 to 17001259260.3110051850.0230.674878.81198578
HDB-HHX 360-720-O7205767257.610 to 13602266660.246088880.0375085
HDB-HHX 375-750-OPDFPDFPDFPDF750600756010 to 13752277780.266092590.0436.435791776185
HDB-HHX 400-800-OPDFPDFPDFPDF800640806410 to 14002296300.36098770.0436.435791776185
HDB-HHX 800-800-OPDFN/aN/aPDFPDF800640806410 to 18001296300.399065840.0230.674878.81198578
HDB-HHX 270-810-O8106488164.815 to 12703300000.116010000.50.011003.5127.5
HDB-HHX 900-900-OPDFN/aN/aN/aPDF900720907210 to 19001333330.488083330.0430.674878.811988210
HDB-HHX 300-900-OPDFPDFPDFPDF900720604815 to 13003333330.1360111110.0253.8357917987127.5
HDB-HHX 315-945-OPDFPDFPDFPDF945756635015 to 13153350000.1760116670.0253.83579171056127.5
HDB-HHX 250-1000-OPDFPDFPDFPDF1000800504020 to 12504370370.0860123460.0171.235791712121610
HDB-HHX 1000-1000-OPDFN/a
N/a
PDFPDF10008001008010 to 110001370370.719082300.0430.748792292110
HDB-HHX 500-1000-OPDFPDFPDFPDF10008001008010 to 15001370370.5660123460.2745.6741.579.051981610
HDB-HHX 350-1050-OPDFPDFPDFPDF1050840705615 to 13503388890.260129630.0353.83579171056127.5
HDB-HHX 360-1080-OPDFPDFPDFPDF108086410886.415 to 13603400000.2460133330.0353.83579171125127.5
HDB-HHX 270-1080-O108086410886.420 to 12704400000.1160133340.0113381610
HDB-HHX 1100-1100-OPDFN/aN/aPDFPDF11008801108810 to 111001407410.848595860.0630.674878.811992110
HDB-HHX 375-1125-OPDFPDFPDFPDF1125900756015 to 13753416670.2660138890.0453.83579171125127.5
HDB-HHX 400-1200-OPDFPDFPDFPDF1200960806415 to 14003444440.360148150.0453.83579171125127.5
HDB-HHX 1200-1200-OPDFN/aN/aPDFPDF12009601209610 to 112001444440.9970126980.130.748792292110
HDB-HHX 600-1200-OPDFPDFPDFPDF12009601209610 to 16002444440.9460148150.1245.674879.051990710
HDB-HHX 1250-1250-OPDFN/a
N/a
PDFPDF1250100012510010 to 112501462961.0765142450.1230.748792292110
HDB-HHX 270-1350-O1350108013510825 to 12705500000.116016667.50.011672.520
HDB-HHX 350-1400-OPDFPDFPDFPDF14001120705620 to 13504518520.260172840.0371.235791713961610
HDB-HHX 700-1400-OPDFN/aN/aPDFPDF14001120705620 to 17002518520.31100103700.0259.674878.8119157116
HDB-HHX 360-1440-O14401152144115.220 to 13604533320.2460177760.0315001610
HDB-HHX 500-1500-OPDFPDFPDFPDF150012001008015 to 15003555560.5660185190.0767.7541.579221237157.5
HDB-HHX 375-1500-OPDFPDFPDFPDF15001200756020 to 13754555560.2660185190.0471.235791714881610
HDB-HHX 800-1600-OPDFN/aN/aPDFPDF16001280806420 to 18002592590.3990131690.0259.674878.8119157116
HDB-HHX 400-1600-OPDFPDFPDFPDF16001280806420 to 14004592590.360197530.0471.235791714881610
HDB-HHX 350-1750-OPDFPDFPDFPDF17501400705625 to 13505648150.260216050.0388.535791717372012.5
HDB-HHX 600-1800-OPDFPDFPDFPDF180014401209615 to 16003666670.9460222220.1267.754879221374157.5
HDB-HHX 900-1800-OPDFN/aN/aPDFPDF18001440907220 to 19002666670.4980166670.0459.674878.8119161720
HDB-HHX 360-1800-O1800144018014425 to 13605666650.2460222200.03187520
HDB-HHX 375-1875-OPDFPDFPDFPDF18751500756025 to 13755694440.2660231480.0488.535791718522012.5
HDB-HHX 500-2000-OPDFPDFPDFPDF200016001008020 to 15004740740.5660246910.0789.6741.579.0519164520
HDB-HHX 400-2000-OPDFPDFPDFPDF20001600806425 to 14005740740.360246910.0488.535791718522012.5
HDB-HHX 1000-2000-OPDFN/aN/aPDFPDF200016001008020 to 110002740740.7190164610.0459.75487922168620
HDB-HHX 700-2100-OPDFN/aN/aPDFPDF21001680705630 to 17003777780.31100155560.0288.674878.8119224324
HDB-HHX 1100-2200-OPDFN/aN/aPDFPDF220017601108820 to 111002814810.8485191720.0659.674878.8119168620
HDB-HHX 1200-2400-OPDFN/aN/aPDFPDF240019201209620 to 112002888890.9970253970.159.75487922168620
HDB-HHX 800-2400-OPDFN/aN/aPDFPDF24001920806430 to 18003888890.3990197530.0288.674878.8119224324
HDB-HHX 600-2400-OPDFPDFPDFPDF240019201209620 to 16004888890.9460296300.1289.674879.0519177120
HDB-HHX 500-2500-OPDFPDFPDFPDF250020001008025 to 15005925930.5660308640.07111.6741.579.0519206025
HDB-HHX 1250-2500-OPDFN/aN/aPDFPDF2500200012510020 to 112502925931.0765284900.1259.75487922168620
HDB-HHX 900-2700-OPDFN/aN/aN/aPDF27002160907230 to 190031000000.4880250000.0488.674878.8119231830
HDB-HHX 700-2800-OPDFN/aN/aPDFPDF28002240705640 to 170041037040.31100207410.02117.674878.8119299032
HDB-HHX 1000-3000-OPDFN/aN/aPDFPDF300024001008030 to 1100031111110.7190246910.0488.75487922243530
HDB-HHX 600-3000-OPDFPDFPDFPDF300024001209625 to 160051111110.9460370370.12111.674879.0519225225
HDB-HHX 800-3200-OPDFN/aN/aPDFPDF32002560806440 to 180041185190.3990263370.02117.674878.8119299032
HDB-HHX 1100-3300-OPDFN/aN/aPDFPDF330026401108830 to 1110031222220.8485287580.0688.674878.8119243530
HDB-HHX 1200-3600-OPDFN/aN/aPDFPDF360028801209630 to 1120031333330.9970380950.188.75487922243530
HDB-HHX 900-3600-OPDFN/aN/aN/aPDF36002880907240 to 190041333330.4880333330.04117.674878.8119309040
HDB-HHX 1250-3750-OPDFN/aN/aPDFPDF3750300012510030 to 1125031388891.0765427350.1288.75487922243530
HDB-HHX 1000-4000-OPDFN/aN/aPDFPDF400032001008040 to 1100041481480.7190329220.04117.75487922324640
HDB-HHX 1100-4400-OPDFN/aN/aPDFPDF440035201108840 to 1110041629630.8485383440.06117.674878.8119324640
HDB-HHX 1200-4800-OPDFN/aN/aPDFPDF480038401209640 to 1120041777780.9970507940.1117.75487922324640
HDB-HHX 1250-5000-OPDFN/aN/aPDFPDF5000400012510040 to 1125041851851.0765569800.12117.75487922324640
Note: For Propane gas, turndown is 60% of stated natural gas turndown.