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.
Application Guidelines ⭳ Product Specification ⭳ User Guidelines ⭳ OEM Instructions ⭳ Submittal / Order Information ⭳
| Model Number | Std PDF | Std CAD | Alt PDF | Alt CAD | PDF of Gas Train | PDF of Wiring Diagram | Max Input MBH | Max Output MBH | Min Input MBH | Min Output MBH | Max Turn Down | Max Ind HX Input | # of HX's | Max CFM @ Min Rise | APD @ Min Rise | Max Temp Rise | Min CFM @ Max Rise | APD @ Max Rise | Dim. A | Dim. B | Dim. C | Dim. D | Weight (Lbs.) | Total Amps 120V | Total Amps 208V 230V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HDB-VHX-225-450-O | PDF | CAD | PDF | CAD | PDF | PDF | 450 | 360 | 45 | 36 | 10 to 1 | 225 | 2 | 16667 | 0.39 | 90 | 3704 | 0.09 | 48.86 | 19 | 78.81 | 17 | 512 | 8 | 5 |
| HDB-VHX-250-500-O | PDF | CAD | PDF | CAD | PDF | PDF | 500 | 400 | 50 | 40 | 10 to 1 | 250 | 2 | 18519 | 0.39 | 90 | 4115 | 0.11 | 48.86 | 19 | 78.81 | 17 | 512 | 8 | 5 |
| HDB-VHX-270-540-O | PDF | CAD | PDF | CAD | PDF | PDF | 540 | 432 | 54 | 43.2 | 10 to 1 | 270 | 2 | 20000 | 0.47 | 90 | 4444 | 0.03 | 55.36 | 19 | 78.81 | 17 | 552 | 8 | 5 |
| HDB-VHX-300-600-O | PDF | CAD | PDF | CAD | PDF | PDF | 600 | 480 | 60 | 48 | 10 to 1 | 300 | 2 | 22222 | 0.47 | 90 | 4938 | 0.02 | 55.36 | 19 | 78.81 | 17 | 552 | 8 | 5 |
| HDB-VHX-315-630-O | PDF | CAD | PDF | CAD | PDF | PDF | 630 | 504 | 63 | 50.4 | 10 to 1 | 315 | 2 | 23333 | 0.55 | 90 | 5185 | 0.02 | 61.87 | 19 | 78.81 | 17 | 594 | 8 | 5 |
| HDB-VHX-225-675-O | PDF | CAD | PDF | CAD | PDF | PDF | 675 | 540 | 45 | 36 | 15 to 1 | 225 | 3 | 25000 | 0.38 | 90 | 5556 | 0.03 | 65.12 | 19 | 78.81 | 17 | 718 | 12 | 7.5 |
| HDB-VHX-350-700-O | PDF | CAD | PDF | CAD | PDF | PDF | 700 | 560 | 70 | 56 | 10 to 1 | 350 | 2 | 25926 | 0.65 | 90 | 5761 | 0.03 | 61.87 | 19 | 78.81 | 17 | 594 | 8 | 5 |
| HDB-VHX-375-750-O | PDF | CAD | PDF | CAD | PDF | PDF | 750 | 600 | 75 | 60 | 10 to 1 | 375 | 2 | 27778 | 0.68 | 90 | 6173 | 0.03 | 68.37 | 19 | 78.81 | 17 | 642 | 8 | 5 |
| HDB-VHX-400-800-O | PDF | CAD | PDF | CAD | PDF | PDF | 800 | 640 | 80 | 64 | 10 to 1 | 400 | 2 | 29630 | 0.68 | 90 | 6584 | 0.03 | 68.37 | 19 | 78.81 | 17 | 642 | 8 | 5 |
| HDB-VHX-300-900-O | PDF | CAD | PDF | CAD | PDF | PDF | 900 | 720 | 60 | 48 | 15 to 1 | 300 | 3 | 33333 | 0.53 | 90 | 7407 | 0.03 | 82.24 | 19 | 78.81 | 17 | 773 | 12 | 7.5 |
| HDB-VHX-315-945-O | PDF | CAD | PDF | CAD | PDF | PDF | 945 | 756 | 63 | 50.4 | 15 to 1 | 315 | 3 | 35000 | 0.51 | 90 | 7778 | 0.03 | 91.99 | 19 | 78.81 | 17 | 836 | 12 | 7.5 |
| HDB-VHX-250-1000-O | PDF | CAD | PDF | CAD | PDF | PDF | 1000 | 800 | 50 | 40 | 20 to 1 | 250 | 4 | 37037 | 0.47 | 90 | 8230 | 0.03 | 88.74 | 19 | 78.81 | 17 | 919 | 16 | 10 |
| HDB-VHX-500-1000-O | PDF | CAD | PDF | CAD | PDF | PDF | 1000 | 800 | 100 | 80 | 10 to 1 | 500 | 2 | 37038 | 1.4 | 75 | 8230 | 0.07 | 81.37 | 23.63 | 78.81 | 20 | 733 | 8 | 5 |
| HDB-VHX-350-1050-O | PDF | CAD | PDF | CAD | PDF | PDF | 1050 | 840 | 70 | 56 | 15 to 1 | 350 | 3 | 38889 | 0.63 | 90 | 8642 | 0.03 | 91.99 | 19 | 78.81 | 17 | 836 | 12 | 7.5 |
| HDB-VHX-400-1200-O | PDF | CAD | PDF | CAD | PDF | PDF | 1200 | 960 | 80 | 64 | 15 to 1 | 400 | 3 | 44444 | 0.73 | 90 | 9877 | 0.03 | 101.74 | 19 | 78.81 | 17 | 903 | 12 | 7.5 |
| HDB-VHX-600-1200-O | PDF | CAD | PDF | CAD | PDF | PDF | 1200 | 1000 | 120 | 96 | 10 to 1 | 600 | 2 | 44444 | 1.5 | 75 | 9877 | 0.08 | 94.37 | 23.63 | 78.81 | 20 | 773 | 8 | 5 |
| HDB-VHX-500-1500-O | PDF | CAD | PDF | CAD | PDF | PDF | 1500 | 1200 | 150 | 120 | 15 to 1 | 500 | 3 | 55557 | 1.39 | 75 | 12345 | 0.08 | 121.24 | 23.63 | 78.81 | 20 | 1076 | 15 | 7.5 |
| HDB-VHX-600-1800-O | PDF | CAD | PDF | CAD | PDF | PDF | 1800 | 1440 | 180 | 144 | 15 to 1 | 600 | 3 | 66666 | 1.5 | 75 | 14814 | 0.07 | 140.74 | 23.63 | 78.81 | 20 | 1136 | 15 | 7.5 |