Table S3: VHC-50 Temperature Rise Over Gas-fired Furnace (°F) – 5:1, 2:1 and On/Off Models
Air Volume (CFM) 250 MBH 300 MBH 350 MBH 400 MBH
2,500 75.2 90.3
2,600 72.3 86.8
2,700 69.7 83.6
2,800 67.2 80.6 94.1
2,900 64.9 77.8 90.8
3,000 62.7 75.2 87.8
3,100 60.7 72.8 84.9
3,200 58.8 70.5 82.3 94.1
3,300 57.0 68.4 79.8 91.2
3,400 55.3 66.4 77.5 88.5
3,500 53.7 64.5 75.2 86.0
3,600 52.3 62.7 73.2 83.6
3,700 50.8 61.0 71.2 81.3
3,800 49.5 59.4 69.3 79.2
3,900 48.2 57.9 67.5 77.2
4,000 47.0 56.4 65.8 75.2
4,100 45.9 55.1 64.2 73.4
4,200 44.8 53.7 62.7 71.7
4,300 43.7 52.5 61.2 70.0
4,400 42.8 51.3 59.9 68.4
4,500 41.8 50.2 58.5 66.9
4,600 40.9 49.1 57.2 65.4
4,700 40.0 48.0 56.0 64.0
4,800 39.2 47.0 54.9 62.7
4,900 38.4 46.1 53.7 61.4
5,000 37.6 45.1 52.7 60.2
5,100 36.9 44.3 51.6 59.0
5,200 36.2 43.4 50.6 57.9
5,300 35.5 42.6 49.7 56.8
5,400 34.8 41.8 48.8 55.7
5,500 34.2 41.0 47.9 54.7
Use caution in shaded areas.
Values above are calculated at sea level.
Temperature rise = Sea level temperature rise / (1−Elevation (ft.) x 0.0000334)
Gas inlet pressure required for natural gas minimum 5” w.c., maximum 13.5” w.c.; for propane minimum 11” w.c., maximum 13.5” w.c.
High altitude kit required for elevations over 2,000 feet.
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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