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BLOWER PERFORMANCE SPECIFICATIONS GHS8
NOTES:
• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.
• All furnaces ship as high-speed cooling. Installer must adjust blower cooling speed as needed.
• For most jobs, about 400 CFM per ton when cooling is desirable
• INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
• The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area indicates
ranges in excess of maximum static pressure allowed when heating.
• The dashed (---) areas indicate a temperature rise not recommended for this model.
• The above chart is for U.S. furnaces installed at 0' - 2,000'. At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a
particular CFM, while ESP at the CFM will be lower.
Tons AC
at 0.5" 0.6 0.7 0.8
ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM
High 3.0 1,739 19 1,656 20 1,601 21 1,551 21 1,513 22 1,460 1,413 1,353
Med 2.5 1,422 23 1,399 24 1,378 24 1,350 25 1,305 26 1,275 1,220 1,178
Med-Lo 2.0 1,207 28 1,213 27 1,197 28 1,169 29 1,158 29 1,131 1,103 1,068
Low 1.5 991 34 980 34 958 35 950 35 937 36 924 910 874
High 4.0 2,097 25 2,068 25 2,012 26 1,939 27 1,869 28 1,795 1,718 1,631
Med 3.5 1,596 32 1,566 33 1,534 34 1,492 35 1,445 36 1,401 1,354 1288
Med-Lo 3.0 1,380 38 1,356 38 1,328 39 1,303 40 1,274 41 1,239 1,192 1127
Low 3.0 1239 42 1191 44 1165 45 1133 46 1,104 47 1,082 1,040 996
High 5.0 2,382 28 2,315 29 2,234 30 2,158 31 2,078 32 1,971 1,866 1,762
Med 4.0 1,622 41 1,603 42 1,583 42 1,556 43 1,516 44 1,482 1,422 1,359
Med-Lo 3.5 1,436 46 1,391 48 1,387 48 1,356 49 1,325 50 1,279 1,239 1,180
Low 3.0 1,240 54 1,214 55 1,191 56 1,157 58 1,120 60 1,083 1,052 1,025
BLOWER PERFORMANCE
0.1 0.2 0.3 0.4 0.5
(CFM & Temperature Rise vs. External Static Pressure)
Mo del
Heating Speed
As Shipped
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
GHS8
0453AXC
(Med)²
GHS8
0704BXC
(Med)²
GHS8
0905CXC
(Med)²
(
)