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BLOWER PERFORMANCE SPECIFICATIONS
14
GDS8
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 hig-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 1,353 25 1,290 26 1,246 27 1,199 28 1,149 29 1,116 1,116 1,099
MED 2.5 1,183 28 1,113 30 1,098 30 1,052 32 1,039 32 1,006 1,012 969
MED-LO 2.0 980 34 946 35 920 36 900 37 896 37 885 855 804
LOW 1.5 778 43 762 44 738 45 746 45 738 45 717 696 678
HIGH 3.0 1,290 40 1,236 42 1,194 43 1,166 44 1,176 44 1,166 1,108 1,029
MED 2.5 1,139 46 1,090 48 1,035 50 1,063 49 1,063 49 1020 962 895
MED-LO 2.0 962 54 927 56 925 56 941 55 909 57 877 834 779
LOW 1.5 787 66 776 67 763 68 744 70 723 72 690 641 581
HIGH 4.0 2,128 31 2,063 32 2,001 33 1,927 35 1,824 37 1,726 1,628 1,529
MED 3.5 1,840 36 1,788 37 1,745 38 1,689 39 1,625 41 1,550 1,470 1,364
MED-LO 3.0 1,602 42 1,558 43 1,543 43 1,493 45 1,455 46 1,402 1,328 1,239
LOW 2.5 1,277 52 1,252 53 1,244 54 1,229 54 1,214 55 1,179 1141 1079
HIGH 5.0 2,405 35 2,361 36 2,250 38 2,161 39 2,037 42 1,937 1,808 1,689
MED 4.0 1,880 45 1,838 46 1,794 47 1,734 49 1,677 51 1,568 1,510 1,401
MED-LO 3.5 1659 51 1,630 52 1,587 54 1,537 55 1,492 57 1,445 1,368 1,287
LOW 3.0 1,472 58 1,454 59 1,404 61 1,366 62 1,326 64 1300 1228 1139
GDS8
1155CXC
(Med)²
GDS8
0453AXC
(Med)²
GDS8
0703AXC
(Med)²
GDS8
0904BXC
(Med)²
BLOWER PERFORMANCE
0.1 0.2 0.3 0.4 0.5
(CFM & Temperature Rise vs. External Static Pressure)
Model
Heating Speed
As Shipped
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
()