Goodman Mfg GDS8 - Manual (Page 9)

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GDS8 a
irFlow
D
ata
CFM & Temperature Rise vs. External Static Pressure
Model
Motor
Speed
Tons
AC¹
External Static Pressure, (Inches Water Column)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM
GDS8
0403A*B
High 3.0 1,353 --- 1,290 --- 1,246 --- 1,199 25 1,149 26 1,116 1,116 1,099
Med 2.5 1,183 25 1,113 27 1,098 27 1,052 28 1,039 29 1,006 1,012 969
Med-Lo 2.0 980 30 946 31 920 32 900 33 896 33 885 855 804
Low 1.5 778 38 762 39 738 40 746 40 738 40 717 696 678
GDS8
0603A*B
High 3.0 1,290 34 1,236 36 1,194 37 1,166 38 1,176 38 1,166 1,108 1,029
Med 2.5 1,139 39 1,090 41 1,035 43 1,063 42 1,063 42 1020 962 895
Med-Lo 2.0 962 46 927 48 925 48 941 47 909 49 877 834 779
Low 1.5 787 56 776 57 763 58 744 60 723 --- 690 641 581
GDS8
0804B*B
High 4.0 2,128 --- 2,063 --- 2,001 --- 1,927 --- 1,824 --- 1,726 1,628 1,529
Med 3.5 1,840 --- 1,788 --- 1,745 --- 1,689 35 1,625 36 1,550 1,470 1,364
Med-Lo 3.0 1,602 37 1,558 38 1,543 38 1,493 40 1,455 41 1,402 1,328 1,239
Low 2.5 1,277 46 1,252 47 1,244 48 1,229 48 1,214 49 1,179 1141 1079
GDS8
1005C*B
High 5.0 2,405 --- 2,361 --- 2,250 --- 2,161 --- 2,037 36 1,937 1,808 1,689
Med 4.0 1,880 39 1,838 40 1,794 41 1,734 43 1,677 44 1,568 1,510 1,401
Med-Lo 3.5 1659 45 1,630 45 1,587 47 1,537 48 1,492 50 1,445 1,368 1,287
Low 3.0 1,472 50 1,454 51 1,404 53 1,366 54 1,326 56 1300 1228 1139
¹ at 0.5” ESP
GHS8 a
irFlow
D
ata
CFM & Temperature Rise vs. External Static Pressure
Model
Motor
Speed
Tons
AC¹
External Static Pressure, (Inches Water Column)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM
GHS8
0403A**
High 3.0 1,739 --- 1,656 --- 1,601 --- 1,551 --- 1,513 20 1,460 1,413 1,353
Med 2.5 1,422 21 1,399 21 1,378 22 1,350 22 1,305 23 1,275 1,220 1,178
Med-Lo 2.0 1,207 25 1,213 24 1,197 25 1,169 25 1,158 26 1,131 1,103 1,068
Low 1.5 991 30 980 30 958 31 950 31 937 32 924 910 874
GHS8
0604B**
High 4.0 2,097 21 2,068 21 2,012 22 1,939 23 1,869 24 1,795 1,718 1,631
Med 3.5 1,596 28 1,566 28 1,534 29 1,492 30 1,445 31 1,401 1,354 1288
Med-Lo 3.0 1,380 32 1,356 33 1,328 33 1,303 34 1,274 35 1,239 1,192 1127
Low 3.0 1239 36 1191 37 1165 37 1133 39 1,104 40 1,082 1,040 996
GHS8
0805C**
High 5.0 2,382 --- 2,315 --- 2,234 --- 2,158 --- 2,078 --- 1,971 1,866 1,762
Med 4.0 1,622 37 1,603 37 1,583 37 1,556 38 1,516 39 1,482 1,422 1,359
Med-Lo 3.5 1,436 41 1,391 43 1,387 41 1,356 44 1,325 45 1,279 1,239 1,180
Low 3.0 1,240 48 1,214 49 1,191 50 1,157 51 1,120 53 1,083 1,052 1,025
¹ at 0.5” ESP
Notes
• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two return filters, this
chart assumes both filters are installed.
• All furnaces ship as high-speed cooling and medium-speed heating. Installer must adjust blower cooling and heating 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.
• This chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on the rating plate.
• The dashed (----) areas indicate a temperature rise not recommended for this model.
• The above chart is for U.S. furnaces installed at 0-2000 feet. At higher altitudes, a properly derated unit will have approximately the same temperature rise
at a particular CFM, while ESP at the CFM will be lower.