Goodman Mfg GDS8 - Manual (Page 8)

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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
GMS8
0403A*B
High 3 1,521 --- 1,466 --- 1,414 --- 1,373 --- 1,298 --- 1,243 1,164 1,075
Med 2.5 1,160 26 1,160 26 1,132 26 1,121 26 1,082 27 1,042 997 925
Med-Lo 2 961 31 955 31 948 31 932 32 913 33 882 821 803
Low 1.5 781 38 785 38 781 38 773 38 761 32 745 716 668
GMS8
0603A*B
High 3 1,422 31 1,352 33 1,307 34 1,197 37 1,157 38 1,092 1,075 983
Med 2.5 1,098 40 1,081 41 1,051 42 1,039 43 1,021 44 983 924 868
Med-Lo 2 919 48 913 49 892 50 847 ---- 829 ---- 818 792 728
Low 1.5 758 ---- 741 ---- 741 ---- 733 ---- 699 ---- 677 649 626
GMS8
0604B*B
High 4 2,134 21 2,100 21 2,042 22 1,975 23 1,883 24 1,786 1,700 1,601
Med 3.5 1,668 27 1,663 27 1,656 27 1,645 27 1,616 28 1,549 1,492 1,391
Med-Lo 3 1,419 31 1,426 31 1,426 31 1,432 31 1,419 31 1,378 1,328 1,261
Low 2.5 1,134 39 1,145 39 1,166 38 1,171 38 1,160 38 1,144 1,111 1,071
GMS8
0804B*B
High 4 2,051 ---- 1,983 ---- 1,895 --- 1,812 --- 1,725 --- 1,627 1,530 1,439
Med 3.5 1,736 --- 1,708 35 1,652 36 1,611 37 1,540 38 1,475 1,394 1,307
Med-Lo 3 1,493 35 1,668 36 1,459 41 1,429 41 1,389 43 1,339 1,274 1,204
Low 2.5 1,200 49 1,185 50 1,180 50 1,173 51 1,158 51 1,125 1,125 1,080
GMS8
0805C*B
High 5 2,290 ---- 2,229 ---- 2,155 ---- 2,047 ---- 1,960 ---- 1,837 1,712 1,584
Med 4 1,852 --- 1,820 --- 1,777 --- 1,719 --- 1,641 36 1,567 1,469 1,382
Med-Lo 3.5 1,615 37 1,592 37 1,556 38 1,516 39 1,470 40 1,405 1,346 1,235
Low 3 1,290 46 1,285 46 1,265 47 1,235 48 1,214 49 1,174 1,044 904
GMS8
1005C*B
High 5 2,323 --- 2,225 --- 2,120 35 2,040 36 1,974 38 1,801 1,688 1,577
Med 4 1,858 40 1,847 40 1,799 41 1,744 42 1,674 44 1,577 1,493 1,399
Med-Lo 3.5 1,596 46 1,587 47 1,571 47 1,552 48 1,493 50 1,397 1,326 1,217
Low 3 1,291 57 1,272 58 1,261 59 1,257 59 1,205 61 1,168 1,118 1,060
GMS8
1205D*B
High 5 2,469 --- 2,389 --- 2,300 --- 2,223 40 2,131 42 2,027 1,902 1,786
Med 4 1,575 56 1,558 57 1,545 58 1,513 59 1,500 59 1,419 1,354 1,271
Med-Lo 3.5 1,402 63 1,380 64 1,343 66 1,319 67 1,296 69 1,245 1,183 1,106
Low 3 1,200 ---- 1,186 ---- 1,161 ---- 1,127 ---- 1,082 ---- 1,042 995 926
GMS8
1405D*C
High 5 2,469 42 2,389 43 2,300 45 2,223 47 2,131 49 2,027 1,902 1,786
Med 4 1,575 66 1,558 67 1,545 67 1,513 69 1,500 69 1,419 1,354 1,271
Med-Lo 3.5 1,402 ---- 1,380 ---- 1,343 ---- 1,319 ---- 1,296 ---- 1,245 1,183 1,106
Low 3 1,200 ---- 1,186 ---- 1,161 ---- 1,127 ---- 1,082 ---- 1,042 995 926
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.