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100% Make-Up Air Performance Table
Adobe PDF Version 
CFM @
70°F		 Model Horsepower at Design ESP* Design Temperature Rise BTU/hr in 1000s
0.25 0.5 0.75 1 1.5 2 40 50 60 70 80 90 100 110 120
1400 RAM-10 0.75 0.75 0.75 - - - 60 76 91 106 121 136 151 166 181
1500 RAM-10 0.75 0.75 0.75 1 - - 65 81 97 113 130 146 162 178 194
1600 RAM-10 0.75 0.75 1 1 - - 69 86 104 121 138 156 173 190 207
1800 RAM-10 0.75 1 1 1 1.5 - 78 97 117 136 156 175 194 214 233
2000 RAM-10 1 1 1 1 1.5 2 86 108 130 151 173 194 216 238 259
2200 RAM-10 1 1.5 1.5 1.5 2 2 95 119 143 166 190 214 238 261 285
RAM-12 1 1 - - - -
2400 RAM-10 1.5 1.5 1.5 1.5 2 2 104 130 156 181 207 233 259 285 311
RAM-12 1 1 1.5 - - -
2500 RAM-10 1.5 1.5 1.5 1.5 2 3 108 135 162 189 216 243 270 297 324
RAM-12 1 1.5 1.5 1.5 - -
2600 RAM-10 1.5 1.5 1.5 2 2 3 112 140 168 197 225 253 281 309 337
RAM-12 1 1.5 1.5 1.5 - -
2800 RAM-10 1.5 1.5 2 2 3 3 121 151 181 212 242 272 302 333 363
RAM-12 1.5 1.5 1.5 2 2 -
3000 RAM-10 2 2 2 3 3 3 130 162 194 227 259 292 324 356 389
RAM-12 1.5 1.5 1.5 2 2 -
3200 RAM-10 2 2 3 3 3 3 138 173 207 242 276 311 346 380 415
RAM-12 1.5 1.5 2 2 3 3
3400 RAM-10 2 3 3 3 3 5 147 184 220 257 294 330 367 404 441
RAM-12 1.5 2 2 2 3 3
RAM-15 1.5 1.5 - - - -
3500 RAM-10 3 3 3 3 5 5 151 189 227 265 302 340 378 416 454
RAM-12 1.5 2 2 3 3 3
RAM-15 1.5 1.5 - - - -
3600 RAM-10 3 3 3 3 5 5 156 194 233 272 311 350 389 428 467
RAM-12 2 2 2 3 3 3
RAM-15 1.5 1.5 2 - - -
3800 RAM-12 2 2 3 3 3 5 164 205 246 287 328 369 410 451 492
RAM-15 1.5 2 2 - - -
4000 RAM-12 2 3 3 3 3 5 173 216 259 302 346 389 432 475 518
RAM-15 1.5 2 2 3 - -
4200 RAM-12 3 3 3 3 5 5 181 227 272 318 363 408 454 499 544
RAM-15 2 2 2 3 - -
4400 RAM-12 3 3 3 3 5 5 190 238 285 333 380 428 475 523 570
RAM-15 2 2 3 3 3 -
4500 RAM-12 3 3 3 5 5 5 194 243 292 340 389 437 486 535 583
RAM-15 2 2 3 3 3 -
4600 RAM-12 3 3 3 5 5 5 199 248 298 348 397 447 497 546 596
RAM-15 2 2 3 3 5 -
4800 RAM-12 3 3 5 5 5 5 207 259 311 363 415 467 518 570 622
RAM-15 2 3 3 3 5 5
5000 RAM-12 5 5 5 5 5 5 216 270 324 378 432 486 540 594 648
RAM-15 2 3 3 3 5 5
RAM-18 2 3 3 - - -
5500 RAM-15 3 3 3 5 5 5 238 297 356 416 475 535 594 653 713
RAM-18 2 3 3 3 - -
6000 RAM-15 3 5 5 5 5 5 259 324 389 454 518 583 648 713 778
RAM-18 3 3 3 5 5 -
6500 RAM-15 5 5 5 5 5 7.5 281 351 421 491 562 632 702 772 842
RAM-18 3 3 5 5 5 7.5
7000 RAM-15 5 5 5 5 7.5 7.5 302 378 454 529 605 680 756 832 907
RAM-18 3 5 5 5 5 7.5
RAM-20 3 3 5 - - -
7500 RAM-18 5 5 5 5 7.5 7.5 324 405 486 567 648 729 810 891 972
RAM-20 3 3 5 5 - -
8000 RAM-18 5 5 5 7.5 7.5 7.5 346 432 518 605 691 778 864 950 1037
RAM-20 3 5 5 5 - -
8500 RAM-18 5 5 7.5 7.5 7.5 10 367 459 551 643 734 826 918 1010 1102
RAM-20 5 5 5 5 7.5 -
9000 RAM-18 5 7.5 7.5 7.5 7.5 10 389 486 583 680 778 875 972 1069 1166
RAM-20 5 5 5 5 7.5 7.5
9500 RAM-18 7.5 7.5 7.5 7.5 10 10 410 513 616 718 821 923 1026 1129 1231
RAM-20 5 5 5 7.5 7.5 7.5
10,000 RAM-18 7.5 7.5 7.5 10 10 10 432 540 648 756 864 972 1080 1188 1296
RAM-20 5 5 7.5 7.5 7.5 10
RAM-22 5 5 5 7.5 - -
11,000 RAM-20 7.5 7.5 7.5 7.5 10 10 475 594 713 832 950 1069 1188 1307 1426
RAM-22 5 5 7.5 7.5 7.5 -
12,000 RAM-20 7.5 7.5 7.5 10 10 15 518 648 778 907 1037 1166 1296 1426 1555
RAM-22 7.5 7.5 7.5 7.5 10 10
13,000 RAM-20 10 10 10 10 15 15 562 702 842 983 1123 1264 1404 1544 1685
RAM-22 7.5 7.5 7.5 10 10 15
14,000 RAM-20 10 10 15 15 15 15 605 756 907 1058 1210 1361 1512 1663 1814
RAM-22 7.5 10 10 10 15 15
15,000 RAM-20 15 15 15 15 15 - 648 810 972 1134 1296 1458 1620 1782 1944
RAM-22 10 10 10 15 15 15
RAM-25 7.5 7.5 7.5 10 10 -
16,000 RAM-22 10 10 15 15 15 15 691 864 1037 1210 1382 1555 1728 1901 2074
RAM-25 7.5 7.5 10 10 15 15
RAM-27 7.5 7.5 7.5 - - -
17,000 RAM-22 15 15 15 15 15 20 734 918 1102 1285 1469 1652 1836 2020 2203
RAM-25 7.5 10 10 10 15 15
RAM-27 7.5 7.5 7.5 10 - -
18,000 RAM-22 15 15 15 15 20 20 778 972 1166 1361 1555 1750 1944 2138 2333
RAM-25 10 10 10 15 15 15
RAM-27 7.5 7.5 10 10 - -
19,000 RAM-25 10 10 15 15 15 20 821 1026 1231 1436 1642 1847 2052 2257 2462
RAM-27 7.5 10 10 10 15 -
20,000 RAM-25 10 15 15 15 15 20 864 1080 1296 1512 1728 1944 2160 2376 2592
RAM-27 10 10 10 15 15 -
RAM-30 7.5 10 10 15 - -
21,000 RAM-25 15 15 15 15 20 20 907 1134 1361 1588 1814 2041 2268 2495 2722
RAM-27 10 10 15 15 15 20
RAM-30 10 10 10 15 15 -
22,000 RAM-25 15 15 15 15 20 20 950 1188 1426 1663 1901 2138 2376 2614 2851
RAM-27 10 15 15 15 15 20
RAM-30 10 10 15 15 15 -
RAM-222 10 10 15 15 15 -
23,000 RAM-25 15 15 15 20 20 25 994 1242 1490 1739 1987 2236 2484 2732 2981
RAM-27 10 15 15 15 20 20
RAM-30 10 15 15 15 20 20
RAM-222 10 15 15 15 20 20
24,000 RAM-25 15 20 20 20 20 25 1037 1296 1555 1814 2074 2333 2592 2851 3110
RAM-27 15 15 15 15 20 20
RAM-30 10 15 15 15 20 20
RAM-33 10 10 15 15 - -
RAM-222 10 15 15 15 20 20
25,000 RAM-27 15 15 15 20 20 20 1080 1350 1620 1890 2160 2430 2700 2970 3240
RAM-30 15 15 15 15 20 20
RAM-33 10 10 15 15 - -
RAM-222 15 15 15 15 20 25
26,000 RAM-27 15 15 20 20 20 25 1123 1404 1685 1966 2246 2527 2808 3089 3370
RAM-30 15 15 15 20 20 25
RAM-33 10 15 15 15 - -
RAM-222 15 15 15 20 20 25
27,000 RAM-27 15 20 20 20 20 25 1166 1458 1750 2041 2333 2624 2916 3208 3499
RAM-30 15 15 15 20 20 25
RAM-33 10 15 15 15 20 -
RAM-222 15 15 20 20 20 25
28,000 RAM-27 20 20 20 20 25 25 1210 1512 1814 2117 2419 2722 3024 3326 3629
RAM-30 15 15 20 20 20 25
RAM-33 15 15 15 15 20 -
RAM-36 15 15 15 15 - -
RAM-222 15 15 20 20 25 25
29,000 RAM-27 20 20 20 25 25 30 1253 1566 1879 2192 2506 2819 3132 3445 3758
RAM-30 15 20 20 20 25 25
RAM-33 15 15 15 20 20 25
RAM-36 15 15 15 20 20 -
RAM-222 15 20 20 20 25 25
30,000 RAM-30 20 20 20 20 25 30 1296 1620 1944 2268 2592 2916 3240 3564 3888
RAM-33 15 15 15 20 20 25
RAM-36 15 15 15 20 20 -
RAM-222 20 20 20 20 25 30
RAM-225 15 15 15 20 20 -
32,000 RAM-30 20 20 25 25 25 30 1382 1728 2074 2419 2765 3110 3456 3802 4147
RAM-33 15 20 20 20 25 25
RAM-36 15 15 20 20 25 25
RAM-222 20 20 25 25 30 30
RAM-225 15 15 20 20 25 25
34,000 RAM-30 20 25 25 25 30 40 1469 1836 2203 2570 2938 3305 3672 4039 4406
RAM-33 20 20 20 25 25 30
RAM-36 20 20 20 20 25 30
RAM-222 25 25 25 30 30 40
RAM-225 15 20 20 20 25 30
RAM-227 15 15 15 20 - -
36,000 RAM-30 25 25 30 30 40 40 1555 1944 2333 2722 3110 3499 3888 4277 4666
RAM-33 20 20 25 25 30 30
RAM-36 20 20 25 25 25 30
RAM-222 25 30 30 30 40 40
RAM-225 15 20 20 25 25 30
RAM-227 15 15 20 20 - -
38,000 RAM-33 25 25 25 30 30 40 1642 2052 2462 2873 3283 3694 4104 4514 4925
RAM-36 20 25 25 25 30 40
RAM-225 20 20 25 25 30 40
RAM-227 15 15 20 20 25 -
40,000 RAM-33 25 25 30 30 40 40 1728 2160 2592 3024 3456 3888 4320 4752 5184
RAM-36 25 25 25 30 30 40
RAM-225 20 25 25 25 30 40
RAM-227 15 20 20 20 25 -
RAM-230 15 20 20 20 - -
42,000 RAM-33 30 30 30 40 40 40 1814 2268 2722 3175 3629 4082 4536 4990 5443
RAM-36 25 30 30 30 40 40
RAM-225 25 25 25 30 40 40
RAM-227 20 20 20 25 30 40
RAM-230 15 20 20 25 30 -
44,000 RAM-36 30 30 40 40 40 40 1901 2376 2851 3326 3802 4277 4752 5227 5702
RAM-225 25 25 30 30 40 40
RAM-227 20 20 25 25 30 40
RAM-230 20 20 20 25 30 -
46,000 RAM-36 30 40 40 40 40 50 1987 2484 2981 3478 3974 4471 4968 5465 5962
RAM-225 30 30 30 40 40 50
RAM-227 20 25 25 30 30 40
RAM-230 20 20 25 25 30 40
48,000 RAM-225 30 30 40 40 40 50 2074 2592 3110 3629 4147 4666 5184 5702 6221
RAM-227 25 25 30 30 40 40
RAM-230 30 25 25 30 40 40
50,000 RAM-227 25 30 30 30 40 40 2160 2700 3240 3780 4320 4860 5400 5940 6480
RAM-230 20 25 25 30 40 40
52,000 RAM-227 30 30 30 40 40 50 2246 2808 3370 3931 4493 5054 5616 6178 6739
RAM-230 25 25 30 30 40 40
54,000 RAM-227 30 30 40 40 40 50 2333 2916 3499 4082 4666 5249 5832 6415 6998
RAM-230 25 30 30 40 40 50
RAM-233 20 25 25 30 40 -
56,000 RAM-227 30 40 40 40 50 50 2419 3024 3629 4234 4838 5443 6048 6653 7258
RAM-230 25 30 30 40 40 50
RAM-233 25 25 30 30 40 -
58,000 RAM-227 40 40 40 40 50 50 2506 3132 3758 4385 5011 5638 6264 6890 7517
RAM-230 30 30 40 40 50 50
RAM-233 25 30 30 40 40 50
60,000 RAM-230 30 40 40 40 50 50 2592 3240 3888 4536 5184 5832 6480 7128 7776
RAM-233 25 30 30 40 40 50
RAM-236 25 30 30 40 40 -
62,000 RAM-230 40 40 40 40 50 - 2678 3348 4017 4687 5356 6026 6696 7365 8035
RAM-233 30 30 40 40 50 50
RAM-236 25 30 40 40 40 50
64,000 RAM-230 40 40 40 50 50 - 2765 3456 4147 4838 5530 6221 6912 7603 8294
RAM-233 30 40 40 40 50 50
RAM-236 30 30 40 40 50 50
66,000 RAM-230 40 40 50 50 - - 2851 3564 4277 4990 5702 6415 7128 7841 8554
RAM-233 30 40 40 40 50 60
RAM-236 30 40 40 40 50 50
68,000 RAM-230 40 50 50 50 - - 2938 3672 4406 5141 5875 6610 7344 8078 8813
RAM-233 40 40 40 50 50 60
RAM-236 30 40 40 40 50 60
70,000 RAM-230 50 50 50 50 - - 3024 3780 4536 5292 6048 6804 7560 8316 9072
RAM-233 40 40 40 50 50 60
RAM-236 40 40 40 50 50 60
72,000 RAM-233 40 40 50 50 60 60 3110 3888 4666 5443 6221 6998 7776 8554 9331
RAM-236 40 40 40 50 50 60
76,000 RAM-233 50 50 50 60 60 75 3283 4104 4925 5746 6566 7387 8208 9029 9850
RAM-236 40 50 50 50 60 75
80,000 RAM-233 50 50 60 60 75 75 3456 4320 5184 6048 6912 7776 8640 9504 10368
RAM-236 50 50 50 60 60 75
86,000 RAM-233 60 60 75 75 75 100 3715 4644 5573 6502 7430 8359 9288 10217 11146
RAM-236 50 60 60 75 75 100
88,000 RAM-236 60 60 60 75 75 100 3802 4752 5702 6653 7603 8554 9504 10454 11405
92,000 RAM-236 60 75 75 75 100 100 3974 4968 5962 6955 7949 8942 9936 10930 11923
*ESP consists of duct losses and accessories that are external to the unit (hood, filter, and damper).
Consult factory for ESP over 2"