Selection Guide
17
RATINGS
ACCESSORIES
telescopic accessories
*Based on 65
0
F entering air temperature.
Note: Ratings are based on active finned length (5-1/4" less than overall length.)
† Access doors: 6” x 6”. Door location depends on model.
Cover
Type
Enclosure
Height
Element
Type
Tube Size
and Material
Fins
Per
Foot
Steam
1 PSI*
Btu/Hr.
Per Foot
Fin Size
and Material
HOT WATER RATINGS*
BTU/HR./FT. (Flow Rate 3 Ft./Sec.)
110˚F 120˚F 130˚F 140˚F 150˚F 160˚F 170˚F 180˚F 190˚F 200˚F 210˚F 220˚F
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1230 246 320 406 492 554 652 750 849 959 1058 1169 1292
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1330 266 346 439 532 599 705 811 918 1037 1144 1264 1397
RL-10 S-832 2" steel 4
1
⁄4" steel 32 1270 254 330 419 508 572 673 755 876 991 1092 1207 1334
9
7
⁄8” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1647 329 428 544 659 742 872 1004 1136 1285 1417 1565 1730
C-440 1" copper 4
1
⁄4" alum. 40 1740 348 452 574 696 783 922 1061 1201 1357 1496 1653 1827
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1710 342 445 564 684 770 906 1043 1180 1334 1471 1625 1796
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1280 256 333 422 512 576 678 781 883 998 1101 1216 1344
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1500 300 390 495 600 675 795 915 1035 1170 1290 1425 1575
RT-14 S-832 2" steel 4
1
⁄4" steel 32 1320 264 343 436 528 594 700 805 911 1030 1135 1254 1386
14” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1714 343 446 566 685 771 908 1046 1183 1337 1474 1628 1800
C-440 1" copper 4
1
⁄4" alum. 40 1820 364 473 601 728 819 965 1110 1256 1420 1565 1729 1911
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1780 356 463 587 712 801 943 1086 1228 1388 1531 1691 1869
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1380 276 359 455 552 621 731 842 952 1076 1187 1311 1449
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1610 322 419 531 644 725 853 982 1111 1256 1385 1530 1691
RT-21 S-832 2" steel 4
1
⁄4" steel 32 1460 292 380 482 584 657 774 891 1007 1139 1256 1387 1533
One-tier 21” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1878 376 488 620 751 846 996 1146 1296 1465 1615 1784 1972
element C-440 1" copper 4
1
⁄4" alum. 40 1990 398 518 657 796 896 1055 1214 1373 1552 1711 1891 2090
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1950 390 507 644 780 878 1034 1190 1346 1521 1677 1853 2048
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2200 440 572 726 880 990 1166 1342 1518 1716 1892 2090 2310
RT-21 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2440 488 634 805 976 1098 1293 1488 1684 1903 2098 2318 2562
Two-tier S-832 2" steel 4
1
⁄4" steel 32 2230 446 580 736 892 1004 1182 1360 1539 1739 1918 2119 2342
element 21” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2668 534 694 881 1067 1201 1414 1627 1840 2081 2294 2535 2801
C-440 1" copper 4
1
⁄4" alum. 40 2830 566 736 934 1132 1274 1500 1726 1953 2207 2434 2689 2972
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 2770 554 720 914 1108 1247 1468 1690 1911 2161 2382 2632 2909
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1400 280 364 462 560 630 742 854 956 1092 1204 1330 1470
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1680 336 437 554 672 756 890 1025 1159 1310 1445 1596 1764
RT-28 S-832 2" steel 4
1
⁄4" steel 32 1480 296 385 488 592 666 784 903 1021 1154 1273 1406 1554
One-tier 28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1907 381 496 629 763 858 1010 1163 1315 1487 1640 1811 2002
element C-440 1" copper 4
1
⁄4" alum. 40 2020 404 525 667 808 909 1071 1232 1394 1576 1737 1919 2121
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1980 396 515 653 792 891 1049 1208 1366 1544 1703 1881 2079
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2260 452 588 746 904 1017 1198 1379 1559 1763 1944 2147 2373
RT-28 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2460 492 640 812 984 1107 1304 1501 1697 1919 2116 2337 2583
Two-tier S-832 2" steel 4
1
⁄4" steel 32 2270 454 590 749 908 1022 1203 1385 1566 1771 1952 2157 2384
element 28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2860 572 744 944 1144 1288 1516 1745 1973 2231 2460 2718 3004
C-440 1" copper 4
1
⁄4" alum. 40 3030 606 788 1000 1212 1364 1606 1848 2091 2363 2606 2879 3182
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 2970 594 772 980 1188 1337 1574 1812 2049 2317 2554 2822 3119
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2580 516 671 851 1032 1161 1367 1574 1780 2012 2219 2451 2709
RT-28 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2800 560 728 924 1120 1260 1484 1708 1932 2184 2408 2660 2940
Three-tier S-832 2" steel 4
1
⁄4" steel 32 2660 532 692 878 1064 1197 1410 1623 1835 2075 2288 2527 2793
element 28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 3390 678 881 1119 1356 1525 1797 2068 2339 2644 2915 3220 3559
C-440 1" copper 4
1
⁄4" alum. 40 3590 718 934 1185 1436 1616 1903 2190 2477 2800 3087 3411 3770
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 3520 704 915 1162 1408 1584 1866 2147 2429 2746 3027 3344 3696