Selection Guide
11
End Cap Splice plate Filler sleeve Center valve cover † Inside corner, 90
o
Outside corner, 90
o
End valve cover, †
End Cap-slotted slotted, 10"
(not shown) End valve cover, 10"
(not shown)
A complete range of accessories lets you “fit” J-series in vir-
tually any space configuration - fast and easily. Cover
accessories are all telescopic. They snap in place without
screws or other fasteners. All accessories have gray prime
finish. Custom color available on special order.
Column cover set Tamper-proof lock
Damper (electro galvanized)* Wall gasketing*
Hanging strip*
*See p.3 for details
RATINGS
ACCESSORIES
telescopic accessories
non-telescopic accessories
† 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.)
With or without dampers
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 1330 266 346 439 532 599 705 811 918 1037 1144 1264 1397
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1430 286 372 472 572 644 758 872 987 1115 1230 1359 1502
JL-10 S-832 2" steel 4
1
⁄4" steel 32 1350 270 351 446 540 608 716 824 931 1053 1161 1283 1418
JR-10 9
7
⁄8” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1753 351 456 578 701 789 929 1069 1210 1367 1507 1665 1840
C-440 1" copper 4
1
⁄4" alum. 40 1860 372 484 614 744 837 986 1135 1283 1451 1600 1767 1953
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1820 364 473 601 728 819 965 1110 1256 1420 1565 1729 1911
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 1550 310 403 512 620 698 822 946 1070 1209 1333 1473 1628
JA-14 S-832 2" steel 4
1
⁄4" steel 32 1400 280 364 462 560 630 742 854 966 1092 1204 1330 1470
JR-14 14” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 1839 368 478 607 736 828 975 1122 1269 1435 1582 1748 1932
C-440 1" copper 4
1
⁄4" alum. 40 1950 390 507 644 780 878 1034 1190 1346 1521 1677 1853 2048
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 1910 382 497 630 764 860 1012 1165 1318 1490 1643 1815 2006
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1460 292 380 482 584 657 774 891 1007 1139 1256 1387 1533
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1680 336 437 554 672 756 890 1025 1159 1310 1445 1596 1764
JA-21
S-832 2" steel 4
1
⁄4" steel 32 1520 304 395 502 608 684 806 927 1049 1186 1307 1444 1596
JR-21
21” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2013 403 524 665 805 906 1067 1228 1389 1570 1731 1913 2114
One-tier
C-440 1" copper 4
1
⁄4" alum. 40 2130 426 554 703 852 959 1129 1299 1470 1661 1832 2024 2237element
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 2090 418 544 690 836 941 1108 1275 1442 1630 1797 1986 2195
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2190 438 570 723 876 986 1161 1336 1511 1708 1883 2081 2300
JA-21 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2380 476 619 785 952 1071 1261 1452 1642 1856 2047 2261 2499
JR-21 S-832 2" steel 4
1
⁄4" steel 32 2270 454 590 749 908 1022 1203 1385 1566 1771 1952 2157 2384
Two-tier 21” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2822 586 762 967 1172 1270 1496 1721 1947 2200 2427 2784 2963
element C-440 1" copper 4
1
⁄4" alum. 40 2990 598 778 987 1196 1346 1585 1824 2063 2332 2571 2841 3140
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 2993 586 762 967 1172 1319 1553 1787 2022 2285 2520 2784 3077
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 1480 296 385 488 592 666 784 903 1021 1154 1273 1406 1554
S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 1710 342 445 564 684 770 906 1043 1180 1334 1471 1625 1796
JA-28
S-832 2" steel 41⁄4" steel 32 1550 310 403 512 620 698 822 946 1070 1209 1333 1473 1628
28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2051 410 533 677 821 924 1087 1251 1416 1600 1764 1949 2154
One-tier
C-440 1" copper 4
1
⁄4" alum. 40 2170 434 564 716 868 977 1150 1324 1497 1693 1866 2062 2279
element
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 2130 426 554 703 852 959 1129 1299 1470 1661 1832 2024 2237
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2290 458 596 756 916 1031 1214 1397 1580 1786 1969 2176 2405
JA-28 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2510 502 653 828 1004 1130 1330 1531 1732 1958 2159 2385 2636
S-832 2" steel 4
1
⁄4" steel 32 2430 486 632 802 972 1094 1288 1482 1677 1895 2090 2309 2552
Two-tier 28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 2937 588 764 970 1175 1322 1557 1792 2027 2291 2526 2791 3084
element C-440 1" copper 4
1
⁄4" alum. 40 3110 622 809 1026 1244 1400 1648 1897 2146 2426 2675 2955 3266
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 3050 610 793 1007 1220 1373 1617 1861 2105 2379 2623 2898 3203
S-532 1
1
⁄4" steel 4
1
⁄4" steel 32 2830 566 736 934 1132 1274 1500 1726 1953 2207 2434 2689 2972
JA-28 S-540 1
1
⁄4" steel 4
1
⁄4" steel 40 2930 586 762 967 1172 1319 1553 1787 2022 2285 2520 2784 3077
S-832 2" steel 4
1
⁄4" steel 32 2880 576 749 950 1152 1296 1526 1757 1987 2246 2477 2736 3024
Three-tier 28” C-340
3
⁄4" copper 4
1
⁄4" alum. 40 3467 693 901 1144 1387 1560 1837 2115 2392 2704 2981 3293 3640
element C-440 1" copper 4
1
⁄4" alum. 40 3670 734 954 1211 1468 1652 1945 2239 2532 2863 3156 3487 3854
C-540 1
1
⁄4" copper 4
1
⁄4" alum. 40 3600 720 936 1188 1440 1620 1908 2196 2484 2808 3096 3420 3780
* Based on 65˚F entering air temperature. Note: Ratings are based on active finned length (5-1/4" less than overall length).