Ratings

Series 4NL/W-68 BIOMASS/WOOD RATINGS
BOILER MODEL MBH HP
Steam
Lbs./ Hr.
Firing Rate
Lbs./Hr.
Fireside Heating Surface
Sq. Ft.
Furnace Volume
Cu. Ft. Water Steam
4NL/W63-68 222 6.6 228 47 47 8.8 2,265 2,055
4NL/W78-68 271 8.1 279 57 55 10.7 2,650 2,390
4NL/W92-68 315 9.4 325 67 64 12.6 3,020 2,700
4NL/W107-68 364 10.9 375 77 74 14.6 3,500 3,140
4NL/W127-68 473 14.1 487 100 96 18.3 2,895 3,605
4NL/W154-68 566 16.9 583 120 115 21.9 4,465 4,040
4NL/W180-68 655 19.6 675 139 133 25.3 5,025 4,525
4NL/W209-68 753 22.5 776 160 153 29.1 5,620 5,040
4NL/W240-68 901 26.9 928 191 183 34.7 6,250 5,635
4NL/W277-68 1,034 30.9 1,065 219 210 39.7 6,985 6,285
4NL/W311-68 1,157 34.6 1,192 246 235 44.4 7,910 7,120
4NL/W345-68 1,280 38.2 1,319 272 260 49.1 8,535 7,650
4NL/W397-68 1,954 58.4 2,014 415 397 58.9 10,830 10,005
4NL/W463-68 2,279 68.1 2,349 484 463 68.0 13,055 12,100
4NL/W563-68 2,772 82.8 2,856 588 563 89.3 14,665 13,515
4NL/W662-68 3,259 97.4 3,359 692 662 104.7 17,390 16,030
4NL/W827-68 4,071 121.6 4,196 864 827 115.6 20,645 18,630
4NL/W993-68 4,888 146.0 5,038 1,038 993 139.2 23,455 21,005
4NL/W1157-68 5,696 170.1 5,870 1,209 1,157 160.7 27,675 25,340
4NL/W1323-68 6,513 194.6 6,712 1,383 1,323 186.5 31,540 28,815
4NL/W1654-68 8,142 243.2 8,392 1,729 1,654 234.0 36,900 33,710
4NL/W1985-68 9,772 291.9 10,071 2,075 1,985 301.6 44,370 40,815
4NL/W2315-68 11,396 340.4 11,745 2,420 2,315 348.6 53,385 49,270
4NL/W2645-68 13,021 389.0 13,419 2,764 2,645 383.8 60,120 55,590
4NL/W3075-68 10,215 305.1 10,528 2,169 2,075 505.6 78,710 71,630
WATER CONTENT GALLONSGROSS RATINGS
NOTES: 1. Boiler model sux “68” indicates 6.8 SQ.FT.F.S.H.S/HP.
2. Firing rate based on biomass/wood fuel at 6000 BTU/LB and 78.5% operating eciency.
3. Furnace volume is measured from the bottom of the boiler mudleg.