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Ratings and Data
Boiler Model No. SL375 SLD375 SL4100 SLD4100 SL5125 SLD5125 SL6150 SL7175
Firing Rate - #2 Fuel 0.75 0.75 1.00 1.00 1.25 1.25 1.50 1.75
Input BTU/HR 105,000 105,000 140,000 140,000 175,000 175,000 210,000 245,000
DOE Capacity BTU/HR 91,000 91,000 122,000 122,000 153,000 153,000 184,000 208,250
Net IBR Rating BTU/HR 79,000 79,000 106,000 106,000 133,000 133,000 160,000 181,100
Net Rating Sq. Ft. 526 526 707 707 887 887 1,067 1,207
AFUE Rating 85.5 85.5 86.5 86.5 86.9 86.9 86.9 85.0
Water Capacity 3.6 3.6 4.3 4.3 5.1 5.1 5.8 6.5
Approx. Shipping Weight 300 300 350 350 390 390 430 470
Cabinet Height 28 7/8" 28 7/8" 28 7/8" 28 7/8" 28 7/8" 28 7/8" 28 7/8"
Cabinet Width 17 3/4" 17 3/4" 17 3/4" 17 3/4" 17 3/4" 17 3/4" 17 3/4"
Cabinet Length 19 1/4" 19 1/4" 22 3/4" 22 3/4" 26 1/4" 29 3/4" 33 1/4"
Supply Outlet Height C.L. 25 3/8" 25 3/8" 25 3/8" 25 3/8" 25 3/8" 25 3/8" 25 3/8"
Return Outlet Height C.L. 4 1/2" 4 1/2" 4 1/2" 4 1/2" 4 1/2" 4 1/2" 4 1/2"
Flue Outlet Diameter 6" 6" 6" 6" 6" 6" 6"
Flue Outlet Height C.L. 20 3/4" 20 3/4" 20 3/4" 20 3/4" 20 3/4" 20 3/4" 20 3/4"