1 
October, 1915 
Jilt Coal Costs By Installing a Boiler 
lat Burns Soft Coal Smokelessly!! 
ITUMINOUS, or soft coal, costs an average of $3.75 a ton and con¬ 
tains about 14,300 heat units a pound, with lyflo ash : Anthracite costs 
average of $5.46 a ton; seldom contains more than 12,000 heat units a 
pound, and runs about 15% ash. So bituminous 
coal is not only cheaper but richer in heat value 
and contains less ash. 
1 Fresh fuel is fed onto the 
upper water tube grates, the 
he on the lower grates, being 
naintained by the hot coals, 
dropping onto it from above. 
Phis type of construction has 
been recommended by the most 
nroininent engineers for many 
° irs for the smokeless and eco- 
mical burning of soft coals. 
O The draft is down, which 
™ draws all of the heat-giving 
gases down through the fire on 
the upper grate, then down and 
over the hot coals on the lower 
grate. Any heat-giving gases not 
burned on the upper grate are 
completely burned below. This 
insures more heat with less coal, 
and smokeless combustion, be¬ 
cause smoke is nothing but un¬ 
burned fuel. 
O The temperature of the gases 
leaving the boiler is unusu¬ 
ally low, proving that the heat 
generated in the firebox of the 
boiler is used for heating the 
water in the boiler and not 
wasted up the stack. 
Sectional view showing construction, Kewanee Smokeless 
Boiler {Portable) also made regularly in Brickset type . 
There is no ordinance or law in any city, that prohibits the 
use of bituminous coal. The ordinances only prohibit smoke. 
And if your building is equipped with a boiler that burns all of the 
fuel it will comply with the smoke ordinance — because smoke is 
nothing but unconsumed fuel. 
Kewanee: 
Smokeless Boilers 
Cut Coal Costs! 
First of all a Kewanee Smokeless Boiler permits the use of 
cheap soft coal because it burns it so perfectly that there cannot 
be any smoke. 
And recent tests of Kewanee Smokeless Boilers; burning soft 
coal under conditions similar to those prevailing in most large 
buildings; prove that their efficiency ranges from 12% to 81%— 
while the ordinary type of boiler seldom averages better than 
60% when burning anthracite coal. 
Kewanee Smokeless Boilers are cutting coal 
costs by burning soft coal smokelessly in 
many of the best buildings in all parts of the 
country. Our nearest office would welcome an 
opportunity of proving this fact to you. 
Kewanee Boiler Company 
KEWANEE, ILLINOIS 
Steel Heating Boilers, Radiators, Tanks, 
Water Heating Garbage Burners 
CHICAGO NEW YORK ST. LOUIS 
KANSAS CITY MINNEAPOLIS 
