National boilers, radiators, and specialties: catalog no. 26 (1920)
National Radiator Company · National Radiator Company · leaf 31
Combination Gas and Coal Heating Gas and coal boilers can be conveniently yoked together andoperated either separately or as one unit for heating purposes.By such an arrangement both boilers can be utilized in extremelycold weather or the coal boiler is ready for instant service inthe event of any… … Size, Inches 34 1 IH m 2 Capacity, cubic feet. . List without Mercury Seal....List with Mercury Seal 500 $7,00 7.25 535 $7.00 7.25 750$18.00 1860$18.00 4200$36.00 32 NATIONAL BOILER RATINGS Ratings The ratings of National Boilers are based upon tests madewith anthracite coal and provide that all…
