This document is from the Illinois Engineering Co. and provides information about Illinois Heating Systems, packless radiator valves, thermostatic traps, the standard vacuum heating system, and vapor heating systems. You can find the Illinois Heating Systems circa-1923 catalog here. Thanks to Patrick Linhardt for finding, scanning and sharing this with us.
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This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).