Dunham General Products Bulletin of Low-Pressure Steam Heating Appliances

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This brochure outlines Dunham's product offering in 1946. It outlines how the Dunham Differential Vacuum Heating System worked. It also highlights products including Dunham differential control equipment, float and thermostatic traps, bucket traps, return traps, vacuum pumps, condensation pumps, unit heaters, convectors, fittings, pressure reducing valves, and air eliminators. There is a very good engineering section near the end of the booklet.

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