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Propane requires smaller orifices due to its higher BTU content

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the D350BA-1 serves as a reliable diagnostic window

Armstrong International A6942 Humidistat THPU32HP7Y pulling only 11The Armstrong International A6942 Humidistat is a high performance duct mounted high limit pneumatic humidistat designed for precise industrial and commercial humidity management. Engineering for the demanding environments of hospitals, laboratories, and printing plants, this high limit RA duct hygrostat operates within a critical 55 95% relative humidity (RH) range. Its reverse acting pneumatic mechanism utilizes a highly sensitive hygroscopic