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The HH18HA138 is an automatic reset limit switch
but it is recommended to install it with the cable entries pointing downward to prevent moisture ingress into the housing
it is technically an ASME Section IV valve for hot water heating boilers only
Featuring an 84-inch capillary tube
this assembly ensures the negative pressure regulated delivery of fuel required for high-efficiency modulating condensing boilers
Lennox 60G79 Heat Exchanger Freon The HH18HA138 is an automaticThe Lennox 60G79 Heat Exchanger (MPN: 60G79, replaces LB 58087BB) is a high performance primary heat exchange assembly engineered for Lennox GCS16 and GCS24 series furnaces. Built to handle the thermal stresses of industrial heating applications, this 170 pound unit effectively transfers thermal energy from the combustion chamber to the air stream without cross contamination. This OEM Lennox furnace component is also compatible with Allied, Armstrong,
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