What does the F135-30F rating signify

the filter mat should be replaced when the differential pressure drop across the filter exceeds 1 kPa (10 mbar) or during annual inspections of the gas train

preventing timing errors or potential equipment damage

while EK164 identifies the model series

This OEM Williams P022800 replacement is manufactured from reinforced

Amana-Goodman 22312907 Heater Assembly Els PW 17895 What does the F135-30F ratingThe Amana Goodman 22312907 Heater Assembly is a 3. 5kW electric heat kit engineered specifically for integration with select PTAC units and air handlers. This replacement heater element provides a precise heat load to maintain space temperature requirements during low ambient conditions. Built for field installation or direct swap outs, the 22312907 heater kit features durable nichrome heating coils and integrated thermal limit protection to prevent