Hearth & Home 2166-338 Control Module IPI 30 Black Type_Spa Vac Test your hardness — if

Test your hardness — if it's under 150 ppm

If you've measured your fill water and the calcium hardness reading came back at 150 ppm

Whether you're seeking gentle relaxation or invigorating massage

Buying the right products individually takes research and a few trips

Its time-tested performance

Hearth & Home 2166-338 Control Module IPI 30 Black Type_Spa Vac Test your hardness — ifHearth & Home 2166 338 Control Module IPI 30 Black Overview The Hearth & Home 2166 338 Control Module IPI 30 Black is a factory original replacement component designed for use with select Hearth & Home Technologies gas fireplace systems featuring the IntelliFire Plus (IPI) ignition system. This advanced control module coordinates the operation of critical fireplace functions including ignition, flame sensing, fan control, and safety shutdowns.