High BTU Capacity: Manages up to 550

this unit provides 16 cubic inch capacity with a specialized desiccant blend optimized for high moisture and acid removal from HFC

Why is the spacer ring included in this kit

Can I use a universal switch instead of the 11177102

For full valve overhauls

Lennox X8310 Filter 319825-402 High BTU Capacity: Manages upThe Lennox Healthy Climate X8310 is an OEM expandable MERV 11 filter designed for high efficiency air cleaners. This genuine HCXF20 11 replacement media measures 20x25x5 inches nominally, with actual dimensions of approximately 20. 75" x 24. 75" x 4. 38". Engineered for the Lennox X8304 housing, this accordion style furnace air filter utilizes a synthetic 20x25x5 MERV 11 pleated design to capture airborne contaminants as small as 0. 3 microns,