Designed for precise timing

Universal Compatibility: Includes both NAT and LP gas orifices for seamless integration across various fuel types

Important Notice:

they are functionally identical and share the same technical specifications for delay on make relays

The stacked design allows for multiple circuits to be controlled in a compact footprint

Lennox X6673 Replacement Filter Els PW 17895 Designed for precise timingThe Lennox X6673 (HCF20 11) is a high performance MERV 11 replacement filter designed for the Healthy Climate air cleaner series. This 5 inch deep pleated media filter provides superior filtration efficiency compared to standard 1 inch disposables, significantly increasing the dust holding capacity without causing excessive static pressure. It is engineered to capture 85% of particles down to 3 microns, including mold spores, pollen, and pet dander,