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

supporting accurate flame sensing and reducing false-positive ignition failures

reducing resistance issues and preventing premature failure caused by improper installations

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

This HVAC blower relay serves as a direct replacement for specific Armstrong and Concord furnace models

Lennox X6673 Replacement Filter Els PW 17895 Universal Compatibility: Includes both NATThe 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,