Lennox Healthy Climate X6672 vs. Lennox Healthy Climate X6673

Filtration Efficiency & Capture Profile: Lennox Healthy Climate X6672 operates with a rated filtration level of MERV 16 compared to MERV 11 for Lennox Healthy Climate X6673. In standard ASHRAE 52.2 or AHAM testing, higher MERV ratings capture a larger fraction of sub-micron particles (0.3 to 1.0 microns), including wildfire smoke, aerosolized droplets, and fine dust, whereas lower ratings prioritize low resistance for general household lint.

Airflow Resistance & Equipment Dynamics: Airflow resistance across Lennox Healthy Climate X6672 must be evaluated against your system's blower architecture. On single-speed PSC blowers, installing higher-density media can elevate Total External Static Pressure (TESP), potentially reducing system CFM. For sensitive systems, Lennox Healthy Climate X6673 offers lower initial static drop, preserving equipment cooling capacity.

Critical Cabinet Housing Fitment Notice: 4-inch and 5-inch media filters require a dedicated in-line cabinet. Aprilaire collapsible accordion media (with Self-Seal plastic slide rails) fits proprietary Aprilaire cabinets (such as 1210, 1410, 2210, 2410). Rigid cardboard-framed box filters (such as Honeywell FC100) fit flat channels like the Honeywell F100/F200. These formats are physically non-interchangeable; confirm your cabinet model number before purchasing.