Can I replace this insert while the system is under pressure

This specific 904874 model is primarily designed for 90% efficient units and "C" cabinet sizes

this freeze protection thermostat ensures comprehensive coverage across large coil faces

This comprehensive OEM replacement kit—also identified as Lennox X834801—contains the core components required to sustain the photocatalytic oxidation process

Key Benefits OEM Compatibility: Precision-engineered as a direct replacement for Lennox part 100198-01

Daikin-McQuay 4000835 Filter 326058-757 Can I replace this insertThe Daikin McQuay 4000835 Filter is a factory original OEM replacement air filter engineered for high efficiency particulate capture in Daikin mini split and McQuay HVAC systems. Designed as a rugged washable filter, this 12. 5" x 14. 5" screen serves as the primary barrier against airborne dust and contaminants that compromise heat exchanger efficiency. Maintaining clean coils is critical for preventing high head pressure issues and evaporator freeze