Lochinvar & A.O. Smith 100233577 Filter

Maintaining clear intake pathways is critical for high-efficiency operation, and the Lochinvar & A.O. Smith 100233577 Filter is the professional-grade solution for preventing debris from fouling the heat exchanger. This 1" x 12" x 12" heavy duty air filter kit is specifically engineered for compatibility with a wide range of Lochinvar and A.O. Smith boiler and water heater models, including the Crest (CBL, CBN) and Copper-Fin (CHL, CHN) series. As an OEM replacement part, it ensures the precise pressure drop and airflow ratings required to satisfy the unit’s air pressure switch and prevent "low air" error codes that result in ignition failure. Built with a rugged aluminum frame and multi-layer expanded metal media, this washable HVAC filter is a durable alternative to disposable units, designed to withstand the high-demand environments where boilers typically operate. Whether you are performing a seasonal combustion analysis or a full system teardown, replacing a clogged or degraded Lochinvar air filter is essential for protecting internal components from airborne particulates and ensuring peak thermal performance.

Key Benefits for HVACR Professionals:

• Exact OEM Specification: Ensures the correct static pressure and micron filtration for Lochinvar boiler maintenance.
• Heavy-Duty Construction: Features a reinforced metal frame and washable aluminum media for long-term reliability in mechanical rooms.
• Cross-Compatibility: Directly replaces legacy part numbers FIL2075, FIL2075K, and 100145882.
• System Protection: Minimizes the risk of combustion blower strain and secondary heat exchanger fouling.

Common Questions & Technical Support:

• Is this filter compatible with my specific Lochinvar model? This kit fits several Crest and Copper-Fin commercial models. Always verify via the serial and model number before installation to ensure exact fitment.
• How often should the 100233577 filter be cleaned? For most commercial applications, we recommend inspecting the filter every 3 to 6 months. High-dust environments may require monthly servicing to maintain proper ventilation air flow.
• Can I use a standard 12x12x1 pleated filter instead? No. Standard residential pleated filters often have higher resistance (static pressure) which can trigger air pressure switch faults in high-efficiency boilers. Stay with OEM heavy duty filters to avoid nuisance shutdowns.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.