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HW – 503 air filters, replaces Honeywell Part number 203721. Free Shipping on all online orders.
Airguard Honeywell replacement filters are built for dependability and durability.
The Honeywell replacement filter model HW-503 replaces Honeywell part number 203720.
Actual Dimension: 19-3/4x20x4-3/8
Commercial, Hospitals, Industrial, Museum/Preservation, Residential
We carry air filter replacements for all makes and models across all industries, from standard panels for residential use.
Please be advised that lead times may be extended for certain high demand products Dismiss