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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.
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Please be advised that lead times may be extended for certain high demand products Dismiss