Resideo lists FC100A1037 as a replacement filter for the F100F2025 cabinet. Start with that part number when comparing products.
Your filter passport
FC100A1037
Manufacturer-listed replacement for F100F2025
Cabinet model
F100F2025
Original replacement part
FC100A1037
Manufacturer size label
20 × 25 × 4 in.
Information checked
October 9, 2026
This size is a label, not measured dimensions. Buy by verified model compatibility and the specific replacement's dimensions. Follow your equipment instructions for filter selection and replacement.
Installed on: __________________ Next check: __________________
Compare the specific replacement
Manufacturer-listed compatibility and supplier-listed compatibility are different evidence. The original part is listed above; the aftermarket rows below reflect each supplier's published cross-reference. These products have not been physically fit-tested by us.
FC100A1037 product size comparison
Product
Size label
Published actual size
Evidence / purchase
Honeywell Home / ResideoOriginal replacement · FC100A1037
20 × 25 × 4 in.
Not verified in this guideWe do not infer actual dimensions from the nominal label.
No live prices, stock checks, physical fit testing or independent performance rankings. Koch specifications are from its technical bulletin; its legacy link may now redirect to the knowledge center.
Before you order
Confirm the complete cabinet model on its label.
Match the exact original replacement part number.
Check the seller's current cross-reference, actual dimensions and return terms.
Follow your equipment instructions for airflow, filter selection and installation.
Why the depth may look different
Some compatible replacements use a 4.4- or 5-inch label. The label alone cannot establish fit. See the sourced sizing example.
Koch Air Bear OEM-2 technical bulletin — MERV 11 cross-reference rows; cached PDF reviewed. Live legacy URL may redirect to knowledge center.. Checked 2026-10-09.
This page covers the cabinet shown above. Other compatible cabinets or parts may exist but are outside this pilot's verified dataset.