Retailers can assign different internal SKUs to the same refrigerator model. Those store-specific listing codes do not establish that two products are identical. Match the manufacturer and exact model before combining retailer offers. Without a canonical anchor, you can't reliably aggregate review counts or recall notices for the same physical product across stores.

The FIN is that anchor. It lets Fridge.com link the same physical model across every retailer that sells it, so when you look at a refrigerator's page, you see the full picture: the lowest current price across all retailers, real customer reviews from every store that sells it, any active CPSC recall notices, and the manufacturer's spec sheets and owners manuals — all under one identifier.

FPN — Fridge.com Part Number: the permanent ID for a refrigerator or freezer replacement part, including gaskets and seals, sensors, hinges, handles, shelves and bins. The format is FPN, a hyphen, and seven digits — for example FPN-0000012. Like a FIN, it is assigned once and never changes or gets reused.

A part carries an FPN and never a FIN; an appliance carries a FIN and never an FPN. The two name different kinds of thing — a FIN anchors a whole refrigerator across every retailer that sells it, an FPN identifies one replacement part. Part pages show the FPN below the title, exactly where an appliance page shows its FIN.

Read the full FPN page → Browse the parts catalog →

FFN — Fridge.com Filter Number: the permanent ID for a refrigerator or freezer filter, including water filters, air filters and inline filters for refrigeration water and ice systems. Use the FFN to compare filter prices, and check compatibility with your appliance model before buying. The format is FFN, a hyphen, and seven digits — for example FFN-0000012. Assigned once, never changed, never reused.

Filters and replacement parts have separate identifiers. Follow the appliance and filter manufacturer instructions for compatibility and replacement intervals. A filter carries an FFN and never an FPN. Read the full FFN page →

FIS — Fridge.com Intelligence Score: a 0–100 rating of how well every U.S. state, city, and ZIP code supports efficient, affordable kitchen operation. The four systems are always named in the same order — FIN, FPN, FFN, FIS — three permanent identifiers, then one score. City and state scores describe upgrade urgency; ZIP scores describe affordability. Their inputs and directions differ, so scores from different location scopes should not be compared directly.

Products never carry an FIS. An identifier names a thing forever; a score judges a place today — mixing the two is how ratings get mistaken for identity, so Fridge.com never does. Explore FIS rankings in the Local Fridge Finder, or read the full FIS page →