GeneralAire 1099-20 Water Panel (Legacy Slant Fin fit)
OEM part number(s):
1099-201099 20
Made by GeneralAire (GFI). Replacement interval: Replace annually (FM Distributing)..
Exact fit — verified
Fits 6 models
Across 1 brand(s): Slant Fin. Examples: GF-200, GF-210, GF-211, GF-220, GF-240, GF-350 — the complete verified fit list is on this page.
Cross-brand equivalents
1 verified equivalent(s): BestAir GF35 / A35 — full table below.
Prices checked 2026-11-11: genuine from $12.80 + shipping at FM Distributing. Every price in the table below carries its store and checked date.
Amazon is a buy link, not a price claim: Amazon blocks automated price reads, so its price is never quoted here.
Exact fit — all 6 verified models
Harvested from published manufacturer and retailer fit lists (sources at the bottom of this page). If your exact model is not listed, do not assume fit — check the number on your current part.
Slant Fin (6)
GF-200
GF-210
GF-211
GF-220
GF-240
GF-350
Aftermarket equivalents
| Brand | Part number | Note |
|---|---|---|
| BestAir | GF35 / A35 | BestAir equivalent family. |
All verified prices
| Kind | Store | Pack | Price | Shipping | Checked |
|---|---|---|---|---|---|
| Genuine OEM | FM Distributing | 1 panel, genuine GeneralAire 1099-20 | $12.80 + shipping item $12.80 | FM Distributing shipping terms at checkout | 2026-11-11 |
No aftermarket price was verified for the 1099-20 this pass.
Specs
| Dimensions | 9.92 × 12.01 × 1.65 in (one retailer's spec; another states only 1-year life). |
| Replacement interval | Replace annually (FM Distributing). |
| Treatment / media | Nominal 950 sq in evaporation area; MERV 8 nominal. |
| Quantity note | LEGACY: this is the GeneralAire panel for the old Slant Fin GF-200/GF-210/GF-211/GF-220/GF-240/GF-350 humidifiers — Slant Fin's humidifier line is long discontinued, but the panels are still sold. |