Home › Models › GeneralAire 900A
What filter does a GeneralAire 900A take?
It takes the GeneralAire GA19 Vapor Pad — OEM part number GA19.
GeneralAire 900A, whole-house humidifier, whole house.
Lowest verified price: none captured yet — see the notes below. The Amazon button below is the current buy route.
Buy the GA19 on Amazon — GA19Amazon search for the exact part number (no single listing is endorsed). Amazon price is shown on Amazon; we do not quote it here.
The part, in brief
| Part | GeneralAire GA19 Vapor Pad |
|---|---|
| Replacement interval | Replace once per year (GeneralAire guidance for Elite-series pads). |
| Per change | One pad per change. |
| Equivalents | York (Source 1) S1-HUPAD18 |
Verified prices
| Option | Price | Store & shipping |
|---|
No verified in-stock US retail price was captured on 2026-11-11 (a $18.57 figure appeared only in an aggregator referencing an Amazon listing, and this site does not quote Amazon prices).
Full record with every price, source and date: GeneralAire GA19 Vapor Pad page.
Finding the model number on a GeneralAire
Whole-house models: the model number is on the cover of the unit mounted on the ductwork. The vapor pad number (990-13, GA19) is in the manual and on the old pad's packaging.