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What filter does a GeneralAire 709 (GeneralAire) take?
It takes the GeneralAire 990-13 Vapor Pad — OEM part number 990-13.
GeneralAire 709 (GeneralAire), evaporative humidifier, whole house.
Lowest verified price: $15.00 — 1 pad, genuine GeneralAire 990-13 at eBay (Buy It Now listing). Marketplace listing; shipping terms vary by seller. Checked 2026-11-11.
Buy the 990-13 on Amazon — 990-13Amazon 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 Amazon price is shown on Amazon; we do not quote it here.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 990-13 Vapor Pad |
|---|---|
| Replacement interval | Replace once per year (GeneralAire product guide); the manufacturer also describes one to two pads per heating season. |
| Per change | One pad per change. Also fits GeneralAire Elite 900 and 1000 per the GFI #7002 listing. |
| Equivalents | None verified |
Verified prices
| Option | Price | Store & shipping |
|---|---|---|
| Genuine (OEM) 1 pad, genuine GeneralAire 990-13 | $15.00 | eBay (Buy It Now listing) Marketplace listing; shipping terms vary by seller · Checked 2026-11-11 · source |
Retail stock of the genuine 990-13 was thin when checked 2026-11-11 (a $12.48 listing at ClimateDoctors was sold out); the eBay Buy It Now price above is a live marketplace listing, labeled as such.
Full record with every price, source and date: GeneralAire 990-13 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.