Filter Fit FinderGeneralAire · humidifier
GeneralAire 1000 replacement filter
Use part GA900. Replace 1 to 2 times per humidification season.
The filter that fits
Maker lists this modelGeneralAire GA900 pad
GA900 Vapor Pad
- Part number
- GA900
- How many
- 1 per unit
- How often
- Replace 1 to 2 times per humidification season
The maker does not say how many pads the unit holds; one is assumed.
Opens an Amazon search for GeneralAire GA900 pad. Check the listing says GA900.
Look-alike models that take a different filter
GeneralAire's 1040 and 1042 Series and the 1137 take the 990-13 Vapor Pad, not the GA900; GeneralAire's 990-13 page lists them apart from the 900 & 1000 Series.
Sources
High confidence: the manufacturer names this exact model on a live page. Each line is the page we read and the day we read it.
- Which filter fits generalfilters.com Maker's own page checked Oct 1, 2026
Previously known as GA19, fits: GeneralAire® 900 & 1000 Series Humidifiers
- How often generalfilters.com Maker's own page checked Oct 1, 2026
Common Question: How often should I change my Vapor Pad ®? You'll want to replace your Vapor Pad ® 1-2 times per humidification season.
- What's in it generalfilters.com Maker's own page checked Oct 1, 2026
Your Vapor Pad ® is constructed using an expanded aluminum base, coated with a hydrophilic material that absorbs water.
- Look-alike models generalfilters.com Maker's own page checked Oct 1, 2026
Fits: GeneralAire ® Models 1137, 1040, and 1042 Series; SL16, 709, and 990