Fits checked Oct 1, 2026 · How we check
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GeneralAire · humidifier · whole house bypass

GeneralAire 1099LHS replacement filter

Use part GA23, or any one of 1099-20. Replace 1 to 2 times per humidification season.

Any one of these fits · first listed

Maker lists this model

GeneralAire GA23 pad

GA23 Vapor Pad

Part number
GA23also sold as 7923
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.

Buy GA23 pad on AmazonManufacturer page

Opens an Amazon search for GeneralAire GA23 pad. Check the listing says GA23.

See the sources

Compare the 2 options

The 1099LHS holds one filter at a time. Any one of these fits; GeneralAire lists them in this order.

FilterGradeSizeHow oftenBuy
GA23 padGA23expanded aluminum Vapor Pad with hydrophilic coating1 to 2 times per humidification seasonAmazon
1099-20 pad1099-20expanded aluminum Vapor Pad with hydrophilic coating1 to 2 times per humidification seasonAmazon

Does your exact model share this filter?

GeneralAire labels several versions of the 1099LHS. Check the label on your unit.

  • 1099LHS takes GA23
  • 1099 not confirmed by GeneralAire · GeneralAire's 1099-20 page says it fits '1099 Series Humidifiers'
  • 1099LH not confirmed by GeneralAire · Older 1099 model name in the demand list; not on a GeneralAire page read here

Look-alike models that take a different filter

The 1042LH takes the 990-13 pad.

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
    GA23 Vapor Pad Product No. 7923 Fits: GeneralAire® Elite Model 1099LHS & 950 ... Fits the GeneralAire® Models 1099LHS and 950
  • 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.
Show all 9 sources

Which filter fits

  1. generalfilters.com Maker's own page checked Oct 1, 2026
    GA23 Vapor Pad Product No. 7923 Fits: GeneralAire® Elite Model 1099LHS & 950 ... Fits the GeneralAire® Models 1099LHS and 950
  2. generalfilters.com Maker's own page checked Oct 1, 2026
    Page for the 1099LHS (per its URL): PARTS: GA23 Vapor Pad GFI# 7923
  3. generalfilters.com Maker's own page checked Oct 1, 2026
    Fits: GeneralAire® 1099 Series Humidifiers
  4. generalfilters.com Maker's own page checked Oct 1, 2026
    Model Name: 1099LHS Part Number: 5015 ... Replacement Vapor Pad ®: 1099-20 (GFI #7047)
  5. generalfilters.com Maker's own page checked Oct 1, 2026
    Model Name: 1099LHS ... Style By-pass

How often

  1. 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.
  2. 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

  1. 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.
  2. 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.