Search·GermGuardian
When you already know your purifier’s model number, this page shows the replacement filter numbers we match to it—then you can compare with your old filter and shop.
Brand
GermGuardian
Model AC4230
GermGuardian AC4230 Air Purifier
Series: Tower
These filter part numbers are matched to this air purifier model in our reference. Compare the part number with the label on your current filter or your owner’s manual before you buy.
Your replacement
GUARDIAN-FLT4100
FLT4100 HEPA + carbon combo
Replace about every 6 months
GUARDIAN-FLT4100 is the part shown first for model AC4230; match that part number before checkout.
Why this part
- 1 mapped replacement part option for this purifier model in our reference
- Notes available for this part
- When a BuckParts Verified Link appears below, we checked that retailer product page against this part number. Compare it with your old filter before ordering.
Replacement filter fit for this model is based on our reference data.
BuckParts Verified Links
A place to buy that BuckParts has checked against the part, listing, and evidence we trust. Not every filter page has one—we only show a link when our checks clear for this part number.
Shown as a BuckParts Verified Link after we checked the product page against this filter number (2026-04-21).
All details for this part (notes, compatible models, BuckParts Verified Links when listed)
Notes & next steps
Search again if you need a different model or part number.