Model compatibility ledger

Honeywell HPA100 replacement filter

Use this model page to match the purifier body label to the OEM filter SKU, compatible alternatives, sizing notes, and retailer listings before ordering.

OEM filter SKU

HRF-AP1

Replacement interval

Every 12 months

Annual filter estimate

$35-$85

OEM filter first

Honeywell Universal Carbon Pre-Filter

Small room HPA-series purifier.

Model numbers: HPA100, HPA100C
Aliases: Honeywell small room purifier
Dimensions: Universal sheet trimmed to purifier size.

Last reviewed 2026-05-29. Match both purifier model and filter SKU because retailers often group similar cartridges together.

OEM and compatible filter comparison

OEM entries are shown first. Compatible alternatives are not manufacturer-approved unless marked OEM.

Check	OEM filter	Compatible option
Manufacturer-recommended filter	HRF-AP1 · Honeywell Universal Carbon Pre-Filter	HRF-AP1 · Honeywell Universal Carbon Pre-Filter Universal sheet trimmed to purifier size. Annual estimate: $15-$45.
Manufacturer-recommended filter	HRF-AP1 · Honeywell Universal Carbon Pre-Filter	HRF-R1 · Honeywell HRF-R1 True HEPA Filter R-size Honeywell HEPA panel filter. Annual estimate: $35-$85.

Retailer options for HRF-AP1

Amazon

Honeywell HRF-AP1 carbon pre-filter

Varies by listing

Affiliate link

Price note: Check retailer listing for current price.
Availability note: Use the SKU and model notes here to confirm fit before checkout.
Link disclosure: Amazon Associates; opens with sponsored nofollow attributes.

Check retailer listing

Verify the purifier model and filter SKU on the retailer page before ordering.

Home Depot

Honeywell HRF-AP1

Varies by listing

Affiliate link

Price note: Check retailer listing for current price.
Availability note: Verify model and SKU on the retailer page before ordering.
Link disclosure: Home Depot affiliate-capable search; opens with sponsored nofollow attributes.

Check retailer listing

Verify the purifier model and filter SKU on the retailer page before ordering.

Compatible alternatives

HRF-R1 Honeywell HRF-R1 True HEPA Filter · R-size Honeywell HEPA panel filter.