# Humidifier Filter by Model: Honeywell Filter A to Aprilaire Water Panel 35, the Wick or Panel Part Number and the Interval the Maker Prints

> Honeywell HCM-350 takes Filter A HAC-504 (30 to 60 days), HEV615/620 take Filter T, Aprilaire 600/700 take Panel 35 yearly, the 400 takes Panel 45 twice a season.

| | |
|---|---|
| Source | https://ownerspec.com/air/parts/humidifier-filter-by-model/ |
| Publisher | OwnerSpec (https://ownerspec.com/) |
| Published | 2026-10-02 |
| Updated | 2026-10-02 |
| Facts verified | 2026-10-02 |
| Disclosure | Contains affiliate links. OwnerSpec may earn a commission at no cost to the reader. |

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## Short answer

A humidifier filter is matched by the model number on the label, not by the brand on the box, and every part below is read from the maker's own page or manual. Honeywell's Filter A (HAC-504, part HAC504PF1V2) fits the HCM-300, 500, 600, 700, 1000 and 2000 series and is replaced every 30 to 60 days; the HEV615 and HEV620 towers take Filter T (HFT600) instead, every 30 to 60 days or about 20 to 30 tank fillings. Aprilaire's Water Panel 35 fits the 600 and 700 series and is replaced once a year, Panel 10 fits the 500 series, Panel 12 fits the 224 and 225, and the Aprilaire 400 takes Panel 45 twice per heating season. Honeywell's HE240 takes pad HC22P and the HE280 takes HC26P, annually. Vornado wicks (MD1-0034, MD1-0002) run 4 to 8 weeks, Canopy's filter 5 to 7 weeks, and the Levoit LV600HH has no filter at all.

## Fact sheet

- **Answer:** The model number sets the part: Honeywell HCM-300, 500, 600 and 1000 series take Filter A HAC-504 (HAC504PF1V2) every 30 to 60 days, HEV615 and HEV620 take Filter T HFT600 every 30 to 60 days or 20 to 30 tank fillings, Aprilaire 600 and 700 take Water Panel 35 once a year while the Aprilaire 400 takes Water Panel 45 twice per heating season, and Honeywell HE240 and HE280 take pads HC22P and HC26P annually.
- **Applies to:** Honeywell HCM-350, HCM-300T, HCM-530, HCM-630, HCM-1000, HEV-312, HEV-355; Honeywell HEV615, HEV620 (Filter T), HCM-6011, HEV-680 (Filter E), HCM-750 (Filter B); Aprilaire 300, 350, 360, 560, 568, 600, 700, 760, 768 (Panel 35); 400 (Panel 45); 110, 220, 500, 550, 558 (Panel 10); 112, 136, 224, 225, 440, 445, 448 (Panel 12); Honeywell HE240 (HC22P), HE280 and HE260A (HC26P); Vornado EV100, EV200, EVDC300, EVDC500, Evap2, Evap40 (MD1-0034); Evap1, Evap3, EV3, EV5, Model 30, 50 (MD1-0001 / MD1-0002); AIRCARE EP9500, EP9700, EP9800, 831000, 836000 (1043); Canopy Bedside and Nursery (Canopy filter); Levoit LV600HH (filterless)
- **Compatibility basis:** Honeywell maker store pages for Filter A, Filter T, Filter E and Filter B and the HCM-350 and HE240/HE280 manuals (PDF); Aprilaire shop pages for Water Panels 35, 45, 10 and 12, the Aprilaire maintenance page and Water Panel Guide; Resideo and Honeywell Home pages for HC26P1002/U; Vornado wick pages; AIRCARE 1043 page; Canopy filter page and Bedside manual (PDF); Levoit LV600HH page and VeSync cartridge page
- **Assumptions:** Intervals are the maker's printed figure; every maker that prints one also says water hardness and run time move it, and nothing was tested here.; Fit lists are copied from the maker's current page; a model not named on that page is not claimed to fit.; Where a maker page for a model was not readable this session (Vicks WF2, AIRCARE HDC12, Honeywell HAC-801), the page says so instead of filling the gap.
- **Method:** Part numbers, fit lists and replacement intervals read from each maker's product page or PDF manual on 2026-10-02; every listed ASIN checked IN_STOCK through the Amazon Creators API the same day; this page is a spec comparison of published documents, not a test.
- **Primary source:** [Honeywell Store, HAC-504 Filter A page (HAC504PF1V2)](https://www.honeywellstore.com/store/products/honeywell-hac-504aw-humidifier-replacement-filter-air-washing-prefilter.htm) (manufacturer or vendor document)
- **Facts verified:** 2026-10-02
- **Last updated:** 2026-10-02
- **Canonical URL (cite this):** https://ownerspec.com/air/parts/humidifier-filter-by-model/

Do not order a Honeywell "humidifier filter" by brand alone: Filter A does not fit the HEV615 tower, Filter T fits nothing but the HEV600 series, and the Aprilaire 400 wants its panel twice a season when every other Aprilaire wants one a year.

## Which wick or panel fits which humidifier model?

Each row is read from the maker's page or PDF in the Sources list. Honeywell portable parts come from the Honeywell maker store, which is the brand's own shop; the HCM-350 and HE240/HE280 figures come from the PDF manuals.

| Humidifier model | Replacement part | Maker interval | Where the maker says so | Genuine listing |
|---|---|---|---|---|
| Honeywell HCM-300T, 305T, 310T, 315T, 350, 350B; HEV-312, 355; HCM-530 to 560; HCM-630 to 650; HCM-710; HCM-1000, 1010; HCM-2000C to 2050; Enviracaire ECM-250i | Filter A, HAC-504 (HAC504PF1V2; manual prints HAC-504AW) | Every 30 to 60 days | Filter A store page; HCM-350 manual | Filter A, 1 pack, 3 pack |
| Honeywell HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W | Filter T, HFT600 (HFT600PF1V2 single, HFT600PF2V2 pair) | Every 30 to 60 days, or about 20 to 30 tank fillings | Filter T store pages | Filter T, 3 count, 1 pack |
| Honeywell HCM-6009, 6011i, 6011WW, 6012i, 6013i; HEV-680B, 680W, 685 | Filter E, HC-14 (HC14PF3V2, 3 pack) | Every 30 to 60 days | Filter E store page | Not verified this session |
| Honeywell HCM-750, 750B, 750-TGT | Filter B, HAC700PDQV1 | None printed; store page marks it discontinued | Filter B store page | Discontinued at the maker |
| Aprilaire 300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 600KZ, 600MKZ, 700, 700A, 700M, 700KZ, 700MKZ, 760, 760A, 768 | Water Panel 35 (kits H635EZ1A for 600, H735EZ1A for 700); nominal 13 x 10 x 2 in, actual 13 x 10 x 1.75 in | Annually (300, 600, 700) | Panel 35 page; maintenance page; Water Panel Guide | Panel 35, pack of 1, pack of 2 |
| Aprilaire 400, 400A, 400M, 400KZ, 400MKZ | Water Panel 45 (kit H445EZ1A); actual 12.875 x 9.875 x 1.75 in | Twice per heating season | Panel 45 page; maintenance page | Panel 45, pack of 2 |
| Aprilaire 110, 220, 500, 500A, 500M, 550, 550A, 558 | Water Panel 10 (kit H510EZ1A); nominal 10 x 10 x 2 in, actual 9.75 x 9.5 x 1.75 in | Annually (500) | Panel 10 page; maintenance page | Panel 10, pack of 1, pack of 2 |
| Aprilaire 112, 136, 224, 225, 440, 445, 445A, 448 | Water Panel 12; nominal 15 x 12 x 2 in, actual 14.75 x 11.5 x 1.75 in | None printed for these models | Panel 12 page | Panel 12, pack of 1 |
| Honeywell HE240 | Pad HC22P | Annually, sooner on hard water | HE240/HE280 manual, Table 3 | Listing title does not print HC22P; not linked |
| Honeywell HE280; HE260A | Pad HC26P (HC26P1002/U), 10 x 13 x 1.5 in paper with antimicrobial coating | Annually, sooner on hard water | HE240/HE280 manual; Resideo page | HC26P pad |
| Vornado EV100, EV200, EVDC300, EVDC500, Evap2, Evap40, Baby HUEY | MD1-0034 wick, 1 in thick | Every 4 to 8 weeks, depending on use | MD1-0034 page | MD1-0034, 2 pack |
| Vornado Evap1, Evap3, EV3, EV5, Model 30, Model 50 | MD1-0001 wick, 1.5 in thick, "same as MD1-0002" | Every 4 to 8 weeks | MD1-0001 page | MD1-0002, 2 pack |
| AIRCARE EP9500, EP9700, EP9800, EP9R500, EP9R700, EP9R800, 821002, 821990, 826800, 826900, 831000, 836000, 836000HB, SS390DWHT; Bemis 821000, 821001, 826000, 826600 | 1043 SuperWick, 11 x 12 x 4 in | None printed | 1043 product page | 1043, single, pair |
| Canopy Bedside, Nursery | Canopy replacement filter, wood pulp paper | Every 5 to 7 weeks; Filter light when due; subscription every 45 days | Bedside manual; filter page | Canopy filter, 3 pack |
| Levoit LV600HH | None: "Filterless Design" | Not applicable | LV600HH product page | Nothing to buy |
| Levoit OasisMist 450S, 1000S, Dual 150, Dual 200S, Classic 160, Classic 300S, LV600S | Optional demineralization cartridge | None printed | VeSync cartridge page | Not verified this session |

AIRCARE's wick category lists SuperWick numbers 1040, 1041, 1043, 1044, 1045, EasyWick 1046 and Air Filter 1050 without fit data, and no HDC12 at all. Vicks WF2 and Honeywell HAC-801 never surfaced on a maker page this session, so neither appears above.

## Which models share a part, and which look alike but do not?

Three pairs account for most wrong orders.

| Looks like one part | What the maker prints |
|---|---|
| Honeywell Filter A and Filter T | Filter A's page names the HCM and HEV-312/355 models; Filter T's page names only the six HEV615/HEV620 variants. Neither page cross-lists the other. |
| Aprilaire Panel 35 and Panel 45 | Both are a nominal 13 x 10 x 2 in. Panel 45 is actually 12.875 x 9.875 in, Panel 35 is 13 x 10 in, and Aprilaire lists them for different models (400 series against 300/560/600/700 series). |
| Vornado MD1-0034 and MD1-0002 | MD1-0034 is 1 in thick for the EV and Evap2/Evap40 units; MD1-0001, which Vornado says is the same as MD1-0002, is 1.5 in thick for Evap1, Evap3, EV3, EV5, Model 30 and 50. |

The whole-house pads are the one place a cross-reference is printed by a second maker document: Resideo's page for HC26P1002/U lists the HE260A, which the HE240/HE280 manual does not mention. If the furnace humidifier is a Honeywell bypass unit, the [whole-house humidifier review](/air/reviews/best-whole-house-humidifier/) lists which current model takes which pad.

## How often do they really need replacing?

Every interval on this page is the maker's own, and the makers that print one add the same caveat. Honeywell's Filter A page says 30 to 60 days "depending on water quality and usage" and to replace sooner if the wick hardens, develops an odor, or output drops. Vornado says 4 to 8 weeks "depending on use". The HE240/HE280 manual says annually, more often on hard water, and suggests softened water if it is available.

Aprilaire prints two different intervals. Its maintenance page says to replace the panel annually on Models 300, 500, 600, 700 and 720, and twice per heating season on the Model 400. The panel pages themselves print no month figure and say only that the panel clogs from residual impurities in the water.

Two makers print no interval at all. AIRCARE's 1043 page lists the fit and a 30-day warranty; Honeywell's Filter B page lists the HCM-750 fit and marks the part discontinued. A portable with a discontinued wick is the case for the [bedroom humidifier review](/air/reviews/best-humidifier-for-bedroom/) rather than a hunt for stock.

**Which part to order**

The Aprilaire Panel 45 pack of 2 is the one 2 pack here that covers a single season, because Aprilaire's own page puts the 400 on two panels a winter. For every other Aprilaire the Panel 35 or Panel 10 single is a year.

On portables the maker's 30 to 60 days is the shorter bill: the Honeywell Filter A 3 pack is 3 to 6 months at that rate, and it is the wrong part for an HEV615, which takes the Filter T 3 count. Read the model label first. Every listing above was in stock on 2026-10-02.

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## The picks

- **Honeywell Filter A, HAC-504 (1 pack)**: HCM-350, HCM-300T, HCM-530, HCM-630, HCM-1000 or HEV-312 owner (Honeywell store: part HAC504PF1V2, fits the HCM-300, 500, 600, 700, 1000 and 2000 series, HEV-312 and HEV-355; replace every 30 to 60 days) Amazon: https://www.amazon.com/dp/B07V4T5477/?tag=ownerspec-20
- **Honeywell Filter A, HAC-504 (3 pack)**: Same models, buying a heating season at once (Honeywell store: same Filter A fit list; at 30 to 60 days a 3 pack covers roughly 3 to 6 months) Amazon: https://www.amazon.com/dp/B07W69P2TK/?tag=ownerspec-20
- **Honeywell Filter T, HFT600 (3 count)**: HEV615 or HEV620 top-fill tower owner (Honeywell store: filter model HFT600PDQ, fits HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W only; every 30 to 60 days or about 20 to 30 tank fillings) Amazon: https://www.amazon.com/dp/B07W45Q9L6/?tag=ownerspec-20
- **Honeywell Filter T, HFT600 (1 pack)**: HEV615 or HEV620 owner trying the genuine wick once (Honeywell store: part HFT600PF1V2, same six-model fit list, 30 to 60 days) Amazon: https://www.amazon.com/dp/B07VJJZ4R1/?tag=ownerspec-20
- **AprilAire Water Panel 35 (pack of 1)**: Aprilaire 600, 700, 560, 568, 760 or 768 owner (Aprilaire shop: fits 300, 350, 360, 560, 560A, 568, 600 series, 700 series, 760, 760A, 768; nominal 13 x 10 x 2 in, actual 13 x 10 x 1.75 in; replaced annually per Aprilaire's maintenance page) Amazon: https://www.amazon.com/dp/B00DJVIPBS/?tag=ownerspec-20
- **AprilAire Water Panel 35 (pack of 2)**: Same Aprilaire models, two seasons or hard water (Aprilaire shop: same Panel 35 fit list and dimensions; Aprilaire says the panel clogs from residual impurities in the water) Amazon: https://www.amazon.com/dp/B0076OW80S/?tag=ownerspec-20
- **AprilAire Water Panel 45 (pack of 2)**: Aprilaire 400, 400A or 400M owner (Aprilaire shop: fits 400, 400A, 400M, 400KZ, 400MKZ; actual 12.875 x 9.875 x 1.75 in; maintenance page: twice per heating season, so one 2 pack is one season) Amazon: https://www.amazon.com/dp/B00UOXMCAO/?tag=ownerspec-20
- **AprilAire Water Panel 10 (pack of 1)**: Aprilaire 500, 550, 558, 110 or 220 owner (Aprilaire shop: fits 110, 220, 500, 500A, 500M, 550, 550A, 558; nominal 10 x 10 x 2 in, actual 9.75 x 9.5 x 1.75 in; annually per the maintenance page) Amazon: https://www.amazon.com/dp/B0076OW93Y/?tag=ownerspec-20
- **AprilAire Water Panel 10 (pack of 2)**: Same Aprilaire 500-series models, two seasons (Aprilaire shop: same Panel 10 fit list and dimensions) Amazon: https://www.amazon.com/dp/B00KMSP4TM/?tag=ownerspec-20
- **AprilAire Water Panel 12 (pack of 1)**: Aprilaire 224, 225, 440, 445 or 448 owner (Aprilaire shop: fits 112, 136, 224, 225, 440, 445, 445A, 448; nominal 15 x 12 x 2 in, actual 14.75 x 11.5 x 1.75 in) Amazon: https://www.amazon.com/dp/B0085ZISQU/?tag=ownerspec-20
- **Honeywell Home HC26P whole-house humidifier pad**: Honeywell HE280 or HE260A owner (HE240/HE280 manual: HC26P is the HE280 pad, replaced annually, sooner on hard water; Resideo: HC26P1002/U is a 10 x 13 x 1.5 in paper pad for the HE260A) Amazon: https://www.amazon.com/dp/B001QOGNJG/?tag=ownerspec-20
- **Vornado MD1-0034 wick (2 pack)**: Vornado EV100, EV200, EVDC300, EVDC500, Evap2 or Evap40 owner (Vornado: 1 in thick, fits EV100, EV200, EVDC300, EVDC500, Evap2, Evap40 and Baby HUEY; replace every 4 to 8 weeks depending on use) Amazon: https://www.amazon.com/dp/B01J664VSA/?tag=ownerspec-20
- **Vornado MD1-0002 wick (2 pack)**: Vornado Evap1, Evap3, EV3, EV5, Model 30 or Model 50 owner (Vornado MD1-0001 page: 1.5 in thick, fits Evap3, Evap1, Model 30, Model 50, EV3, EV5, and is the same wick as MD1-0002; every 4 to 8 weeks) Amazon: https://www.amazon.com/dp/B000E1385Y/?tag=ownerspec-20
- **AIRCARE 1043 SuperWick (1)**: AIRCARE EP9500, EP9700, EP9800, 831000 or 836000 owner (AIRCARE: fits 14 AIRCARE and 4 Bemis console models, 11 x 12 x 4 in; the listing title calls it a Space Saver Wick; AIRCARE prints no interval) Amazon: https://www.amazon.com/dp/B015WYAQLQ/?tag=ownerspec-20
- **AIRCARE 1043 SuperWick (2)**: Same AIRCARE models, two wicks (AIRCARE: same 1043 fit list; 30-day warranty printed on the maker page) Amazon: https://www.amazon.com/dp/B07NPYTDRD/?tag=ownerspec-20
- **Canopy Bedside Humidifier filter (3 pack)**: Canopy Bedside or Nursery Humidifier owner (Canopy manual: replace the filter every 5 to 7 weeks, a Filter light comes on when due; Canopy page: wood pulp paper, subscription ships every 45 days) Amazon: https://www.amazon.com/dp/B0FLMBXL6Z/?tag=ownerspec-20

## Frequently asked questions

### Does the Honeywell Filter A fit the HEV615 or HEV620 tower?

No. Honeywell's Filter A page lists the HCM-300, 500, 600, 700, 1000 and 2000 series plus the HEV-312 and HEV-355, and never names an HEV600 model. The HEV615 and HEV620 take Filter T, part HFT600PF1V2, and Honeywell's Filter T page lists only those six top-fill towers. The two wicks are not interchangeable, so read the model label before ordering.

### How often does an Aprilaire water panel need replacing?

Aprilaire's maintenance page says to replace the water panel annually for Models 300, 500, 600, 700 and 720, and twice per heating season for Model 400. The individual panel pages print no month figure; they say the panel gets clogged from residual impurities in the water. Hard water shortens the interval, so a 400 owner buys two panels for one season.

### Which Aprilaire water panel fits the 600 and 700?

Water Panel 35. Aprilaire's shop page lists it for the 300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 600MKZ, 600KZ, 700, 700A, 700M, 700KZ, 700MKZ, 760, 760A and 768, at a nominal 13 x 10 x 2 in and an actual 13 x 10 x 1.75 in. Aprilaire's Water Panel Guide names the EZ kits H735EZ1A for the 700 series and H635EZ1A for the 600 series.

### Does the Levoit LV600HH or OasisMist need a filter?

The LV600HH does not: Levoit's product page prints Filterless Design. For the OasisMist 450S and 1000S, Dual 150 and 200S, Classic 160 and 300S and LV600S, Levoit's VeSync page sells an optional demineralization cartridge, with no interval printed and no statement that it is required. There is no wick to match on any Levoit ultrasonic model.

### What is the Honeywell HC26P pad and which humidifier takes it?

The HE240 and HE280 installation guide (69-2685ES-01) prints HC22P as the pad for the HE240 and HC26P for the HE280, and Honeywell recommends replacing the pad annually, sooner on hard water. Resideo lists HC26P1002/U as a 10 x 13 x 1.5 in paper pad with an antimicrobial coating for the HE260A; Honeywell Home lists it as 10.06 x 13 x 1.63 in.


## Sources

- [Honeywell Store, HAC-504 Filter A page (HAC504PF1V2)](https://www.honeywellstore.com/store/products/honeywell-hac-504aw-humidifier-replacement-filter-air-washing-prefilter.htm) (manufacturer or vendor document)
- [Honeywell, HCM-350 series owner's manual (PDF)](https://www.honeywellstore.com/store/images/pdf/honeywell-hcm-350-humidifier-manual.pdf) (manufacturer or vendor document)
- [Honeywell Store, HFT600 Filter T 1-pack page](https://www.honeywellstore.com/store/products/honeywell-replacement-filter-hft600pdq-for-hev615-and-hev620-humidifiers.htm) (manufacturer or vendor document)
- [Honeywell Store, HFT600 Filter T 2-pack page](https://www.honeywellstore.com/store/products/honeywell-hft600-filter-t-2-pack.htm) (manufacturer or vendor document)
- [Honeywell Store, HC-14 Filter E page](https://www.honeywellstore.com/store/products/honeywell-hc-14-replacement-humidifier-filter-e-3-pack-hc14pf3.htm) (manufacturer or vendor document)
- [Honeywell Store, HAC700PDQV1 Filter B page](https://www.honeywellstore.com/store/products/replacement-filter-b-for-the-hcm-750-humidifier-hac700pdqv1.htm) (manufacturer or vendor document)
- [Honeywell, HE240/HE280 installation guide and owner's manual 69-2685ES-01 (PDF)](https://www.honeywellstore.com/store/images/pdf/he240-he280-honeywell-humidifier-installation-and-owners-manual.pdf) (manufacturer or vendor document)
- [Resideo, HC26P1002/U bypass humidifier pad](https://www.resideo.com/us/en/pro/products/air/air-quality-solutions/humidification/humidifier-filters/10-in-x-13-in-x-15-in-bypass-humidifier-pad-hc26p1002-u/) (manufacturer or vendor document)
- [Honeywell Home, HC26P1002/U standard replacement humidifier pad](https://www.honeywellhome.com/products/standard-replacement-humidifier-pad) (manufacturer or vendor document)
- [AprilAire shop, Humidifier Maintenance page](https://shop.aprilaire.com/pages/humidifier-maintenance) (manufacturer or vendor document)
- [AprilAire shop, Water Panel 35](https://shop.aprilaire.com/products/aprilaire-water-panel-35) (manufacturer or vendor document)
- [AprilAire shop, Water Panel 45](https://shop.aprilaire.com/products/aprilaire-water-panel-45) (manufacturer or vendor document)
- [AprilAire shop, Water Panel 10](https://shop.aprilaire.com/products/aprilaire-water-panel-10) (manufacturer or vendor document)
- [AprilAire shop, Water Panel 12](https://shop.aprilaire.com/products/aprilaire-water-panel-12) (manufacturer or vendor document)
- [AprilAire, Water Panel Guide](https://www.aprilaire.com/whole-house-products/water-panel-guide) (manufacturer or vendor document)
- [Vornado, MD1-0034 humidifier wick](https://vornado.com/products/md1-0034-humidifier-wick-2-pack-1) (manufacturer or vendor document)
- [Vornado, MD1-0001 humidifier wick](https://vornado.com/products/md1-0001-humidifier-wick-2-pack) (manufacturer or vendor document)
- [AIRCARE, 1043 SuperWick product page](https://www.aircare.com/product-page/1043) (manufacturer or vendor document)
- [AIRCARE, Wicks and Filters category](https://www.aircare.com/category/wicks-filters) (manufacturer or vendor document)
- [Canopy, Bedside Humidifier user manual (PDF)](https://cdn.shopify.com/s/files/1/0467/0128/1438/files/Bedside_Humidifier_Instruction_Guide.pdf) (manufacturer or vendor document)
- [Canopy, Humidifier Replacement Filter page](https://getcanopy.co/products/filter) (manufacturer or vendor document)
- [Levoit, LV600HH product page](https://levoit.com/products/lv600hh-hybrid-ultrasonic-humidifier) (manufacturer or vendor document)
- [Levoit (VeSync), humidifier cartridge page](https://us.vesync.com/product-detail/levoit-humidifier-water-softener-624) (manufacturer or vendor document)

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Citation: OwnerSpec, "Humidifier Filter by Model: Honeywell Filter A to Aprilaire Water Panel 35, the Wick or Panel Part Number and the Interval the Maker Prints", https://ownerspec.com/air/parts/humidifier-filter-by-model/, facts verified 2 October 2026.
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