AprilAire Water Panel #45
OEM part number(s):
4545RP
Made by AprilAire. Replacement interval: Replace every year or every 6 months (AprilAire guidance)..
Exact fit — verified
Fits 1 models
Across 1 brand(s): AprilAire. Examples: 4000 — the complete verified fit list is on this page.
Cross-brand equivalents
3 verified equivalent(s): BestAir A45; Honeywell HC22E1003; Orzechowski H1071 — full table below.
Prices checked 2026-11-11: genuine from $17.90 + shipping at eBay (Buy It Now listing). Every price in the table below carries its store and checked date.
Amazon is a buy link, not a price claim: Amazon blocks automated price reads, so its price is never quoted here.
Exact fit — all 1 verified models
Harvested from published manufacturer and retailer fit lists (sources at the bottom of this page). If your exact model is not listed, do not assume fit — check the number on your current part.
AprilAire (1)
4000
Aftermarket equivalents
| Brand | Part number | Note |
|---|---|---|
| BestAir | A45 | BestAir aftermarket equivalent (fit verified; no price captured this pass). |
| Honeywell | HC22E1003 | Honeywell lists HC22E1003 as its replacement for the AprilAire 45 — cross-checked against the HC22E record. |
| Orzechowski | H1071 | Aftermarket equivalent. |
All verified prices
| Kind | Store | Pack | Price | Shipping | Checked |
|---|---|---|---|---|---|
| Genuine OEM | eBay (Buy It Now listing) | 1 panel, genuine AprilAire 45 | $17.90 + shipping item $17.90 | eBay listing shipping terms (marketplace; verify before relying) | 2026-11-11 |
| More prices | DiscountFilters | 1 panel, genuine AprilAire 45 | $26.99 + shipping item $26.99 | Free shipping on orders $70+ at DiscountFilters; a fee applies below that | 2026-11-11 |
Genuine prices only: the eBay figure is a marketplace Buy It Now listing, and no established-retailer aftermarket price was captured this pass.
Specs
| Dimensions | 10 × 13 × 1.75 in (DiscountFilters) |
| Replacement interval | Replace every year or every 6 months (AprilAire guidance). |
| Treatment / media | Metal mesh with clay coating; the #45 is the pad used in Aprilaire 5000/6000 electronic air cleaners. |
| Quantity note | Genuine retail 45RP is a 2-pack; watch pack counts when comparing prices. |