Photo may vary slightly — verify by part number before ordering.59P503B02 — WaterFurnace 20W X20H X1D Filter Pleated Disposable MERV 8
In stock and ordered before 1pm ET, Mon–Fri? It ships the same day from our US warehouse.
Not sure it's the right part? Send the model and serial — help@totalhvacparts.com or 302-219-4994.
Need more than 10? Ask about factory lead time — we'll give you a real date, not a guess.
Overview
WaterFurnace 59P503B02 — 20W X20H X1D Filter Pleated Disposable MERV 8. A filter removes dirt, moisture or contaminants from the air, refrigerant or oil passing through it.
Fits this WaterFurnace unit: NSH048EL402CBNN61SSA (1 model; the Fits These Units list below is complete). These are the units we've confirmed — not necessarily the only ones. Send us the model and serial number if yours isn't listed.
Genuine WaterFurnace OEM part — not an aftermarket substitute.
What is WaterFurnace 59P503B02?
It is a genuine WaterFurnace OEM filter, listed by WaterFurnace as “20W X20H X1D Filter Pleated Disposable MERV 8”. Listed specifications: Dimensions 20 x 20 x 1 in; Filter Rating MERV 8.
Which WaterFurnace units use 59P503B02?
Confirmed fits include NSH048EL402CBNN61SSA. The Fits These Units list on this page shows all 1 confirmed model.
What are the signs a filter has failed?
A clogged or saturated filter may restrict flow, raise pressure drop or let contaminants through.
Is 59P503B02 a genuine WaterFurnace part?
Yes. 59P503B02 is WaterFurnace's own part number for this item, and this is a genuine OEM part, not an aftermarket substitute. Search or order by this number.
How do I confirm 59P503B02 fits my unit?
Match the part number on your original part, or check your unit's model against the Fits These Units list on this page. Not sure? Send us the model and serial number and we'll confirm before you order.
Fits These Units
Confirmed to fit the WaterFurnace units below — and these are not the only models this part fits. Contact us for the entire compatibility list, or if you don't see your unit, send the model and serial and we'll confirm before you buy.
- NSH048EL402CBNN61SSA
Specifications
Values in italic are not yet confirmed from OEM documentation. Ask us to verify before ordering.
After You Order
Order number and confirmation by email the moment you check out.
Pulled from our shelf — the same live count you saw on this page. In-stock orders placed before 1pm ET, Mon–Fri, leave the same business day.
Tracking number lands in your inbox the moment it leaves the building.
Check the part number on the label against your order before installing. Wrong or damaged? Tell us — we'll sort it out.
Ask the Parts Desk
Not sure this fits? Need more than what's in stock? Send the model and serial from the unit's data plate — a real person reads it and confirms before you order.
Common Questions
Is the stock number on this page real?
Yes — it's the live count from our own shelf, not an availability estimate. If it says 10, that's how many are physically here. When it hits zero, this page says so.
Is this a genuine WaterFurnace part, or aftermarket?
Genuine WaterFurnace OEM equipment sourced through WaterFurnace's authorized parts program — not an aftermarket substitute.
How do I confirm this fits my unit?
Match part number 59P503B02 to your unit's parts diagram. If unsure, send us your model and serial number and we'll verify before you order.
What's the warranty on this part?
Warranty terms vary by manufacturer. Contact us with your order number for details specific to this part.
How fast does this ship?
In-stock items ship the same business day on orders placed before 1pm ET, Monday–Friday. Standard ground delivers to most of the continental US in 2–5 business days. Ships via UPS/FedEx Ground, or truck freight for oversized items. Free standard shipping (US).
Does everything ship UPS or FedEx Ground?
Most orders ship UPS or FedEx Ground. A small number of large or heavy parts across the catalog ship by truck freight instead, and we reach out to arrange a delivery window before those orders leave the warehouse. Oversized items that ship by truck freight are also covered by free standard shipping on orders of $50 or more.
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