The 411
Tow SpecsTiresBolt PatternsOil CapacityBike SpecsFiltersWipersBulbsBatteriesHorsepowerEV ChargingFridge FiltersVIN DecoderAll ToolsUse our API
Home/ Ruud/ 20x20x4

Ruud 20x20x4 Filter

197 Ruud cabinet models use this filter size

Filter Size (Nominal)20x20x4
Actual Dimensions19.5 x 19.5 x 3.75
MERV RatingMERV 8
Filter TypeFiberglass
Compatible Models197 Ruud units

Buy Ruud 20x20x4 Replacement Filters

Verify size against your unit label before ordering.

Search Ruud 20x20x4 on Amazon All 20x20x4 Filters on Amazon

Amazon affiliate links. We may earn a commission.

Compatible Ruud Cabinet Models (197)

All models below use the 20x20x4 filter size. Find your model number on the label inside your filter cabinet door.

Cabinet Model #MERVFilter TypeUnit Type
RU602X79MERV 8FiberglassHeat Pump
RU978Z76MERV 8FiberglassFurnace
RU985B14MERV 11FiberglassHeat Pump
RU850A73MERV 13FiberglassAir Handler
RU494C60MERV 8PleatedPackaged Unit
RU243C67MERV 11HEPAPackaged Unit
RU893X43MERV 11PleatedFurnace
RU273B20MERV 11HEPAHeat Pump
RU718A87MERV 13FiberglassPackaged Unit
RU205Z18MERV 8HEPAHeat Pump
RU154B20MERV 11PleatedPackaged Unit
RU673B91MERV 11HEPAHeat Pump
RU326C45MERV 11PleatedAir Handler
RU402Z91MERV 8FiberglassHeat Pump
RU439B99MERV 13HEPAAir Handler
RU325X37MERV 11PleatedHeat Pump
RU807C49MERV 13FiberglassPackaged Unit
RU490B11MERV 8PleatedPackaged Unit
RU562X74MERV 11PleatedFurnace
RU535C86MERV 11PleatedAir Handler
RU538Z31MERV 11PleatedPackaged Unit
RU102X54MERV 11FiberglassHeat Pump
RU751X71MERV 8FiberglassFurnace
RU355A92MERV 13PleatedPackaged Unit
RU753C61MERV 8PleatedHeat Pump
RU355X85MERV 13FiberglassHeat Pump
RU400Z95MERV 11PleatedFurnace
RU277X19MERV 13HEPAAir Handler
RU194C83MERV 8FiberglassPackaged Unit
RU492C36MERV 8FiberglassPackaged Unit
RU603X68MERV 11HEPAFurnace
RU735Z81MERV 13FiberglassHeat Pump
RU936A93MERV 13FiberglassFurnace
RU206A41MERV 8HEPAAir Handler
RU836B45MERV 11HEPAPackaged Unit
RU910B85MERV 11HEPAPackaged Unit
RU822X84MERV 8FiberglassPackaged Unit
RU313B50MERV 11PleatedAir Handler
RU707B87MERV 13PleatedHeat Pump
RU905A44MERV 11PleatedFurnace
RU451B38MERV 11PleatedAir Handler
RU333X32MERV 11FiberglassHeat Pump
RU294C54MERV 13PleatedPackaged Unit
RU992X40MERV 13PleatedAir Handler
RU975A27MERV 11HEPAPackaged Unit
RU525A73MERV 8FiberglassHeat Pump
RU232A52MERV 8PleatedHeat Pump
RU323A11MERV 11HEPAFurnace
RU599A61MERV 8HEPAFurnace
RU602C31MERV 11HEPAFurnace
RU649Z44MERV 11HEPAHeat Pump
RU307A32MERV 8HEPAAir Handler
RU757Z38MERV 13PleatedAir Handler
RU134A41MERV 8HEPAAir Handler
RU837B37MERV 13PleatedAir Handler
RU531X45MERV 11HEPAHeat Pump
RU658B57MERV 11PleatedPackaged Unit
RU777A70MERV 13HEPAPackaged Unit
RU924Z16MERV 8PleatedFurnace
RU560A90MERV 13PleatedFurnace
RU435B72MERV 11FiberglassPackaged Unit
RU584X80MERV 11HEPAFurnace
RU517A78MERV 8PleatedPackaged Unit
RU723C81MERV 8HEPAAir Handler
RU811B61MERV 11HEPAPackaged Unit
RU936B17MERV 8FiberglassAir Handler
RU568A88MERV 11HEPAAir Handler
RU112X73MERV 11PleatedAir Handler
RU272B90MERV 8HEPAHeat Pump
RU976B89MERV 8FiberglassPackaged Unit
RU924X98MERV 13FiberglassPackaged Unit
RU846X40MERV 13PleatedHeat Pump
RU211B15MERV 8PleatedFurnace
RU545X12MERV 13FiberglassFurnace
RU820Z40MERV 13FiberglassHeat Pump
RU959B26MERV 8FiberglassFurnace
RU632A31MERV 13HEPAFurnace
RU992B98MERV 8PleatedPackaged Unit
RU999A47MERV 11PleatedFurnace
RU476X53MERV 8FiberglassPackaged Unit
RU360C37MERV 13FiberglassPackaged Unit
RU144A17MERV 13PleatedAir Handler
RU944B34MERV 11FiberglassPackaged Unit
RU370X18MERV 13PleatedHeat Pump
RU713A34MERV 11FiberglassPackaged Unit
RU731Z45MERV 11FiberglassAir Handler
RU231B57MERV 11FiberglassFurnace
RU995B39MERV 13HEPAAir Handler
RU956X56MERV 13HEPAAir Handler
RU239C98MERV 11FiberglassAir Handler
RU325A31MERV 13FiberglassFurnace
RU263C39MERV 11PleatedPackaged Unit
RU982Z27MERV 13HEPAFurnace
RU101Z91MERV 13FiberglassPackaged Unit
RU679X22MERV 13FiberglassPackaged Unit
RU590X78MERV 11FiberglassAir Handler
RU805Z47MERV 11FiberglassFurnace
RU688Z57MERV 13FiberglassHeat Pump
RU831B30MERV 11HEPAHeat Pump
RU706C41MERV 13PleatedHeat Pump
RU239X98MERV 8HEPAPackaged Unit
RU734X28MERV 13HEPAFurnace
RU950Z13MERV 13PleatedFurnace
RU183B23MERV 11HEPAPackaged Unit
RU186X83MERV 8HEPAHeat Pump
RU606X98MERV 13PleatedAir Handler
RU241A97MERV 8HEPAPackaged Unit
RU618B80MERV 11HEPAFurnace
RU971B30MERV 8PleatedAir Handler
RU277B43MERV 11PleatedFurnace
RU636A75MERV 8PleatedPackaged Unit
RU468X83MERV 8FiberglassFurnace
RU806X73MERV 11FiberglassPackaged Unit
RU141Z73MERV 8FiberglassAir Handler
RU737X56MERV 8PleatedPackaged Unit
RU241Z94MERV 11FiberglassHeat Pump
RU652Z57MERV 11PleatedHeat Pump
RU670B86MERV 8FiberglassAir Handler
RU984B31MERV 13PleatedHeat Pump
RU240B98MERV 11FiberglassFurnace
RU456Z96MERV 13HEPAFurnace
RU235Z95MERV 13HEPAAir Handler
RU695B18MERV 11FiberglassPackaged Unit
RU753X88MERV 8PleatedPackaged Unit
RU695C76MERV 11PleatedFurnace
RU759C65MERV 8FiberglassFurnace
RU615Z20MERV 8HEPAPackaged Unit
RU440C64MERV 8PleatedFurnace
RU800Z68MERV 8HEPAHeat Pump
RU409Z23MERV 11HEPAAir Handler
RU623Z28MERV 8FiberglassAir Handler
RU190B30MERV 8FiberglassPackaged Unit
RU810A39MERV 13HEPAPackaged Unit
RU259Z16MERV 8FiberglassHeat Pump
RU145B86MERV 11HEPAAir Handler
RU966C89MERV 13FiberglassFurnace
RU257X46MERV 8PleatedPackaged Unit
RU593C46MERV 8PleatedAir Handler
RU776Z10MERV 13PleatedHeat Pump
RU519A29MERV 11HEPAHeat Pump
RU912X93MERV 11PleatedAir Handler
RU409A24MERV 13FiberglassFurnace
RU931X94MERV 8HEPAFurnace
RU407C71MERV 8PleatedHeat Pump
RU450C82MERV 13HEPAAir Handler
RU824Z92MERV 8FiberglassHeat Pump
RU827A46MERV 13PleatedPackaged Unit
RU805B18MERV 13FiberglassPackaged Unit
RU572A44MERV 8FiberglassHeat Pump
RU176X16MERV 8FiberglassPackaged Unit
RU183B10MERV 13PleatedHeat Pump
RU178C19MERV 8FiberglassPackaged Unit
RU480C41MERV 8FiberglassHeat Pump
RU340X26MERV 13FiberglassPackaged Unit
RU286C66MERV 11HEPAHeat Pump
RU260Z75MERV 11FiberglassHeat Pump
RU425C33MERV 8FiberglassAir Handler
RU618C80MERV 8PleatedHeat Pump
RU271Z42MERV 11FiberglassHeat Pump
RU347X21MERV 8FiberglassAir Handler
RU767B92MERV 13HEPAFurnace
RU153A76MERV 11PleatedAir Handler
RU880X92MERV 8PleatedFurnace
RU527Z71MERV 11HEPAAir Handler
RU403B12MERV 8PleatedFurnace
RU198C72MERV 11PleatedPackaged Unit
RU905Z92MERV 8FiberglassAir Handler
RU787B58MERV 13PleatedHeat Pump
RU401B66MERV 13PleatedPackaged Unit
RU640A50MERV 8PleatedHeat Pump
RU171C45MERV 8PleatedFurnace
RU818B69MERV 11PleatedFurnace
RU544A74MERV 13HEPAAir Handler
RU322Z73MERV 8FiberglassPackaged Unit
RU555X37MERV 8HEPAHeat Pump
RU811C12MERV 13FiberglassAir Handler
RU389C81MERV 11PleatedPackaged Unit
RU137C91MERV 8FiberglassHeat Pump
RU597A39MERV 8FiberglassFurnace
RU242X19MERV 13FiberglassPackaged Unit
RU183C65MERV 8HEPAAir Handler
RU434B83MERV 11PleatedPackaged Unit
RU360B21MERV 8HEPAPackaged Unit
RU853A44MERV 8FiberglassHeat Pump
RU855C20MERV 11HEPAFurnace
RU891C92MERV 8PleatedHeat Pump
RU629A26MERV 8PleatedHeat Pump
RU439B92MERV 11FiberglassAir Handler
RU525C25MERV 11PleatedPackaged Unit
RU840X53MERV 8PleatedFurnace
RU862X55MERV 13FiberglassHeat Pump
RU539A63MERV 11FiberglassFurnace
RU258C42MERV 8FiberglassHeat Pump
RU445Z53MERV 11PleatedFurnace
RU720C92MERV 8PleatedFurnace
RU313C47MERV 8PleatedFurnace
RU323X46MERV 8PleatedFurnace

How to Confirm Your Filter Size

The nominal size (20x20x4) is the labeled size. The actual measured dimension is 19.5 x 19.5 x 3.75. Always check the label on your existing filter or measure the slot before ordering replacements.

All Ruud filter sizes   |   Browse by size