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Home/ Rheem/ 18x20x1

Rheem 18x20x1 Filter

299 Rheem cabinet models use this filter size

Filter Size (Nominal)18x20x1
Actual Dimensions17.5 x 19.5 x 0.75
MERV RatingMERV 11
Filter TypeHEPA
Compatible Models299 Rheem units

Buy Rheem 18x20x1 Replacement Filters

Verify size against your unit label before ordering.

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Compatible Rheem Cabinet Models (299)

All models below use the 18x20x1 filter size. Find your model number on the label inside your filter cabinet door.

Cabinet Model #MERVFilter TypeUnit Type
RH428B18MERV 11HEPAFurnace
RH981X79MERV 11FiberglassFurnace
RH133C13MERV 13HEPAAir Handler
RH166X94MERV 11PleatedHeat Pump
RH496C53MERV 8HEPAAir Handler
RH333A63MERV 11FiberglassFurnace
RH594X11MERV 11PleatedAir Handler
RH461B10MERV 11HEPAHeat Pump
RH820X17MERV 11HEPAFurnace
RH469B95MERV 11PleatedAir Handler
RH408C65MERV 11HEPAFurnace
RH543Z92MERV 13FiberglassHeat Pump
RH991B92MERV 11HEPAHeat Pump
RH934X99MERV 11HEPAPackaged Unit
RH180A93MERV 8HEPAFurnace
RH694C84MERV 11FiberglassPackaged Unit
RH307B59MERV 11PleatedHeat Pump
RH232A45MERV 13HEPAPackaged Unit
RH907B17MERV 8FiberglassPackaged Unit
RH379X99MERV 11PleatedFurnace
RH797A31MERV 13HEPAPackaged Unit
RH951Z77MERV 8FiberglassHeat Pump
RH257X84MERV 13PleatedFurnace
RH286C99MERV 13HEPAFurnace
RH349B79MERV 11FiberglassPackaged Unit
RH866Z97MERV 8PleatedAir Handler
RH723A62MERV 8HEPAAir Handler
RH977X32MERV 13HEPAHeat Pump
RH755B27MERV 8FiberglassFurnace
RH143Z42MERV 13HEPAFurnace
RH558B52MERV 8PleatedHeat Pump
RH966Z59MERV 11FiberglassFurnace
RH859B41MERV 11FiberglassFurnace
RH242A43MERV 8PleatedPackaged Unit
RH780C18MERV 11HEPAFurnace
RH111B96MERV 13HEPAAir Handler
RH283Z24MERV 11HEPAFurnace
RH858C84MERV 13PleatedAir Handler
RH372X80MERV 13PleatedPackaged Unit
RH240X48MERV 8PleatedHeat Pump
RH291Z41MERV 13PleatedHeat Pump
RH541X40MERV 8PleatedFurnace
RH755C84MERV 8HEPAPackaged Unit
RH377A37MERV 13FiberglassAir Handler
RH227B97MERV 11PleatedAir Handler
RH957X27MERV 13HEPAHeat Pump
RH213A74MERV 13HEPAPackaged Unit
RH464C93MERV 8PleatedPackaged Unit
RH255Z28MERV 13HEPAAir Handler
RH976C27MERV 8HEPAHeat Pump
RH488C80MERV 13HEPAHeat Pump
RH273A33MERV 11PleatedPackaged Unit
RH692A53MERV 13FiberglassPackaged Unit
RH977X65MERV 13PleatedAir Handler
RH630B50MERV 13HEPAFurnace
RH641B36MERV 13FiberglassAir Handler
RH219Z90MERV 8FiberglassFurnace
RH255X12MERV 11PleatedFurnace
RH277A40MERV 11FiberglassHeat Pump
RH673Z71MERV 11FiberglassAir Handler
RH864C50MERV 13HEPAAir Handler
RH847B85MERV 11FiberglassAir Handler
RH964X25MERV 8FiberglassHeat Pump
RH742C21MERV 13PleatedPackaged Unit
RH507C20MERV 13FiberglassFurnace
RH748Z86MERV 8PleatedHeat Pump
RH712Z86MERV 8HEPAPackaged Unit
RH281B66MERV 13HEPAHeat Pump
RH484A72MERV 8HEPAAir Handler
RH513A85MERV 8HEPAFurnace
RH305C13MERV 8PleatedHeat Pump
RH230Z91MERV 11HEPAAir Handler
RH132A55MERV 13PleatedPackaged Unit
RH284A22MERV 11HEPAHeat Pump
RH669B24MERV 11HEPAAir Handler
RH351X77MERV 13FiberglassHeat Pump
RH469A12MERV 13FiberglassHeat Pump
RH939Z72MERV 8HEPAHeat Pump
RH137A64MERV 8PleatedPackaged Unit
RH883A80MERV 11PleatedFurnace
RH378Z19MERV 11FiberglassAir Handler
RH587A31MERV 11HEPAPackaged Unit
RH738C46MERV 8PleatedAir Handler
RH628Z66MERV 11HEPAAir Handler
RH342C74MERV 8HEPAFurnace
RH152B80MERV 8HEPAHeat Pump
RH979C45MERV 13PleatedAir Handler
RH116C11MERV 13HEPAFurnace
RH498Z14MERV 8FiberglassPackaged Unit
RH572C12MERV 8HEPAAir Handler
RH985A75MERV 13PleatedHeat Pump
RH843B45MERV 11HEPAPackaged Unit
RH273C56MERV 11FiberglassPackaged Unit
RH688X26MERV 13HEPAHeat Pump
RH343B12MERV 8HEPAAir Handler
RH807C66MERV 11PleatedFurnace
RH466B55MERV 13PleatedPackaged Unit
RH100A24MERV 8FiberglassHeat Pump
RH150A88MERV 8HEPAAir Handler
RH143C70MERV 11PleatedAir Handler
RH571A98MERV 8PleatedHeat Pump
RH269Z16MERV 8PleatedPackaged Unit
RH530B79MERV 13HEPAHeat Pump
RH500C82MERV 11PleatedHeat Pump
RH226Z88MERV 11PleatedHeat Pump
RH578B60MERV 13FiberglassFurnace
RH361C16MERV 13PleatedFurnace
RH152B14MERV 11FiberglassFurnace
RH139B61MERV 13PleatedPackaged Unit
RH189A70MERV 13PleatedPackaged Unit
RH978Z59MERV 13HEPAHeat Pump
RH715C88MERV 8FiberglassPackaged Unit
RH118B12MERV 11FiberglassHeat Pump
RH452Z33MERV 13FiberglassPackaged Unit
RH383X22MERV 8HEPAHeat Pump
RH345A66MERV 11HEPAPackaged Unit
RH513A96MERV 8PleatedPackaged Unit
RH701A76MERV 8FiberglassPackaged Unit
RH188C95MERV 11FiberglassPackaged Unit
RH577C31MERV 13FiberglassPackaged Unit
RH317X61MERV 13HEPAHeat Pump
RH676X41MERV 11HEPAHeat Pump
RH359B37MERV 8FiberglassPackaged Unit
RH611X75MERV 11HEPAFurnace
RH723A32MERV 13PleatedFurnace
RH947A93MERV 13FiberglassFurnace
RH801Z77MERV 11HEPAHeat Pump
RH611C62MERV 8FiberglassHeat Pump
RH682Z80MERV 13FiberglassFurnace
RH117A22MERV 11FiberglassFurnace
RH677A80MERV 11HEPAAir Handler
RH230X84MERV 8HEPAHeat Pump
RH734A33MERV 13HEPAHeat Pump
RH423X86MERV 11FiberglassFurnace
RH996A76MERV 13HEPAHeat Pump
RH758Z79MERV 8PleatedFurnace
RH700Z40MERV 13FiberglassAir Handler
RH927X26MERV 11FiberglassAir Handler
RH347B76MERV 13HEPAPackaged Unit
RH357Z77MERV 13PleatedPackaged Unit
RH954Z64MERV 11FiberglassAir Handler
RH585X10MERV 13PleatedPackaged Unit
RH684C44MERV 8PleatedFurnace
RH247C32MERV 13HEPAAir Handler
RH957Z90MERV 11HEPAFurnace
RH854X93MERV 11PleatedHeat Pump
RH733X19MERV 8FiberglassFurnace
RH731A20MERV 8HEPAHeat Pump
RH264X37MERV 11FiberglassHeat Pump
RH297B93MERV 13FiberglassHeat Pump
RH698C45MERV 11HEPAPackaged Unit
RH503A64MERV 11HEPAAir Handler
RH724B61MERV 11PleatedAir Handler
RH533A13MERV 11HEPAFurnace
RH821Z91MERV 13FiberglassAir Handler
RH939C18MERV 13FiberglassPackaged Unit
RH596X10MERV 8HEPAFurnace
RH440B12MERV 8PleatedFurnace
RH484X51MERV 11PleatedHeat Pump
RH453X49MERV 13PleatedHeat Pump
RH263A47MERV 8HEPAFurnace
RH402X38MERV 8FiberglassHeat Pump
RH855B85MERV 11FiberglassAir Handler
RH551B25MERV 11FiberglassFurnace
RH615A21MERV 13PleatedPackaged Unit
RH137Z37MERV 13PleatedHeat Pump
RH140C78MERV 13HEPAAir Handler
RH752B44MERV 8FiberglassHeat Pump
RH795Z27MERV 11HEPAAir Handler
RH231A30MERV 13HEPAFurnace
RH158A96MERV 8HEPAAir Handler
RH937X16MERV 13FiberglassAir Handler
RH397C38MERV 13FiberglassPackaged Unit
RH506B91MERV 8FiberglassHeat Pump
RH904Z53MERV 11FiberglassFurnace
RH180C46MERV 11PleatedPackaged Unit
RH617X65MERV 11FiberglassFurnace
RH139B25MERV 8HEPAPackaged Unit
RH699Z84MERV 8PleatedAir Handler
RH285C96MERV 13HEPAAir Handler
RH534X65MERV 8PleatedAir Handler
RH753A83MERV 13PleatedPackaged Unit
RH145C61MERV 11FiberglassAir Handler
RH819X77MERV 8PleatedPackaged Unit
RH100A29MERV 8HEPAPackaged Unit
RH466B97MERV 13FiberglassAir Handler
RH236X71MERV 8FiberglassFurnace
RH642A33MERV 13FiberglassPackaged Unit
RH897X10MERV 11PleatedPackaged Unit
RH417C37MERV 8FiberglassPackaged Unit
RH611Z74MERV 11PleatedPackaged Unit
RH972B34MERV 13HEPAHeat Pump
RH512X85MERV 13FiberglassFurnace
RH509A53MERV 13HEPAHeat Pump
RH288B79MERV 11PleatedFurnace
RH327Z60MERV 11FiberglassAir Handler
RH787A68MERV 8HEPAAir Handler
RH199B60MERV 11FiberglassAir Handler
RH499C16MERV 8FiberglassAir Handler
RH831Z95MERV 13HEPAPackaged Unit
RH654C81MERV 8PleatedFurnace
RH267X85MERV 13HEPAHeat Pump
RH690X87MERV 13HEPAPackaged Unit
RH165A25MERV 13FiberglassHeat Pump
RH336B91MERV 11PleatedPackaged Unit
RH444A40MERV 8HEPAAir Handler
RH674B65MERV 8HEPAFurnace
RH696C35MERV 11PleatedPackaged Unit
RH285C80MERV 13PleatedPackaged Unit
RH540C89MERV 13PleatedPackaged Unit
RH363X93MERV 8FiberglassAir Handler
RH403A29MERV 8HEPAAir Handler
RH456C19MERV 11FiberglassAir Handler
RH175X39MERV 13FiberglassAir Handler
RH736B19MERV 8FiberglassAir Handler
RH212B95MERV 8PleatedFurnace
RH560A50MERV 13HEPAHeat Pump
RH640A69MERV 11FiberglassFurnace
RH871A98MERV 13PleatedFurnace
RH889A77MERV 13FiberglassPackaged Unit
RH303Z62MERV 13HEPAHeat Pump
RH394B29MERV 8FiberglassAir Handler
RH836X38MERV 13HEPAHeat Pump
RH415A90MERV 11HEPAHeat Pump
RH706Z26MERV 11FiberglassHeat Pump
RH537A49MERV 8PleatedPackaged Unit
RH932B72MERV 8PleatedAir Handler
RH318Z93MERV 8FiberglassHeat Pump
RH528A77MERV 11FiberglassHeat Pump
RH970X43MERV 8PleatedAir Handler
RH103B91MERV 11HEPAPackaged Unit
RH580X51MERV 11FiberglassAir Handler
RH815A59MERV 8PleatedPackaged Unit
RH193A83MERV 8PleatedFurnace
RH604Z14MERV 11HEPAFurnace
RH501C67MERV 11HEPAFurnace
RH668X20MERV 13FiberglassPackaged Unit
RH577B25MERV 11PleatedFurnace
RH915B11MERV 13PleatedAir Handler
RH383C10MERV 8PleatedHeat Pump
RH145Z11MERV 8FiberglassAir Handler
RH151C21MERV 13FiberglassHeat Pump
RH172C28MERV 11PleatedPackaged Unit
RH360X24MERV 8FiberglassAir Handler
RH755B88MERV 8FiberglassPackaged Unit
RH265A33MERV 11FiberglassAir Handler
RH943Z94MERV 13PleatedAir Handler
RH730B60MERV 13PleatedHeat Pump
RH499Z75MERV 11PleatedHeat Pump
RH354X53MERV 11FiberglassFurnace
RH469B18MERV 13HEPAFurnace
RH441B54MERV 13HEPAFurnace
RH641A46MERV 11PleatedHeat Pump
RH929Z84MERV 13HEPAFurnace
RH333B99MERV 13PleatedPackaged Unit
RH313Z62MERV 11PleatedAir Handler
RH941C12MERV 13FiberglassFurnace
RH281A82MERV 8PleatedHeat Pump
RH794C50MERV 8FiberglassAir Handler
RH965Z51MERV 8FiberglassPackaged Unit
RH760B51MERV 11FiberglassFurnace
RH256Z29MERV 11FiberglassPackaged Unit
RH212B95MERV 11FiberglassPackaged Unit
RH314A60MERV 8PleatedHeat Pump
RH995B19MERV 13FiberglassHeat Pump
RH568A13MERV 8FiberglassPackaged Unit
RH328Z20MERV 8PleatedHeat Pump
RH632Z63MERV 13PleatedHeat Pump
RH795B74MERV 11FiberglassPackaged Unit
RH753A92MERV 8HEPAPackaged Unit
RH865X26MERV 8HEPAPackaged Unit
RH716Z45MERV 8HEPAPackaged Unit
RH202A56MERV 13HEPAHeat Pump
RH246C72MERV 8HEPAAir Handler
RH762X47MERV 8HEPAAir Handler
RH371X10MERV 11HEPAPackaged Unit
RH737B48MERV 13PleatedFurnace
RH561A82MERV 8FiberglassFurnace
RH815X83MERV 11PleatedAir Handler
RH233X88MERV 8FiberglassFurnace
RH418A95MERV 8FiberglassPackaged Unit
RH121B16MERV 13FiberglassHeat Pump
RH823Z20MERV 8PleatedHeat Pump
RH575A95MERV 11HEPAAir Handler
RH407Z33MERV 11PleatedFurnace
RH840C48MERV 8HEPAHeat Pump
RH370Z16MERV 8PleatedHeat Pump
RH742B86MERV 13PleatedFurnace
RH350Z44MERV 13HEPAHeat Pump
RH928C84MERV 13HEPAAir Handler
RH305B95MERV 11HEPAFurnace
RH815B89MERV 8PleatedFurnace
RH222Z48MERV 13PleatedAir Handler
RH622X80MERV 11FiberglassPackaged Unit
RH107A48MERV 13FiberglassHeat Pump
RH758Z37MERV 11HEPAPackaged Unit
RH169A52MERV 13PleatedHeat Pump
RH101A36MERV 13FiberglassAir Handler
RH485Z11MERV 13HEPAHeat Pump

How to Confirm Your Filter Size

The nominal size (18x20x1) is the labeled size. The actual measured dimension is 17.5 x 19.5 x 0.75. Always check the label on your existing filter or measure the slot before ordering replacements.

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