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Home/ Ruud/ 18x20x1

Ruud 18x20x1 Filter

263 Ruud cabinet models use this filter size

Filter Size (Nominal)18x20x1
Actual Dimensions17.5 x 19.5 x 0.75
MERV RatingMERV 13
Filter TypeHEPA
Compatible Models263 Ruud units

Buy Ruud 18x20x1 Replacement Filters

Verify size against your unit label before ordering.

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Compatible Ruud Cabinet Models (263)

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
RU870A49MERV 13HEPAFurnace
RU663B16MERV 8PleatedPackaged Unit
RU242C67MERV 8HEPAFurnace
RU379C16MERV 13HEPAPackaged Unit
RU933Z43MERV 11HEPAHeat Pump
RU364Z12MERV 8PleatedPackaged Unit
RU732A35MERV 13FiberglassPackaged Unit
RU253X64MERV 13HEPAHeat Pump
RU313C13MERV 13PleatedAir Handler
RU555C49MERV 11HEPAPackaged Unit
RU235C13MERV 13FiberglassPackaged Unit
RU211B48MERV 13FiberglassAir Handler
RU227A58MERV 11HEPAAir Handler
RU970X91MERV 8HEPAHeat Pump
RU299B91MERV 11PleatedPackaged Unit
RU131C23MERV 13FiberglassAir Handler
RU734X44MERV 11PleatedHeat Pump
RU634Z17MERV 11PleatedFurnace
RU634X79MERV 8PleatedHeat Pump
RU850Z88MERV 13FiberglassHeat Pump
RU620X59MERV 13FiberglassAir Handler
RU353B32MERV 11FiberglassHeat Pump
RU967B34MERV 11FiberglassHeat Pump
RU582Z17MERV 13HEPAFurnace
RU444X67MERV 8PleatedAir Handler
RU964B47MERV 13FiberglassPackaged Unit
RU927B55MERV 8FiberglassAir Handler
RU746C60MERV 13FiberglassFurnace
RU202C59MERV 11FiberglassHeat Pump
RU997B51MERV 11HEPAAir Handler
RU167B50MERV 13FiberglassFurnace
RU116B41MERV 8PleatedPackaged Unit
RU982A91MERV 13HEPAFurnace
RU591A40MERV 8FiberglassAir Handler
RU917B98MERV 11HEPAFurnace
RU848C13MERV 13HEPAPackaged Unit
RU375Z63MERV 8PleatedPackaged Unit
RU233C46MERV 11FiberglassHeat Pump
RU206Z78MERV 11PleatedAir Handler
RU774A73MERV 8FiberglassPackaged Unit
RU331X90MERV 13HEPAAir Handler
RU808Z53MERV 8FiberglassPackaged Unit
RU654C31MERV 11HEPAHeat Pump
RU565C40MERV 8FiberglassAir Handler
RU104B67MERV 13HEPAPackaged Unit
RU816Z29MERV 11PleatedPackaged Unit
RU934C16MERV 11FiberglassPackaged Unit
RU463X17MERV 13HEPAFurnace
RU215C85MERV 8FiberglassAir Handler
RU860B74MERV 13FiberglassAir Handler
RU901C21MERV 8FiberglassHeat Pump
RU526B72MERV 11PleatedPackaged Unit
RU837Z53MERV 8FiberglassPackaged Unit
RU421C37MERV 8HEPAHeat Pump
RU561Z70MERV 11FiberglassPackaged Unit
RU749A43MERV 11FiberglassHeat Pump
RU512A32MERV 8FiberglassFurnace
RU681A40MERV 11PleatedFurnace
RU135C54MERV 13PleatedFurnace
RU279B55MERV 13HEPAHeat Pump
RU734A83MERV 11PleatedPackaged Unit
RU171C20MERV 8HEPAHeat Pump
RU435Z80MERV 11FiberglassHeat Pump
RU466A73MERV 13HEPAPackaged Unit
RU220A23MERV 8HEPAHeat Pump
RU501A46MERV 13FiberglassFurnace
RU826Z46MERV 13FiberglassPackaged Unit
RU344C76MERV 13FiberglassFurnace
RU458X34MERV 11HEPAHeat Pump
RU394A68MERV 8PleatedAir Handler
RU457X34MERV 11PleatedHeat Pump
RU562C94MERV 8FiberglassFurnace
RU144B75MERV 13FiberglassPackaged Unit
RU843C38MERV 11FiberglassAir Handler
RU945A59MERV 13PleatedFurnace
RU545A22MERV 13FiberglassFurnace
RU262X58MERV 8PleatedPackaged Unit
RU539Z76MERV 8PleatedHeat Pump
RU713Z80MERV 13PleatedAir Handler
RU852Z47MERV 11FiberglassFurnace
RU793X61MERV 13PleatedPackaged Unit
RU204Z82MERV 8HEPAHeat Pump
RU353Z63MERV 8FiberglassPackaged Unit
RU215B18MERV 11PleatedPackaged Unit
RU112C43MERV 13PleatedFurnace
RU152X58MERV 8FiberglassFurnace
RU114C18MERV 13FiberglassFurnace
RU779X56MERV 8HEPAAir Handler
RU615C58MERV 13FiberglassHeat Pump
RU175X12MERV 13PleatedPackaged Unit
RU112B82MERV 8FiberglassAir Handler
RU101C48MERV 13FiberglassAir Handler
RU611Z49MERV 13HEPAHeat Pump
RU322A71MERV 13PleatedFurnace
RU200Z59MERV 13PleatedHeat Pump
RU478C65MERV 11PleatedHeat Pump
RU371A13MERV 11HEPAPackaged Unit
RU897B61MERV 11PleatedPackaged Unit
RU746X99MERV 11FiberglassFurnace
RU129X23MERV 8FiberglassFurnace
RU648A17MERV 8HEPAPackaged Unit
RU904B24MERV 8FiberglassFurnace
RU201B27MERV 13HEPAAir Handler
RU890X30MERV 11PleatedFurnace
RU609A79MERV 11FiberglassFurnace
RU868Z51MERV 11HEPAFurnace
RU579A88MERV 11FiberglassAir Handler
RU552C69MERV 13FiberglassAir Handler
RU870C65MERV 8PleatedHeat Pump
RU765Z91MERV 13FiberglassPackaged Unit
RU832B54MERV 13HEPAHeat Pump
RU467B13MERV 13PleatedFurnace
RU525Z15MERV 11HEPAHeat Pump
RU409Z99MERV 8HEPAHeat Pump
RU185B88MERV 11PleatedHeat Pump
RU908X94MERV 8FiberglassPackaged Unit
RU469C39MERV 13HEPAHeat Pump
RU594X28MERV 13PleatedHeat Pump
RU996A22MERV 8FiberglassFurnace
RU882Z26MERV 13PleatedAir Handler
RU287X67MERV 13PleatedPackaged Unit
RU837A28MERV 13FiberglassHeat Pump
RU667B32MERV 8PleatedPackaged Unit
RU364B46MERV 13HEPAAir Handler
RU558X26MERV 13HEPAHeat Pump
RU934X27MERV 8HEPAPackaged Unit
RU984C37MERV 13PleatedFurnace
RU292Z92MERV 13HEPAPackaged Unit
RU201A93MERV 8FiberglassFurnace
RU456Z96MERV 13PleatedFurnace
RU392C58MERV 11PleatedFurnace
RU839A92MERV 11HEPAAir Handler
RU380Z70MERV 8PleatedHeat Pump
RU576C58MERV 11HEPAAir Handler
RU415Z35MERV 11HEPAAir Handler
RU616B11MERV 11FiberglassAir Handler
RU737B62MERV 13FiberglassPackaged Unit
RU205C57MERV 13PleatedFurnace
RU226Z62MERV 11PleatedPackaged Unit
RU576C35MERV 8HEPAPackaged Unit
RU538X78MERV 8FiberglassFurnace
RU636Z35MERV 11HEPAHeat Pump
RU847Z31MERV 13PleatedPackaged Unit
RU265B50MERV 13PleatedAir Handler
RU686B35MERV 11FiberglassAir Handler
RU862B61MERV 13PleatedPackaged Unit
RU860Z68MERV 13HEPAFurnace
RU626Z64MERV 13HEPAHeat Pump
RU552B82MERV 8HEPAHeat Pump
RU291Z66MERV 11HEPAFurnace
RU680Z12MERV 11PleatedAir Handler
RU278X58MERV 11HEPAPackaged Unit
RU339A52MERV 8FiberglassAir Handler
RU732C20MERV 11PleatedAir Handler
RU869X95MERV 13FiberglassPackaged Unit
RU894X19MERV 13FiberglassFurnace
RU313Z14MERV 8HEPAAir Handler
RU511B53MERV 13HEPAAir Handler
RU484B61MERV 11HEPAPackaged Unit
RU238C50MERV 8HEPAPackaged Unit
RU380C71MERV 13PleatedPackaged Unit
RU782A28MERV 8FiberglassHeat Pump
RU961B75MERV 11FiberglassFurnace
RU917Z25MERV 13FiberglassAir Handler
RU389X77MERV 11HEPAAir Handler
RU131A78MERV 13HEPAFurnace
RU400Z43MERV 8FiberglassAir Handler
RU834C51MERV 13HEPAFurnace
RU760Z42MERV 8PleatedPackaged Unit
RU151C27MERV 11HEPAHeat Pump
RU700C12MERV 13FiberglassHeat Pump
RU299C43MERV 13PleatedAir Handler
RU250C41MERV 8HEPAPackaged Unit
RU142Z67MERV 13HEPAPackaged Unit
RU269B38MERV 8HEPAHeat Pump
RU172A94MERV 8PleatedPackaged Unit
RU748A59MERV 8FiberglassAir Handler
RU740B67MERV 8PleatedFurnace
RU919Z46MERV 13FiberglassAir Handler
RU126Z39MERV 11FiberglassHeat Pump
RU390X72MERV 13HEPAHeat Pump
RU949A74MERV 11HEPAPackaged Unit
RU701B74MERV 8HEPAPackaged Unit
RU637X12MERV 11FiberglassAir Handler
RU842X44MERV 11PleatedHeat Pump
RU332C32MERV 11FiberglassHeat Pump
RU666B90MERV 13HEPAFurnace
RU484B78MERV 11PleatedFurnace
RU155X38MERV 8HEPAAir Handler
RU645Z14MERV 11PleatedHeat Pump
RU560X89MERV 8FiberglassPackaged Unit
RU246C72MERV 11PleatedFurnace
RU432A67MERV 8FiberglassAir Handler
RU401X61MERV 8FiberglassAir Handler
RU644Z99MERV 8FiberglassHeat Pump
RU488Z93MERV 8FiberglassFurnace
RU815X25MERV 8FiberglassPackaged Unit
RU444B80MERV 8PleatedPackaged Unit
RU371Z91MERV 11PleatedHeat Pump
RU818X19MERV 8FiberglassFurnace
RU599C73MERV 8FiberglassFurnace
RU337X90MERV 11PleatedHeat Pump
RU813B45MERV 13PleatedPackaged Unit
RU136Z59MERV 8HEPAHeat Pump
RU220C63MERV 13FiberglassAir Handler
RU187A92MERV 13FiberglassHeat Pump
RU449C30MERV 8HEPAFurnace
RU434B84MERV 13PleatedPackaged Unit
RU582X78MERV 13HEPAAir Handler
RU768C64MERV 11FiberglassAir Handler
RU264A12MERV 13PleatedAir Handler
RU940B31MERV 8PleatedPackaged Unit
RU828Z50MERV 13PleatedHeat Pump
RU966A18MERV 13FiberglassAir Handler
RU285B28MERV 11FiberglassFurnace
RU469X25MERV 13HEPAFurnace
RU927A52MERV 13FiberglassFurnace
RU887C64MERV 11FiberglassPackaged Unit
RU155C79MERV 8HEPAFurnace
RU741Z39MERV 11PleatedAir Handler
RU911C43MERV 11PleatedHeat Pump
RU611C41MERV 13PleatedHeat Pump
RU756C80MERV 13PleatedFurnace
RU929B16MERV 13PleatedHeat Pump
RU471X14MERV 11PleatedPackaged Unit
RU579C13MERV 13FiberglassAir Handler
RU896C28MERV 11FiberglassAir Handler
RU705X75MERV 8HEPAPackaged Unit
RU672Z46MERV 11PleatedAir Handler
RU950B76MERV 8HEPAPackaged Unit
RU685Z96MERV 11HEPAAir Handler
RU496A21MERV 13HEPAHeat Pump
RU730X89MERV 13FiberglassHeat Pump
RU273Z10MERV 13FiberglassPackaged Unit
RU451X62MERV 11FiberglassHeat Pump
RU750B90MERV 11FiberglassFurnace
RU857A96MERV 13HEPAHeat Pump
RU412B55MERV 8HEPAHeat Pump
RU159B57MERV 8FiberglassPackaged Unit
RU659A42MERV 11HEPAHeat Pump
RU175A11MERV 11HEPAAir Handler
RU334Z18MERV 8PleatedFurnace
RU168B96MERV 8FiberglassAir Handler
RU413Z65MERV 13FiberglassAir Handler
RU827B19MERV 8FiberglassFurnace
RU579Z33MERV 11HEPAPackaged Unit
RU457A13MERV 13FiberglassHeat Pump
RU111Z63MERV 11HEPAAir Handler
RU531X93MERV 11FiberglassFurnace
RU262Z55MERV 13PleatedPackaged Unit
RU348Z29MERV 8FiberglassPackaged Unit
RU114Z11MERV 11HEPAAir Handler
RU183A22MERV 13HEPAPackaged Unit
RU329X86MERV 13PleatedHeat Pump
RU606Z68MERV 11PleatedHeat Pump
RU359X86MERV 8PleatedFurnace
RU919X40MERV 11PleatedPackaged Unit
RU172X55MERV 13PleatedAir Handler
RU883C90MERV 13PleatedPackaged Unit
RU192X12MERV 13FiberglassPackaged Unit
RU260Z54MERV 8PleatedPackaged Unit
RU676C10MERV 8HEPAFurnace
RU914X22MERV 8FiberglassHeat 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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