Rheem furnace filter sizes

78 Rheem furnace models, 14 model families.

Pick the start of your model number, or search below.

R801P UH R801S UH R801T UH R801TA UH (Classic Plus)R801V UH R801VA ULN (UF/HZ)R951V ULN R962V R96P RGRA/RGRB (Classic 90 Plus upflow)RGRC RGRK (90 Plus Dual Comfort two-stage upflow)RGRL RGTC (downflow/horizontal 95%)

How to read a Rheem model number

Rheem and Ruud furnaces share model numbers. For these families the filter follows the cabinet width, not the heating input. Page numbers below are the page of the PDF file.

Endeavor line 2022-2026 (R801T, R801V, R802V, R921T/V, R951T/V, R962V, R97MV, R98MV; Rheem and Ruud use the same model numbers)

Example: R801T0503A14UHSNAS

R = brand letter (R for both Rheem and Ruud on this line; Ruud = 'Achiever', Rheem = 'Classic')
80 / 92 / 95 / 96 / 97 / 98 = AFUE class
next char = stages of heating: 1 single-stage, 2 two-stage, M modulating
next char = blower motor: T constant torque, V variable-speed ECM
3 digits = heating input in kBTU/h (050 = 50,000; 075 = 75,000; 100 = 100,000; 115 = 115,000)
1 digit = max AC blower tons (3, 4 or 5)
letter = major design series (A)
2 digits = cabinet width: 14 = 14in, 17 = 17.5in, 21 = 21in, 24 = 24.5in ; this sets the filter size
position code: UH upflow/horizontal, DZ downflow (zero-clearance), M4 multi-position 4-way, DH downflow/horizontal, UP upflow
NOx: S standard, N low NOx, U ultra-low NOx
controls: N non-communicating, C or G communicating (EcoNet)
minor series letter (A)
option code: S standard grade, P premium grade

How it connects to the filter: External bottom rack RXGF-CB: 14in cabinet 12 1/4 x 25, 17.5in 15 3/4 x 25, 21in 19 1/4 x 25, 24.5in 22 3/4 x 25. Side rack RXGF-CD: 15 3/4 x 25 for every size. Downflow 80% (DZ): RXGF-CC (2) 14 x 20. 90%+ multi-position: RXGF-CC 14 x 20 or 12 x 20 depending on family. 97/98% modulating: 16x24 / 20x24 / 24x24 by cabinet. Exceptions exist in individual tables (see the model data notes).

Where this comes from: Rheem R801T UH spec sheet G11-662 Rev.1, p.12; R921T G11-672 Rev.1 p.79; R97MV G11-677 Rev.1 p.121

Rheem/Ruud 80% 2012-2021 (R801S, R801P, R801T, R801V, R802P, R802V; Ruud also used U802V)

Example: R801SA075417MSA

R = Rheem (Ruud versions of R801S/R801P/R801T use the same R prefix; U802V is Ruud's twin of R802V)
80 = 80% AFUE; 1 = single stage, 2 = two-stage
S = PSC motor, P = PSC (Classic), T = constant torque, V = variable speed
A = design series
3 digits = input kBTU/h (050, 075, 100, 125, 150)
1 digit = AC tons (3, 4, 5)
2 digits = cabinet width (14 = 14in, 17 = 17.5in, 21 = 21in, 24 = 24.5in)
M = multi/upflow-horizontal configuration; Z = downflow
S = standard, X = low NOx (shown as * in spec sheets)
A = marketing revision

Where this comes from: Rheem R801S (UF/HZ) spec sheet G11-542 Rev.3, p.5

Rheem/Ruud 90%+ 2009-2021 (R92T, R92P, R95T, R96P, R96V; Ruud U96V)

Example: R95TA0401317MSA

R = Rheem (U = Ruud on U96V/U97V)
92 / 95 / 96 = AFUE class
T constant torque, P PSC, V variable speed
A = design series
3 digits = input code (NOTE: 040 = 42,000; 060 = 56,000; 070 = 70,000; 085 = 84,000; 100 = 98,000; 115 = 112,000 BTU/h)
1 digit = stages (1 single, 2 two-stage)
1 digit = airflow (3 = up to 3 tons, 5 = up to 5 tons)
2 digits = cabinet width (17 = 17.5in, 21 = 21in, 24 = 24.5in)
M = multi-position
S = standard
A = revision

Where this comes from: Rheem R95T spec sheet G11-538, p.5

Rheem/Ruud 1990s-2000s RG** families (RGRA, RGRB, RGRC, RGRK, RGRL, RGRM, RGTC, RGTM, RGPN, RGPQ; Ruud UGLN, UGTJ)

Example: RGRA-04EMAES

RG = Rheem/Ruud gas furnace (Ruud used RG** on some and UG** on others, e.g. UGLN, UGTJ)
3rd letter = configuration: R upflow (90 Plus), T downflow/horizontal, P upflow/horizontal 80%, L downflow 80% (UGLN)
4th letter = series (A, B, C, K, L, M, N, Q, J)
2 digits after dash = input class: 04 = 45k, 05 = 50k, 06 = 60k, 07 = 75k, 09 = 90k, 10 = 100-105k, 12 = 120-125k, 15 = 150k (confirm against the doc's input row)
E = electric ignition standard / N = NOx model (shown as * in some sheets)
next letter = blower size (M 11x7, R 11x10, Z 12x11, Y/B etc.)
next letter = cabinet (A = standard)
next letter = airflow range (E 1100-1300 CFM, G 1500-1700 CFM, J 1900-2100 CFM)
last letter = S U.S./Canadian (R on some 80% models)

Filter note: These older furnaces SHIPPED WITH a molded permanent (washable) filter; the spec sheet row 'STANDARD, HIGH VELOCITY PERMANENT FILTER' gives 15 3/4 x 25 x 1, 19 1/4 x 25 x 1 or 22 3/4 x 25 x 1 by cabinet. Downflow models list '(2) 12 x 20' or '(2) 14 x 20'.

Where this comes from: Rheem RGRA/RGRB G11-450 Rev.15 p.3 Model Identification; RGPN G11-518 p.4; UGLN G22-487 Rev.1 p.3. Decoding of blower/airflow letters is not confirmed: read from a single legend each.