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Common Geothermal Filters by Manufacturer listed below.

PLEASE NOTE - Some filters are not interchangeable by Manufacturer

Climatemaster - Carrier



Nominal Size

Exact Size

FFW Product ID

24 x 28 x 2 23-5/8 x 27-5/8 x 2 M11SP23K27K2
28 x 30 x 2 27-3/4 x 29-3/8 x 2 M11SP27M29F2E
28 x 29-1/2 x 2 28 x 29-1/2 x 2 M11SP2829H2
30 x 32 x 2 29-1/2 x 31-3/4 x 2 M11SP29H31M2E
30 x 36 x 2 29-1/2 x 35-3/4 x 2 M11SP29H35M2E




Waterfurnace


Nominal Size

Exact Size

FFW Product ID

24 x 28 x 2 23-5/8 x 27-5/8 x 2 M11SP23K27K2
28 x 30 x 2 28 x 30 x 2 *M11SP28302-EXACT
30 x 32 x 2 30 x 32 x 2 *M11SP30322-EXACT
30 x 36 x 2 29-1/2 x 35-3/4 x 2 M11SP29H35M2E
* The above filters are built to a 1/8" tolerance - thus measurements can be 1/8" +/- size listed.


Geofinity




Nominal Size

Exact Size

FFW Product ID

24 x 30 x 1 23-7/8 x 29-7/8 x 1 M1124301-6
28 x 32 x 1 27-7/8 x 31-7/8 x 1 M1128321-6
18 x 18 x 1
(2 per Change)
17-1/2 x 17-1/2 x 1 M1118181-6
18 x 24 x 1
(2 per Change)
17-1/2 x 23-1/2 x 1 M1118241-6
20 x 25 x 1
(2 per Change)
19-1/2 x 24-1/2 x 1 M1120251-6
32 x 34 x 2
31-3/8 x 33-3/4 x 2
82B202A00
32 x 38 x 2
31-1/2 x 37-1/2 x 282B203A00
30 x 32 x 230 x 32 x 282B204A00
27 x 30 x 227 x 29-1/2 x 282B205A00
23 x 48 x 222-1/2 x 47-3/4 x 282B206A00
23 x 43 x 222-1/2 x 42-7/8 x 282B207A00
21 x 39 x 221 x 38-3/4 x 282B208A00
21 x 33 x 221 x 32-3/4 x 282B209A00



Bosh - Florida Heat Pump




Nominal Size

Exact Size

FFW Product ID

24 x 24 x 2 23-3/8 x 23-3/8 x 2 M1124242
24 x 30 x 2 23-7/8 x 29-7/8 x 2 M11SP24302
20 x 30 x 2 19-5/8 x 29-5/8 x 2 M1120302
16 x 20 x 2 15-1/2 x 19-1/2 x 2 M1116202
15 x 20 x 1 14-1/2 x 19-1/2 x 1 M1115201
16 x 20 x 1
15-1/2 x 29-1/2 x 1
M1116301
20 x 20 x 1 19-1/2 x 19-1/2 x 1 M1120201
20 x 30 x 1
19-1/2 x 29-1/2 x 1
M1120301
24 x 24 x 1 23-3/4 x 23-3/4 x 1 M1124241
24 x 30 x 1 23-1/2 x 29-1/2 x 1 M1124301

Geocomfort


Nominal Size

Exact Size

FFW Product ID

24 x 30 x 1 23-1/2 x 29-1/2 x 1 M1124301-6
28 x 32 x 1 27-1/2 x 31-1/2 x 1 M1128321-6
28 x 36 x 1 27-1/2 x 35-1/2 x 1 M1128361-6
18 x 18 x 1 17-1/2 x 17-1/2 x 1 M1118181-6
15 x 20 x 1 17-1/2 x 23-1/2 x 1 M1118241-6
16 x 20 x 1
19-1/2 x 24-1/2 x 1
M1120251-6

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