Trane L8V1 furnace filter sizes
L8V1 furnaces take 14 x 25 x 1 or 16 x 25 x 1 or 20 x 25 x 1 filters, depending on cabinet width and return.
Pick your full model number below for the exact size.
A 14 x 25 x 1 filter (upflow (return opening; external)) or a 14 x 25 x 1 filter (single/any (catalog) return)
A 16 x 25 x 1 filter (upflow (return opening; external)) or a 16 x 25 x 1 filter (single/any (catalog) return)
A 20 x 25 x 1 filter (upflow (return opening; external)) or a 20 x 25 x 1 filter (single/any (catalog) return)