16 wide x 20 tall (duct opening size) 22.5 wide x 18.5 tall (overall size) Surface Mount - One way directional with louvers running the SHORT way - Unfinished Red Oak = $295
20 wide x 14 tall (duct opening size) 16.5 wide x 22.5 tall (overall size) Surface Mount - One way directional with louvers running the LONG way - Unfinished Red Oak = $265
