Continental Fan EXT200B External Duct Fan Mount 8" 420 CFM

External mount duct fan this external mount fan is the perfect solution when space restrictions prevent the use of in-line duct fans. it provide a simple through-the -wall solution, and can be sidewall mounted on the exterior of the home to allow for easy access to the fan. features quiet, long lasting and energy efficient rotor motors. 420 cfm. optional variable speed control available.