Less than 300 CFMs

Work best with cooktops less than 30,000 BTU

300-599 CFMs

Work best with cooktops 30,000-59,900 BTU

600-899 CFMs

Work best with cooktops 60,000-89,900 BTU

900-1199 CFMs

Work best with cooktops 90,000-119,900 BTU

1200 CFMs or More

Work best with cooktops 120,000 BTU or more

Ducted (Vented)

Removes impure air through installed ductwork

Convertible

Ductless functionality or switch to install ducted

Ductless (Non-Vented)

Recirculates filtered air into space, easy install