International Comfort Products The 1172823 Blower Vent Used on models C9MPD050F12C1, C9MPD050F12C2 and C9MPD075F12C1 Used on models C9MPD075F12C2, C9MPD080J16C1 and C9MPD080J16C2 Used on models C9MPD100J14C1, C9MPD100J14C2 and C9MPD100J20C1