Front
Crank joint mounted directly on front side of housing

Thru wall
Crank joint mounted inside wall of home / building

Back
Crank joint mounted directly on back on back side of housing

No Exit
no universal – no crank joint installed or supplied
Crank joint mounted directly on front side of housing

Crank joint mounted inside wall of home / building

Crank joint mounted directly on back on back side of housing

no universal – no crank joint installed or supplied