Houghton BELAIRE HB3400 Owner's Manual page 12

Adjust the louver
⚫
Adjust direction and angle of louver by moving blade
around its axis. The 2 blades move together. Louvers
on opposite sides are symmetrical.
Louver
eeer=e
er
⚫
Ajust direction and angle of louver by moving the
raised piece in the center of louver. Louvers on
opposite sides are symmetrical.
louver
e
9
Louver open
Louver close
Raised piece