The window blinds are an integral part of the HVAC system. Blinds should be kept in the fully lowered position to maintain a comfortable temperature level. They are manufactured with a Top Lock feature that allows them to be in either the fully lowered or fully raised position. This provides a more uniform appearance on the outside of the building and within your office.
A Tilt Limiter is installed which prevents the slats from being fully open. This is necessary to prevent heat build-up between the blind and the glass. Forcing the tilter rod to turn beyond this limiter will cause damage to the blind.