The glazed space can be aired through a half open ventilation window. Pull the rope/knob/cable and only open the ventilation window half way. Let the ventilation device/lock fall into a rail in the wheel guide. The ventilation window will now be steady even though it is not fully open.
CLEANING & MAINTENANCE
The cleaning requirements for the system are subject to its location and prevailing conditions. Alcohol-free domestic cleaner can be used for the purpose. Do not use strong solvents, acids or lye. Excessive rubbing should be avoided.
Under normal conditions, the system does not require regular maintenance. It is recommended to spray any moving parts with a silicone spray a few times a year.
Do not use oil as a lubricant. If your system is not functioning properly, please contact our customer service: (+34) 952 461 174 or firstname.lastname@example.org