Accessories

When the fan is turned off, the non-return flap prevents outside air from entering the room and out of hot air. When the fan is running, the non-return flap opens to allow unwanted air to be removed efficiently.

Square base made of acid-resistant steel is designed to protect the space around the chimney from adverse weather conditions, further simplifies the installation of the chimney cowl.

GFK - gravity backdraft damper to prevent air back draft in the system. Such fan configuration that includes KFK mixing chamber and GFK backdraft damper ensures fan motor overheating protection based on BY-PASS actuation, in particular when the motor is not running due to no power supply. This design enables backdraft damper shutting and hot air distribution to other premises through ventilation ducts when the motor is not running.