Sound-reduced vent for wall mounting. The vent is designed to provide a continuous airflow into the building/house. TL98F dB contain internal part with adapter D98x30 mm and cover plate #180 mm, sound-reduced wall pipe (D102/143, L:400 mm) and external grille #150 with adapter D98x30 and cover plate #180 mm. The internal part has a condensation protected design, standard filter (dust/insect) and a variable precision damper for infinitely adjustment of the airflow. The regulator is hidden underneath the front cover. TL98F dB is a wall vent with a very comfortable distribution pattern, mainly designed for floor-heating, the vent distributes the air both upwards and sideways. The incoming air is efficiently mixed with the convection flow. Cold incoming air reaches a comfortable temperature even only a decimetre from the vent. In order to ensure correct airflow and to retain good air quality it is important to keep the filter clean. We recommend to wash/replace the filter 1-2/year. The Standard filter is washable (use a gentle soap/detergent). The Pollen filter and Environmental filter should be replaced with a new filter.