Ventilation Systems, Air Grilles and Vents

They circulate air in enclosed spaces and sites where natural ventilation is lacking, or help expel fumes and dust. Battery models are useful where there is no power supply, while mains-powered models suit longer jobs. Choose the airflow according to the room volume, and check the power and noise level on the data sheet.

No. The purifier traps dust and particulates with a filter, but it does not replace ventilation where fumes, gases or vapours are produced. Consider the surface of the room, the type of pollutant and how often the filters need replacing. The range includes Kärcher purifiers and replacement filters: use only those specified by the manufacturer.

A hole sized to the grille is made, then the grille is fixed with springs or screws, depending on the model. Grilles must let air pass without creating unpleasant draughts and without obstructing the free area. Anti-intrusion aluminium grilles or spring-loaded flaps are designed for masonry and walls. Check dimensions and fixing on the data sheet.

Copper grilles, such as the GR and GRA series, have a more decorative look and resist corrosion well. Metal or aluminium grilles are cheaper and suit external walls or technical passages. The choice depends on the environment, the aesthetics and the type of wall. For damp rooms or places near the sea, consider more resistant materials.

Ventilation of workplaces is governed by D.Lgs. 81/2008 (Italian Legislative Decree 81/2008 on workplace safety), which requires environments with healthy and adequate air. Municipal building regulations and requirements on air changes complete the picture. For rooms with combustion appliances, specific rules on flue discharge apply. For ventilation designs, have the calculation checked by a qualified technician.

The silencer is inserted into the duct to reduce the noise that travels along the pipe, without blocking the airflow. It must be fitted in the direction marked on its body, usually by an arrow. On long pipes or pipes with many bends, choose a model with adequate capacity, otherwise the ventilation loses effectiveness.

Rectangular PVC duct is rigid and tidy, suitable for ducting that must stay in line. Flexible aluminium duct adapts to curved routes and is quicker to install, but creates more resistance to airflow. More bends and more length reduce the airflow, so choose the diameter with care.