Micro-perforations in the material covering the output openings allow air to be blown slowly and steadily into the room. This curtain of air provides what is known as a piston effect, air containing harmful substances flow towards the extraction inlet.

The filters is made up of extremely fine synthetic fibres together to form wedge-shaped filter pockets, with end frames made of galvanised steel or plastic. The individual pockets are securely fastened to the frame and sealed with a corrosion-proof plastic gasket.

Components such as fans produce unwanted noise. To keep the noise level at an acceptable level, noise insulators are built into the ventilation system as required. Sufficient insulation also keeps aerodynamic drag at a minimum. Using aerodynamically profiled splitter frames reduces pressure loss and therefore operational costs. The surface is covered with material made of biodegradable mineral wool that will not rot. The noise insulators are coated with moisture-resistand glass silk that is resistant to wear and tear an covered with galvanized steel

Cold outside air can cause drafts must be heated before it is introduced into the gun range. Two lamellar heat exchangers are used to heat cold air. Air is heated using heat from hot water or glycol via an intricate system of pipes fitted with a number of fins.

The demands for energy are ever increasing. Our high-performance fans have been especially developed for their use in modern ventilation and air-conditioning systems and are perfect for moving air and aggressive (lightly corrosive or acidic) gases and fumes. We are constantly developing and upgrading the rotor technology resulting in low power consumption, low costs and low noise.

There are several water heating systems available. Gas, oil, pellets or wood chip heating units or heat pumps can also be used in addition to and independently from the exisiting heat source.