AirOnova

A passive supply air system such as AirOnova is the ideal solution here. They can be used as individual elements to supply air to living rooms and bedrooms or integrated as a component in various LIMODOR exhaust systems. Sound insulation, filters to protect against dust, pollen and allergens, as well as wind pressure protection provide high comfort.

It is important to prevent danger from carbon monoxide, explosive, toxic or flammable substances. It is also essential to ensure sufficient fresh air supply. Therefore, a combination of an exhaust fan and a supply air system is recommended.

A passive supply air system such as AirOnova is the ideal solution here. Built into a simple wall breakthrough, it provides over filters to protect against dust, allergens and pesky insects. In addition, noise from outside is minimized by a silencer.

This depends on the ventilation system and the tightness of the room and doors. Supply air elements are recommended for well-insulated new buildings. In any case, sufficient supply air must be ensured if there is a fireplace or stove with an open fire in the room. This prevents toxic carbon monoxide, which is produced by a lack of oxygen. Passive supply air elements are generally recommended for modern rooms, which are becoming increasingly tight and better insulated for energy-saving reasons. For example, they also provide constant fresh air without noise, pollutants or insects when opening windows.

To ensure trouble-free operation of the supply air unit, the inlet grilles, filters, air ducts and the optionally installed wind or insect screen must be checked for dirt from time to time, cleaned if necessary and replaced if required.

It is recommended to perform a check at least twice a year. If there is a high dust or pollen load or in regions with a high incidence of insects, the inspection intervals must be shortened accordingly.

To ensure a proper and undisturbed air flow, the filter tray must not be covered by furniture, blinds, curtains and similar furnishing elements.
Since a supply air element does not have a heater and fresh air is therefore drawn in at the prevailing outside temperature, it is advisable to position the filter trough close to, ideally above, a radiator. This preheats the airflow during the cold season.

In general, a supply air element can either be installed like a ventilator in a straight wall opening or integrated inconspicuously in the window reveal as a special design with a 90° bend.

AirOnova supply air systems run either as a straight pipe through the house wall or, when installed in the window reveal, as a pipe with a supplementary 90° deflection and a so-called wide duct that is walled into the window reveal.

Starting from the outside, fresh air enters through a ventilation grille. On its way through the tube, it passes an insect screen and an optional wind pressure safety device. Noise protection is made possible by a silencer in the pipe. The fresh air exits through a so-called filter trough on the inner wall. The filter tray contains a filter insert that binds allergens and dust. The outgoing air volume can be infinitely adjusted manually. Drafts are prevented by this system.

For efficient air exchange, some factors should be considered:

• The position of the fan, e.g. in the bathroom or toilet, should be chosen as close as possible to the point of origin of the humid or odorous air. This increases efficiency and speed.
• Do not mount fans in blind spots or areas where the intake airflow will encounter obstructions.
• Air flowing in, e.g. through doors or supply air elements, should also be able to sweep in the direction of the extraction unit as undisturbed as possible in order to be able to absorb a maximum of moisture, especially in the bathroom.
• In times of increasingly tight rooms and doors, it is essential to ensure sufficient supply air for fireplaces, if necessary by means of separate supply air elements, in order not to produce toxic carbon monoxide.
• Exhausted air should be able to get outside in the shortest and straightest way possible. Any kink or constriction lowers the efficiency.
• Of course, the fan arrangement must not cause any unpleasant drafts.

Supply air systems of the AirOnova type, which Limodor offers in its product range, are purely passive elements. In modern form, they replace previously often existing door crack, leaky windows or other air entrances into the house. And, of course, then there is no need to open windows for ventilation. Supply air elements provide protection from annoying insects, dust and allergens through a filter insert. Particularly important is the noise protection provided by integrated silencers. In addition, the air supply can be adjusted continuously. Sudden gusts of wind are absorbed by an optional wind pressure safety device.

If one defines the term supply air system somewhat more broadly, then of course a motorized single-pipe fan, such as the type Limodor W, which is also referred to as a fan box, or a decentralized residential ventilation system such as the compact AirOdor can also be used to supply fresh air. For example, in apartment blocks with basement ventilation, a fan box is often integrated to draw in and distribute fresh air.