Guaranteed always fresh outdoor air

Revolutionary glass grille ensures optimal living comfort

A remodel that involves replacing not the windows but just the glass? Or a thorough renovation or new construction project with new windows? In either case, you can guarantee your client optimal living comfort thanks to a direct and natural supply of fresh outside air. A nice bonus: thanks to both the Renson Variavent glass ventilation grille and the Invisivent Air NL top grille, you score aesthetically a lot better in combination with wooden, plastic or aluminum window frames. Both ventilation grilles are also very easy to install.

New self-regulating Variavent glass diffuser

To call the Variavent "revolutionary" is not even an exaggeration. In fact, it is the first glass grille on the market equipped with the iFlux technology, which also characterizes Renson's Invisivent top grille. The Coanda effect and adjustable flow rate that that technology stands for first directs incoming air upward to mix with the warmer indoor air present. This increases the feeling of comfort in the room and avoids drafts. In addition to the updated design - you no longer see vents inside the home - there will be optional acoustic attenuation in the future, which can be taken off or put back on at any time.

Glass grilles like the Variavent are universally applicable. Regardless of construction or type of frame (aluminum, wood or plastic), installation is always the same. Thanks to the glass aperture of 80mm, smooth, airtight mounting on the glass and in the frame can be guaranteed. There is enough space to fix the glass frames of the frame and/or to install glass rubbers. The Variavent was designed for installation on glass, provided there is application with an optional calf profile, the Variavent is also suitable for calf installation. 

The "varia" in Variavent indicates the variation in flow rate. With its unique internal mechanism, Variavent can be set to four different flow rates while visually maintaining the same appearance. Moreover, the design of the Variavent matches that of the Invisivent top grille. So you can easily combine both solutions, resulting in a harmonious overall appearance. 

Invisivent Air NL for wind- and watertight window frame/toproster combo

With the Invisivent NL, Renson has already specifically adapted its top grille for natural window ventilation to the Dutch frame mounting. For the Dutch market, it was fitted with a stop profile both on the sides and at the top so that it could be installed - as one unit with the window - wind and watertight. This ensures a perfect airtight finish because the rubber seal of the frame extends into both the headboard and the top flange of the window vent. This took into account both the variation in thickness and width of the stop flange on Dutch window frames and the rubber uptake. Invisivent NL is compatible with the most common window profiles and offers an aesthetically pleasing solution that far surpasses the appearance of sill boxes and glass grilles. The ventilation grid can be screwed directly into the wooden frame.

Recently, Renson shifted another gear with an update to the Invisivent NL: the Invisivent Air NL. Except for the HF version, each type is equipped with acoustic mousse as standard. For even smoother installation, the rubber seal on the Invisivent Air NL is now additionally integrated into the grille itself. And thanks to the monobloc principle, it can now be mounted in one piece: easy to screw on with a stable result. Thanks to its compact design, this window grille fits aesthetically on top of (and along the entire length of) any aluminum, plastic and even wooden frame. For both new construction and renovation, this gives you the perfect balance between natural air supply and slim design. 

The Invisivent Air NL is available in one non-acoustic (HF) and three acoustic versions (Light, Basic and High). Both the 'Basic' and 'High' versions of the Invisivent Air NL are available in a variant specifically intended for highly wind-loaded applications in high-rise and apartment buildings.