Return air access grilles
Applications:
Return air access grilles, with or without filter, are the terminal elements of a manifold HVAC system, that provides both the evacuation or recirculation of air from room and easy access for checks and maintenance to equipment installed above false ceilings. They are successfully used also for smoke removal systems.
Description:
The foldable (central) part of return air access grilles is provided with one row of fixed blades, made of semi-round profiles, displayed horizontally or vertically, based on client΄s demand. Blades are fastened with a peripheral gasket made of silicon rubber (this material is inert to temperature variations and age-resistant), flush-mounted, preventing accidental release. This is also a method to prevent possible noises that may occur in time due to air flow and operating micro-vibrations. The additional frame (counter-frame) shall remain fastened to its installation spot, allowing only the actual grille to be folded, while remaining suspended by hinges and by the adjustable safety system. The lock system is click-clack type (closing／opening by successive pushes). On request, this closing system may be provided with magnetic support elements. Based on order specifications, grilles may be provided with fixed or detachable protective filter, with a frame sliding on rails specially provided on the grille. Rated sizes (specified in order) shall be the frame sizes.
