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KOOLAIR S.A
21-DVC/21-DVR

21-DVC/21-DVR

Product catalog summary

Product Overview: The document describes the KOOLAIR double deflection grilles, models 21-DVC and 21-DVR, designed for circular and rectangular ducts respectively. These grilles are used for supply and return air and can include volume control dampers. They are available in steel sheet or any RAL color upon request.

Mounting: The grilles are mounted using screws, with pre-drilled holes provided for easy installation.

General Dimensions: The dimensions for the grilles are specified as L (Opening Length) and H (Opening Height). Specific measurements for both models are provided, with additional details on duct diameter compatibility.

Performance Specifications: Key performance metrics include air flow (Q in m3/h), sound power level (LwA in dB(A)), total pressure loss (∆Pt in Pa), throw distance (X in meters), and effective velocity (Vk in m/s). These metrics are detailed for various grille sizes.

Selection Table: The selection table provides a summary of dimensions for circular ducts, indicating minimum and maximum diameters for different heights (H in mm). Additional sizes are available upon request from the sales department.

Catalog excerpts

Selection table Double deflection grille for ducts Product description Double deflection grille for circular ducts, KOOLAIR, model 21-DVC, of dimensions LxH, for supply and return air. It can incorporate volume control dampers (-RFS-05 / 06). Finished in steel sheet or any RAL colour upon request. Other models 21-DVR. Double deflection grille for rectangular ducts. Mounting With screws. The grille is provided with holes for screwing. General dimensions The Selection Table shows a summary of dimensions. Other sizes available. Consult the Sales Department. LEGEND Q (m3/h): Air flow. Lwa [dB(A)]: Sound power level. APt (Pa): Total pressure loss. X (m): Throw for a maximum velocity of 0.25 m/s at the occupied zone AT = -10 °C (cold), installed at 2.7 m of height, with ceiling effect. Vk (m/s): Effective velocity.

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