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  • Rectangular ducts

    Rectangular ventilation duct type A1

    • Rectangular ventilation ducts and fittings, conforming to the norm PN-EN 1505:2001.
    • Made of galvanized steel DX51D+Z 275 MA-C (DIN 10327).

    Rules of using the rims in the ventilation ducts and fittings with the standard quality:

    Size of the rim depending on the side length Additional information
    Side length [mm] ≤ 900 >901 cold-rolled galvanized steel -Z 275
    Size of the rim P20 P30 corner and profile of ducts sealed by mass
    Rules of stiffening the ventilation ducts with the standard quality:
    A [mm] B[mm] L[mm] Stiffenings
    <1000 <1000 <1000 0
    <1000 ≥1001 ≥1000 1
    <1000 1500-2000 1000-1500 2
    <1000 1500-2000 1500-2000 3
    ≥1000 ≥1000 1000-1500 1 cross bracing
    1000-2000 1000-2000 1000-1500 2 cross bracing

    Classification:

    Class of tightness
    Admissible leak (fmax) m3 · s1 · m-2 Admissible pressure (ps) Pa
    Podciśnienie we wszystkich klasach ciśnienia Nadciśnienie w danej klasie ciśnienia
    1 2 3
    A 0,027 x ptest0,65 x 10-3 200 400
    B 0,009 x ptest0,65 x 10-3 500 400 1000 2000
    C 0,003 x ptest0,65 x 10-3 750 400 1000 2000
    D * 0,001 x ptest0,65 x 10-3 750 400 1000 2000

    Minimum area of fitting to calculate is 1,0 m 2.

    Standard length of ducts-1500 mm.

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