Discover the range

Air inlet range
    In a CMEV system, air intakes serve to bring outdoor air into the building.
  • Air intakes are placed in living rooms (sitting room, bedroom, study) on window frames above the glass, on roller shutter boxes or wall penetrations. 
  • An air inlet is characterised by its module, which corresponds to the airflow traversing it at a baseline negative pressure of 20 Pa. There are 3 types of air inlets:
  • self-balanced air inlet: EA30 = 30 m³/h under 20 Pa,

    humidity-controlled air inlet: EHL6-44 = from 6 to 44 m³/h under 20 Pa, equivalent cross-section = 4 to 31 cm²,

    fixed air inlet: EFL30 = 30 m³/h under 20 Pa.

  • Acoustic regulations specify requirements for results: sound-proofing of a room in relation to outside noise (DnT, A).
  • For Residential use, the acoustic requirements are specified by the administrative order of 30.06.1999,

    In Non-residential, no requirements are applicable.

  • We deduce the requirements for the air inlet itself independently of its environment:
  • Dn,e,w (Ctr): aptitude of an air inlet to combat the propagation of road noise from the outside,

    Dn,e,w (C): aptitude of an air inlet to combat the propagation of airborne noise from the outside (if near to an airport).

  • For façades classified DnT,A,tr<30 dB, the index Dn,e,w(+Ctr) of air inlets could validate the example acoustic solutions (ESA) of the CSTB, which classifies air inlets as follows:
  • ESA 4: the standard EHL air inlet exhibits a Dnew(+Ctr) ≥ 36 dB for rooms where S/n >10

    ESA 5: the acoustic EHL air inlet or EHL with acoustic rain hood exhibits a Dnew(+Ctr) > 39 dB for rooms where S/n≤ 10

    (S/n: Surface area of room equipped / number of air inlets in the room)
  • For façade classifications DnT,A,tr < 35, 40, 42 or 45 dB, always take into account the acoustic insulation of the building structure, the joinery, the roller shutter box and the air inlet, to determine the acoustic insulation required on the air inlet. At lease one air inlet will be required with acoustic insulation Dn,e,w(+Ctr) ≥ DnT,A,tr + 6 dB (respectively 41, 46, 48 or 51 dB).
    The slots needed to install the air inlets are fairly standard.
    The slots must be made at the joinery production plant and not on the installation site.
  • On wooden joinery or old PVC and aluminium frames encountered on refurbishment projects, you often see a 250 x 15 mm slot.
  • On current PVC and aluminium frames, to meet the new mechanical requirements for profiles, the mortise comprises 2 slots, often 172 x 12 mm separated by 10 mm.