AHF
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AHF - 1

Halton AHF Exhaust Grille • Large free area, high airflow rates with minimal Product Models & Accessories pressure drop • Model with openable vane section • Integrated filter of class EU3 • Airflow adjustment damper • Reduced visibility through grille due to shaped • Installation frame horizontal vanes • Balancing plenum with measurement and • Sizes adapted to suit modular 600x600 suspended adjustment functions • Plenum insulation • Spare filter • Detachable grille allows cleaning of the grille and ductwork • Spring clip fastening MATERIAL AND FINISHING Anodised, Polyester-painted, White RAL 9010 50% gloss, Mill finished Special colours available Epoxy-painting (100 %) available Fixed vanes Anodised, Polyester-painted, White RAL 9010 50% gloss, Mill finished Special colours available Epoxy-painting (100 %) available EU3 class (Eurovent 4/5 method) Filter frame Galvanised steel Installation frame Galvanised steel Galvanised steel

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AHF - 2

Air is exhausted from the space with a low pressure drop through the vanes of the grille and filter. Wall or ceiling installation. Square grilles have symmetrically inverted vanes. The free area of the AHF grille is 75 %. Special Dimensions In addition to these standard sizes, other dimensions can be specially ordered. ACCESSORIES ACCESSORY Plenum for duct connection (with or without attenuation material) Airflow measurement and adjustment unit Sound attenuation Mineral wool for the BDR plenum box. Installation frame For installation without plenum Spare filter

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AHF - 3

Pressure drop and sound data, exhaust The grille is connected either directly to the duct using the installation frame or a BDR plenum. Clips fastening (standard) The grilles are supplied with spring fastening as Spring fastening is used with BDR plenums and IF installation frames. LpA values presented with room attenuation 4 dB (red 10m2 - sab). When using room attenuation 8 dB (red 25m2 - sab): LpA - 4dB. NR/NC noise criteria

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AHF - 4

Adjustment In order to enable adjustment and measurement of the airflow rate it is recommended that you connect the diffuser to the BDR balancing plenum equipped with the MEM module. The airflow rate can only be adjusted and measured when the grille is connected to the BDR plenum. Define the exhaust airflow rate by measuring the pressure difference between the measurement tap on D The corresponding airflow rate is calculated using the formula below. the BDR balancing plenum and the room air. Adjust the airflow rate by turning the control spindle of the MEM. K-factor for installations with...

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AHF - 5

Product Code The exhaust grille shall have a large free area. Suggested Specifications Pressure loss shall remain minimal, even with high exhaust rates. Non-clogging lightweight construction with fixed curved vanes shall prevent vision through the grille. The joints of the outer frame shall be practically The grille shall be anodised (or polyester-painted with a white (RAL 9010) standard colour). can be selected for modular 600x600 mm suspended The grille shall comprise a filter of EU3 class (Eurovent method 4/5) The grille can be connected to the duct using an installation frame or a...

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