1 20/ALE,ALU/3500/0606/EN ALE/ALU - Universal Grille Halton ALE/ALU Universal Grille • Horizontal air supply, also suitable for exhaust • Fixed vanes, stable throw pattern with vertical 15° deflection: ALE, no deflection: ALU • Aluminium design with elegant appearance • Detachable grille allows cleaning of the grille and ductwork • Continuous grilles available with modular design Accessories • Airflow adjustment damper • Plenum options with measurement and adjustment functions • Installation frame MATERIAL AND FINISHING PART MATERIAL FINISHING NOTE Frame Aluminium Anodised, Polyester-painted, White RAL 9010 50% gloss, Mill finished Special colours available Epoxy-painting (100 %) available Vanes Aluminium Anodised, Polyester-painted, White RAL 9010 50% gloss, Mill finished Special colours available Epoxy-painting (100 %) available Installation frame Galvanised steel Plenum box / spigot Galvanised steel ACCESSORIES ACCESSORY CODE DESCRIPTION Balancing plenum PRI For balancing & equalising the airflow and attenuating the duct noise Plenum BDR Plenum for duct connection (with or without attenuation material) Airflow measurement and adjustment unit MSM For supply installation Sound attenuation IN Mineral wool for the BDR plenum box. Polyester fiber for the PRI plenum box. Flow adjustment damper OD Aluminium opposite blade damper for airflow adjustment Installation frame IF For installation without plenum Concealed screw fastening CC For installation with BDR plenum or IF frame
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Universal Grille - Halton · 3 20/ALE,ALU/3500/0606/EN ALE/ALU - Universal Grille Installation The grille is connected to the circular duct using either a PRI balancing plenum or
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ALE/ALU - Universal Grille
Halton ALE/ALU Universal Grille
• Horizontal air supply, also suitable for exhaust
• Fixed vanes, stable throw pattern with vertical
15° deflection: ALE, no deflection: ALU
• Aluminium design with elegant appearance
• Detachable grille allows cleaning of the grille
and ductwork
• Continuous grilles available with modular design
Pressure drop, throw pattern and sound dataALE or ALU, wall installation at a distance of 200 mm from the ceiling (with coanda effect)
Selection example : Requirements : qv = 300 l/s Selection : ALE or ALU-1000x150 LpA < 35 dB(A) LpA = 31 dB(A) L0,2 < 28 m L0,2 = 27 m DPtot = 11 Pa
Note :
When there is no coanda effect (installation greater than 200 mm from ceiling) the throw pattern must be multiplied by 0.7.For exhaust use, adjust supply data by adding + 5 dB(A) and DPs= DPs x 1.2.
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Sound power level with od damper
Use of an OD opposite blade damper, will result in
increased pressure loss. The resulting increase in
sound level is computed from the selection chart value
and the formula below:
LpA = DLp + LpA
Kp= Adjusted pressure dropPressure drop in selection chart
Example :
ALE-1000x150 + OD/ALE
qv = 300 l/s
LpA = 31 dB(A) without damper OD/ALE
DPs= 50 Pa (desired pressure drop)
Kp = 50/11 = 4.5
LpA = 31 + 14 = 45 dB(A)
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ALE/ALU - Universal Grille
SOUND LEVEL DATA, SUPPLY
ALE-ALU qv DPst DPtot F (Hz) LpA NR NC(l/s) (m3/h) (Pa) (Pa) 125 250 500 1000 2000 4000 8000 [dB(A)]