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Application
Special characteristics
Variants
Attachments
Volume flow rate balancing on site
Parts and characteristics
Accessories
Nominal sizes
Width [mm]
200 - 2000
Height [mm]
50 - 500
For version R, RA
Width [mm]
200 - 1200
Height [mm]
50, 100, 150, 200, 250, 300
Further dimensions on request.
Construction features
Suitable air duct diameters
Note: The possible round air duct diameters are reduced depending on the grille height.
Material
Standards and guidelines
Surfaces
Maintenance
Diffusion grilles are air terminal devices for the supply air and extract air of ventilation and air conditioning systems. They direct the supply air into the room. Diffusion grilles with adjustable blades allow for adapting the discharge direction to the localconditions. The result is a mixed flow ventilation in comfort zones and industrial zones, with good overall room ventilation. Due to induction, the air velocity of the supply air flow decreases with increasing distance from the diffusion grille. The distance at which the airflow velocity reaches a certain defined value, e.g. 0.35 m/s, is called throw distance. The supply air flow from wall grilles that are arranged close to the ceiling achieves a greater throw distance than a comparable free jet (without ceiling influence), due to the ceiling effect. Single grilles, groups of grilles and linear run sections all achieve different throw distances. In cooling mode, it is necessary to consider the jet deflection towards the occupied zone, which increases as the supply air to room air temperature difference increases and the discharge velocity decreases. In heating mode, the supply air jetis deflected towards the ceiling. This has no negative effect on the airflow velocity in the occupied zone, but it may affect the overall ventilation of the room.
Blade arrangement | straight | 44° | 84° | 110° | 140° | opposing |
Air pattern angle β | 20° | 60° | 80° | 90° | 180° | 20° |
Distance Dh horizontal air discharge | 0.10 x RT | 0.29 x RT44 | 0.42 x RT84 | 0.5 x RT110 | – | 0.10 x RTg |
Distance Dv vertical air discharge | 0.25 x RT | 0.76 x RT44 | 1.07 x RT84 | 1.25 x RT110 | 3.26 x RT140 | 0.25 x RTg |
Room depth | RT Diagr. 1 and 2 | RT44 = 0.77 x RT | RT84 = 0.56 x RT | RT110 = 0.42 x RT | RT140 = 0.35 x RT | RTg = 1.3 x RT |
Factors for the eff. discharge velocity veff | veff = 1.0 | veff 44° = 1.18 | veff 84° = 1.35 | veff 110° = 1.52 | veff140° = 1.97 | veff opp = 1.97 |
Calculation example
Given data
Room length RL = 7.0 m, room height RH = 5.5 m, installation height EH = 4.0 m,
Air volume flow V = 1080 m³/h, or 300 l/s, undisturbed air pattern, blade position 84° diverging
Required
Grille dimensions B × H, room depth RT and RT84, discharge velocity veff, stat. pressure difference ∆ps,
Sound power level LwA, LwNC, LwNR
Solution
From RT84 = 0.56 × RT follows RT = RT84/0.56 = 7/0.56 ~13 m. Using the value in illustration 1, on the previous page, results in: 1 DG-VH,
600 × 200 mm, veff = 3.3 m/s. From EPF (Easy Product Finder) follows: ∆ps = 4 Pa, but because of its divergence 84°, it must be corrected. Thus ∆ps84 = 3.3 × 1.50 = 4.95 m/s ⇒ 8 Pa, sound power level LwA = 34 + 3 = 37 dB(A), LwNC = 37 - 4 = 33,
LwNR = 37 - 2 = 35 For more detailed LwA and Δps data, see EPF (Easy Product Finder)
Nominal sizes | 200 × 50 - 900 × 300 mm |
Minimum volume flow rate | 11 – 1,111 l/s or 40 – 4,000 m³/h |
Maximum volume flow rate, with LWA max. 40 dB(A) without attachments | 53 - 3,056 l/s or 189 - 11,000 m³/h |
Supply air temperature | -12 to +4 K |
H/B | 200 | 250 | 300 | 400 | 500 | 600 | 750 | 900 |
50 | 0.008 | 0.01 | 0.012 | 0.015 | 0.019 | 0.023 | 0.029 | 0.035 |
100 | 0.015 | 0.019 | 0.023 | 0.031 | 0.039 | 0.046 | 0.058 | 0.069 |
150 | – | – | 0.035 | 0.046 | 0.058 | 0.069 | 0.087 | 0.104 |
200 | – | – | – | 0.062 | 0.077 | 0.092 | 0.116 | 0.139 |
250 | – | – | – | – | – | 0.115 | 0.144 | 0.173 |
300 | – | – | – | – | – | 0.139 | 0.173 | 0.208 |
Geometric free area supply air (blade arrangement VH) Ageo [m2]
H/B | 200 | 250 | 300 | 400 | 500 | 600 | 750 | 900 |
50 | 0.008 | 0.01 | 0.012 | 0.016 | 0.02 | 0.024 | 0.03 | 0.036 |
100 | 0.016 | 0.02 | 0.024 | 0.032 | 0.04 | 0.048 | 0.059 | 0.071 |
150 | – | – | 0.043 | 0.054 | 0.066 | 0.071 | 0.089 | 0.107 |
200 | – | – | – | 0.077 | 0.092 | 0.095 | 0.119 | 0.143 |
250 | – | – | – | – | – | 0.119 | 0.149 | 0.178 |
300 | – | – | – | – | – | 0.143 | 0.178 | 0.214 |
Geometric free area extract air (blade arrangement V) Ageo [m2]
H/B | 200 | 250 | 300 | 400 | 500 | 600 | 750 | 900 |
50 | 0.007 | 0.009 | 0.011 | 0.015 | 0.019 | 0.022 | 0.028 | 0.034 |
100 | 0.015 | 0.019 | 0.022 | 0.03 | 0.037 | 0.045 | 0.056 | 0.067 |
150 | – | – | 0.034 | 0.045 | 0.056 | 0.067 | 0.084 | 0.101 |
200 | – | – | – | 0.06 | 0.075 | 0.09 | 0.112 | 0.135 |
250 | – | – | – | – | – | 0.112 | 0.141 | 0.169 |
300 | – | – | – | – | – | 0.135 | 0.169 | 0.202 |
Effective air inflow area supply air (blade arrangement H) Aeff [m2]
H/B | 200 | 250 | 300 | 400 | 500 | 600 | 750 | 900 |
50 | 0.006 | 0.007 | 0.009 | 0.011 | 0.014 | 0.017 | 0.021 | 0.026 |
100 | 0.011 | 0.014 | 0.017 | 0.023 | 0.028 | 0.034 | 0.043 | 0.051 |
150 | – | – | 0.026 | 0.034 | 0.043 | 0.051 | 0.064 | 0.077 |
200 | – | – | – | 0.045 | 0.057 | 0.068 | 0.085 | 0.102 |
250 | – | – | – | – | – | 0.085 | 0.106 | 0.128 |
300 | – | – | – | – | – | 0.102 | 0.128 | 0.153 |
Effective air discharge area extract air (blade arrangement V) Aeff [m2]
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
Diffusion grille as supply air or extract air diffuser for the ventilation of rooms in ventilation and air conditioning systems. Consisting of a front border with bevelled edge. Installation preferably in circular or square air ducts, and for wall mounting. Ready-to-install component, consisting of a front border and individually adjustable vertical and/or horizontal blades.
Material
Surfaces
Nominal sizes
Width [mm]
200 - 2000
Height [mm]
50 - 500
For version R, RA
Width [mm]
200 - 1200
Height [mm]
50, 100, 150, 200, 250, 300
Further dimensions on request.
Technical data
Standards and guidelines
Variants
Accessories
Equivalence criteria
Manufacturer of the product
TROX HESCO Schweiz AG
Type
DG
| DG | – | – | – | – | V | – | BS | / | 600 x 200 | / | AS | – | / | / | – | / | / | P1 - RAL 9016 | ||||||||
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
No entry: single grille
E End section
M Middle section
No entry: installation into walls, sills or ducts
R Installation into circular ducts (large duct diameters)
RA Installation into circular ducts with small Ø and additional bend (small duct diameters)
No entry: profile 25 × 40 mm with bevelled edge
F01 Profile 5 × 40 mm without bevelled edge
F02 Profile 10 × 40 mm without bevelled edge
F03 Profile 10 × 40 mm with bevelled edge
F04 Profile 15 × 40 mm without bevelled edge
F05 Profile 15 × 40 mm with bevelled edge
F06 Profile 20 × 40 mm without bevelled edge
F07 Profile 20 × 40 mm with bevelled edge
F08 Profile 25 × 40 mm without bevelled edge
F09 Profile 30 × 40 mm with bevelled edge
F10 Profile 35 × 40 mm with bevelled edge
F11 Without edge
V Vertical front blade
VH Vertical front blade, horizontal air deflection
No entry: without ball impact protection
BS With ball impact resistance without fixing holes
BL With ball impact protection with fixing holes
Suitable for supply air and extract air
No entry: without attachment (front grille only)
AG Damper blade, opposed action blades
AS Hit and miss damper (parallel slide damper)
AB Skimming plate
Only suitable for supply air
SAS Slanted hit and miss damper
LB Perforated sheet metal
Only with attachment LB
A35 made of aluminium, 35 % free ventilation cross-section
V23 made of galvanised steel, 23 % free ventilation crosssection
V28 made of galvanised steel, 28 % free ventilation crosssection
V33 made of galvanised steel, 33 % free ventilation crosssection
V40 made of galvanised steel, 40 % free ventilation crosssection
V45 made of galvanised steel, 45 % free ventilation crosssection
V51 made of galvanised steel, 51 % free ventilation crosssection
V58 made of galvanised steel, 58 % free ventilation crosssection
V66 made of galvanised steel, 66 % free ventilation crosssection
Suitable for extract air
No entry: without filter element
EF with filter element (not with SAS attachment)
11 Fixing
No entry: countersunk holes in front border
VS Concealed screw fixing, for installation with subframe
SL screwless fixing (spring clips supplied seperately)
NO No factory-fitted fixing option
12 Installation subframe
Only with VS fixing
No entry required: without installation subframe
ER with installation subframe
13 Air discharge
No entry: diverging 0°
44 diverging 44°
84 diverging 84°
110 diverging 110°
140 diverging 140°
GEG Opposed
14 Surface
No entry required: galvanised steel
P0 Powder-coated, RAL 9010 (pure white), GU 50
P1 Powder-coated, specify RAL CLASSIC colour, gloss level
PS powder-coated, specify NCS colour and gloss level
Order example: DG-V/400×200/AS/EF/P1-RAL9016
| Type | DG - diffusion grille |
| Variant | Single grille |
| Constrution | Installation into walls, sills or ducts |
| Front border | Profile 25 x 40 mm with bevelled edge |
| Blade arrangement | Vertical front blade |
| Ball impact protection | Without ball impact protection |
| Nominal size [mm] | Width 400, height 200 |
| Attachment | Hit and miss damper (parallel side damper) |
| Filter | With filter element |
| Fixing | Countersunk hole in front border |
| Air discharge | 0° discharge angle |
| Surface | Powder-coated, RAL 9016 (traffic white) |
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Contact
We are here for you
Please specify your message and type of request
Tel.: +41 55 250 71 11 | Fax: +41 55 250 73 10
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +41 55 250 71 11 | Fax: +41 55 250 73 10
