Diffusion grilles type DG

DIFFUSION GRILLES TYPE DG

DIFFUSION GRILLE MADE OF SHEET STEEL FOR VERSATILE USE

The high-quality Swiss diffusion grille integrates perfectly into any room.
Suitable for comfort and industrial areas for walls, sills, circular or rectangular air ducts
Single piece available in the nominal sizes 200 × 50 to 2000 × 500 mm
Adjustable blades allow for divergence
Air volume regulation thanks to various attachments
Simple fixing options for quick and easy installation
Available in various RAL Classic or NCS colours as well as with a galvanised surface

Options

Ball impact protection grille
Filter element
Attachment for flow channel
Linear run section

General information

Application

Diffusion grilles type DG as air diffusers (supply and extract air) for comfort and industrial zones
Directed supply air flow for mixed flow ventilation
Blades are adjustable to meet different local requirements
For constant and variable volume flows
For supply air to room air temperature differences from –12 to +4 K
For installation in walls, sills, circular or rectangular air ducts

Special characteristics

Individually adjustable blades
Countersunk hole, concealed screw fixing with installation subframe, screwless fastening
Filter element for extract grille optional

Variants

Various border sections
Various blade arrangements
Ball impact protection
Linear run section
Countersunk hole in front border
Non-perforated front border, without factory-fitted fixing option
Concealed screw fixing with installation subframe
Screwless fixing

Attachments

Volume flow rate balancing on site

AG: Damper blade with opposed action blades
AS: Hit and miss damper made of aluminium (parallel slide damper)
AB: skimming plate
SAS: slanted hit and miss damper made of aluminium
LB: Perforated sheet metal

Parts and characteristics

Front border made of flanged profile
Individually adjustable, horizontal/vertical blades
Perimeter seal, factory-fitted
Vertical centre mullion for nominal lengths over 600 mm

Accessories

Filter element for extract grille
Installation subframe

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

Vertical and/or horizontal blades
Countersunk hole, concealed screw fixing with installation subframe, screwless fixing

Suitable air duct diameters

Ø100 - 2000 mm

Note: The possible round air duct diameters are reduced depending on the grille height.

Material

Galvanised steel front border
Galvanised steel blades
Filter made of synthetic material
Foam seal

Standards and guidelines

Sound power level in air-regenerated noise measured according to EN ISO 5135
Filter class ISO Coarse 45% according to ISO 16890

Surfaces

Front border and blades without coating (sendzimirgalvanised steel)
Front border and blades powder-coated in RAL 9010 pure white, GU30
Front border and blades powder-coated according to RAL CLASSIC colour palette GU30
Front border and blades powder-coated according to NCS

Maintenance

Maintenance-free, as construction and materials are not subject to wear and tear
Inspection and cleaning according to VDI 6022

Technical information

Schematic illustration of diffusion grille DG-VH-AG

1 Front border standard

2 Blades vertical, horizontal

3 Attachment damper element, opposed action blades (galvanised border, aluminium blades)

4 Countersunk hole

5 Surface powder-coated RAL 9010 (P0)

Schematic illustration of diffusion grille DG-VH-AS

Grille installation with ceiling effect (side view)

Grille installation with ceiling effect (top view)

Grille installation without ceiling effect (side view)

Grille installation without ceiling effect (top view)

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.

Correction factors

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

Galvanised steel front border
Galvanised steel blades
Filter made of synthetic material
Foam seal

Surfaces

Front border and blades without coating (sendzimirgalvanised steel)
Front border and blades powder-coated in RAL 9010 pure white, GU30
Front border and blades powder-coated according to RAL CLASSIC colour palette GU30
Front border and blades powder-coated according to NCS

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

Design-specific

Standards and guidelines

Sound power level in air-regenerated noise measured according to EN ISO 5135
Filter class ISO Coarse 45% according to ISO 16890

Variants

Various border sections
Various blade arrangements
Ball impact protection
Linear run section
Countersunk hole in front border
Non-perforated front border, without factory-fitted fixing option
Concealed screw fixing with installation subframe
Screwless fixing

Accessories

Filter element for extract grille
Installation subframe

Equivalence criteria

Uniform, adjustable air pattern
Grille available in various colours
Optional preset divergence
Various optional mounting kits for restricting and balancing the grilles
Various fixing systems for common applications
Ventilation data and acoustic data verified by laboratory measurements
Dust and scratch protection thanks to individual packaging
sheet steel, sendzimir-galvanised

Manufacturer of the product

TROX HESCO Schweiz AG

Type

–

600 x 200

–

P1 - RAL 9016

1 Type
DG Diffusion grille

2 System

No entry: single grille
E End section
M Middle section

3 Construction

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)

4 Front border

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

5 Blade arrangement

V Vertical front blade
VH Vertical front blade, horizontal air deflection

6 Ball impact protection

No entry: without ball impact protection
BS With ball impact resistance without fixing holes
BL With ball impact protection with fixing holes

7 Nominal size [mm]
Specify width × heigh

8 Attachment

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

9 Perforated metal variant

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

10 Filter

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)

Downloads

product information

Product data sheet DG

DG--HESCO-2024-version-_PD_2024_08_26_DE_en Product data sheet 2 MB pdf

certificates

Declaration of hygiene conformity DG

DG_HC_2024_08_CH_en Declaration of hygiene conformity 820 KB pdf
Manufacturer's statement DG

DG_CE_MS_2024_08_CH_en Manufacturer's statement 750 KB pdf

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