2
IBIS
Swegon reserves the right to alter specifications. 20120925 www.swegon.com
Technical description
Design
IBIS duct air diffuser with discs has a diameter that is
compatible with standard duct sizes. IBIS is equipped with
aerodynamically designed discs that have a high induction
capacity. The 160 mm dia. and 200 mm dia. IBIS duct air dif-
fusers are equipped with Swegon’s small discs. The standard
duct diffuser is available in a number of sizes as shown in
Figure 12 as well as in the Dimensions and weights table. There
is an aluminium profiled bracket along the top of the duct. The
bracket runs longitudinally and serves as a flexible mounting
bracket for hanging the duct diffuser from the ceiling.
Materials and finish
The duct air diffuser with discs is made of galvanized
sheet steel and is painted in Swegon’s white standard
colour, RAL 9010. The discs are made of recyclable ABS
plastic. The air diffusers are also available in alternative
standard colours: RAL 7037 dusty grey, RAL 9006 white
aluminium, RAL 9005 jet black, RAL 9007 grey aluminium
and RAL 9003 signal white (NCS 0500).
Customizing
In addition to the size specified, the duct diffusers are available
in alternative sizes, number of discs, etc. For more info, get
in touch with your nearest Swegon representative.
Project planning
The discs are rotatable through 360°. This makes it pos-
sible to achieve an infinite number of horizontal or vertical
air diffusion combinations without altering the airflow,
sound level or pressure drop.
The duct diffusers are well-suited for installation in the
junction of a ceiling with a wall without reducing its
flow capacity. The discs on the back side are then set for
upward air discharge enabling the duct air diffuser to oper-
ate as a air diffuser with one-way air discharge. See Figures
1 and 2 for examples of principle air diffusion patterns.
Normal hanger length is 200 mm. The smallest permit-
ted hanger length is 100 mm which generates slightly
increased throw.
Commissioning
An IBIS C (see under accessories) or a flow measuring damper
installed in the duct system upstream of the duct diffuser is
recommended for commissioning and airflow measurements.
The Methodic errors table and Figure 3 describes require-
ments on straight duct lengths for upstream obstructions.
Accessories
IBIS D: Duct section of the same design as IBIS but
without discs.*)
IBIS C: Sound attenuating measurement and control unit.*)
IBIS B: 45° and 90° bend painted white.*)
IBIS T: T-piece painted white.*)
*) Available for sizes 160-400. For 500 and 630, standard acces-
sories are recommended.
Figure 1. 2-way air discharge.
Figure 2. 1-way air discharge.
Figure 3. Project planning.
Maintenance
The air diffuser can be cleaned, if necessary, using luke-
warm water with dishwashing detergent added or by
vacuum cleaning using a brush nozzle.
Environment
The Declaration of Construction Materials is available
from www.swegon.com.
Methodic Errors
Type of obstruction Length of straight duct (L)
upstream of the IBIS C
upstream of the IBIS C For m2= 5% For m2=10%
One 90° bend. 3 x Ød 2 x Ød
Two 90° bends in the same plane. 4 x Ød 2 x Ød
Two 90° bends in aligment at
right angles to one another.
4 x Ød 2 x Ød
One 45° damper. 6 x Ød 3 x Ød
One T-piece. 4 x Ød 3 x Ød
m2= methodic error. Method for measurement of airflows in
ventilation Installations.
