Bend in horizontal ducting: TVJ, TVT
Fig. 13: Horizontal bend connection (view from
above)
A bend – with a straight duct section of at least 3B
upstream of the VAV terminal unit – has only a negli-
gible effect on the volume flow rate accuracy.
Bend in vertical ducting: TVJ, TVT
Fig. 14: Vertical bend connection (view from the side)
A bend – with a straight duct section of at least 4H
upstream of the VAV terminal unit – has only a negli-
gible effect on the volume flow rate accuracy.
Bend: TZ-/TA-Silenzio, TVA
Fig. 15: Bend connection, vertical or horizontal
A bend – without a straight duct section upstream of
the VAV terminal unit – has only a negligible effect on
the volume flow rate accuracy
Junction from horizontal main duct: TVJ, TVT
Fig. 16: Junction from a horizontal main duct (view
from above)
A junction causes strong turbulence. The stated
volume flow rate accuracy can only be achieved with a
straight duct section of at least 3B upstream.
Junction from vertical main duct: TVJ, TVT
Fig. 17: Junction from a vertical main duct (view from
the side)
A junction causes strong turbulence. The stated
volume flow rate accuracy can only be achieved with a
straight duct section of at least 4H upstream.
Junction: TZ-Silenzio
Fig. 18: Junction from a main duct, vertical or hori-
zontal
The stated volume flow rate accuracy is achieved even
with a direct connection to the junction of a main duct.
Installation
Upstream conditions > Rectangular ducting
VAV terminal units VARYCONTROL
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