Biddle Innovair School, Installation, Operation & Maintenance Instructions Manual, Page: 4 / 27

Page 4 v2.1
Section 1. GENERAL INFORMATION - continued
DUCT / SPIGOT CONNECTIONS
FRESH AIR INLET CONNECTIONS 2 Standard Styles
(Back or Base position)
DISCHARGE & RETURN AIR CONNECTIONS 3 Optional
Styles
(On Recessed / Chassis units only)
1284
24.5
207
=
=
27.5
4 x 250
PITCHES
5 x 200 DIA
SPIGOTS
=
=
131
37
1695
100-160
211.5
10
4 x 310
Pitches
208.5
121
=
=
5 x 200 DIA
Spigots
37 mm Deep
1693
207
100
T
ELESCOPIC DUCT SECTION (S
PIGOT
) E
XTENSION
P
IECE
P
LENUM
B
OX
Use where an adjustable short duct section is
required to connect to the Biddle linear grille.
The telescopic duct is sized to accept the
standard Biddle Air grille.
Use where the discharge or return air will
connect to the Biddle linear grille but the
connection needs to be longer than 160mm.
The spigot extention piece allows
connection of ducting (by others) of a cross -
section suitable for the Biddle grille.
Purpose made plenum box for
connection of circular ducting. Blanking
caps are available for spigots not used
but only one or two should be blanked at
any one time. Specially sized spigots are
available. Contact the sales office.
Figure 1c
Figure 1d
(optional – cannot
be used with attenuator
)
Figure 1e
Figure 1f
Figure 1g