The type B3 roof bases are made from galvanized sheet in the
standard version and designed for installation on flat roofs.
The top and bottom parts are provided with FLS steel flanges
by default. The roof base can be ordered with an EPDM gasket
at one or both ends. Other versions available on request
include roof bases designed for sloping roofs and made from
stainless steel sheet or aluminium sheet. The standard version
of this roof base comes with a DAS shutoff damper; a DAT
damper (air tightness class 4) can be used on request. The roof
base can be installed as a standalone ventilation unit, e.g. in
production buildings. The bottom part of the roof base can
work as a roof air intake or a roof exhaust vent; if a roof fan
or an air intake / exhaust is mounted to the FLS steel flange
of the roof base, the assembly can work as a typical roof vent.
An Alnor, Belimo or Siemens actuator can be added to the
roof base's damper for remote control of the unit.
