The spaces shall be provided with an automatic ventilation
system to meet fresh air ventilation requirements in line with
BB101 guidelines for ventilation. This includes preventing
summertime overheating and including the ability to provide a daily
average of 5l/s/person of fresh air year round and the capability
to deliver 8 l/s/person at any time (or more for a reduced
occupancy for example if designing to CIBSE Guide A).
The system shall include two atrium-room exchange units
incorporating acoustic attenuating baffles and a fan, and a central
controller. The unit shall be connected to grilles in the room.
In winter the controller will control the windows or dampers
atop the atrium which shall be used for fresh air intake &
exhaust. One atrium-room exchange unit will draw atrium air into
the room, and the other atrium-room exchange unit will draw air
from the room into the atrium. The rates of air flow will be
regulated to maintain air quality and temperatures within the room
and atrium to the necessary levels.
In summer the atrium-room units will operate to promote air flow
out of the room into the atrium as a buoyancy-driven natural
ventilation system, with provision for automatic fan assistance to
buoyancy-driven ventilation flows when required. The units will
work in conjunction with opened windows on the façade of the
space.
Each room will be automatically controlled via a combined
temperature / CO2 sensor in each room, a common external
temperature sensor, and CO2 / temperature sensors within the atrium
to determine the operation of the units.
A 2-gang switch plate with lamps to indicate when windows should
be open/closed will be located in each room.
E-Stack roof-based systems (R-Series
and S-Series units)
The spaces shall be provided with an automatic ventilation
system to meet fresh air ventilation requirements in line with
BB101 guidelines for ventilation. This includes preventing
summertime overheating and including the ability to provide a daily
average of 5 l/s/person of fresh air year round and the capability
to deliver 8 l/s/person at any time (or more for a reduced
occupancy for example if designing to CIBSE Guide A).
The system shall include a ventilation unit incorporating
insulated dampers, an internal fan mixing system and an integral
controller. The unit shall be connected to grilles in the room and
to a shaft leading to an external weatherproof penthouse louvre
unit above.
In winter the shaft shall be used for fresh air intake &
exhaust. The unit at the base of the shaft shall mix the incoming
cold air with sufficient hot interior air, using low energy e-stack
fans, prior to the fresh air entering the occupied space in order
to minimize the risk of cold draughts.
In summer the unit will operate as a buoyancy-driven natural
ventilation system, with provision for automatic fan assistance to
buoyancy-driven ventilation flows when required. The unit will work
in conjunction with opened windows on the façade of the space, with
air being drawn from the room into the unit & then discharged
to outside via the shaft.
Each unit will be automatically controlled via a combined
temperature / CO2 sensor in each room & a common external
temperature sensor to determine the operation of the unit.
The unit will be capable of automatic, secure night cooling when
appropriate, allowing cool air to enter the space via the unit, and
using fan assistance if required.
A key switch for control and a 2-gang switch plate with lamps to
indicate when windows should be open/closed will be located in each
room.
The roof terminal units shall incorporate weatherproof openings
with the required aerodynamic effective area to ventilate the
rooms. The units shall incorporate a bird guard, roof section
designed to attenuate rain noise, and finish to the required
standard RAL colour.
E-Stack facade-based systems (F-Series
units)
The spaces shall be provided with an automatic ventilation
system to meet fresh air ventilation requirements in line with
BB101 guidelines for ventilation. This includes preventing
summertime overheating and including the ability to provide a daily
average of 5 l/s/person of fresh air year round and the capability
to deliver 8 l/s/person at any time (or more for a reduced
occupancy for example if designing to CIBSE Guide A).
The system shall include a ventilation mixing unit beneath
variable control insulated dampers or a window, with an integral
controller and grilles. The unit shall be used to control at least
one further window on the same façade.
In winter the unit will open the window or variable control
damper above the ventilation unit and one other window. The
ventilation unit beneath the VCD/window shall mix the incoming cold
air with sufficient hot interior air prior to the fresh air
entering the occupied space in order to minimize the risk of cold
draughts.
In summer the unit will operate as a buoyancy-driven natural
ventilation system, with provision for automatic fan assistance to
buoyancy-driven ventilation flows through the window/VCD above the
unit when required. The unit will work in conjunction with opened
windows on the façade of the space.
Each unit will be automatically controlled via a combined
temperature / CO2 sensor in each room & a common external
temperature sensor to determine the operation of the unit.
The unit will be capable of automatic, secure night cooling when
appropriate, allowing cool air to enter the space via the unit, and
using fan assistance if required.
A key switch for control and a 2-gang switch plate with lamps to
indicate when windows should be open/closed will be located in each
room.