B-Series

Uses less energy than traditional options, with reduced ventilation losses during partial occupancy. It offers a longer lifespan, lower operating and maintenance costs, and is easy to install.

• Ideal for multi-occupancy and intermittently used rooms
• System only runs to level required
• Avoids over-ventilation
• Reduces energy use

B-Series is a range of ventilation systems for multi-occupancy and intermittently used rooms. Using energy efficient ducted fans with intelligent sensing and control, the system meets the ventilation requirements of both new builds and refurbishment projects.

Ideal for applications where rooms are used at different times of the day by a variable number of people, the B-Series system will monitor occupancy, ventilation rate and air quality, and respond accordingly to maintain the atmosphere within preset limits.

Typical Applications
A network of hotel bathrooms, flats or apartments, which require ventilation, but are only used in limited periods particularly in the morning and in the evening.

School classrooms and lecture theatres which are only occupied during lesson time by a variable number of students, but when used must keep CO₂ levels within prescribed limits.

Office meeting rooms or open plan areas which are used periodically during the day by a variable number of staff and visitors, but when occupied must meet required airflow rates.

Automatic sensing and control runs the system according to the maximum demand requirements of the building zone, whether it be carbon dioxide levels, temperature, humidity or air quality – triggered by people entering or leaving the rooms. Common configurations include Electronic Static Pressure (ESP) controllers for constant pressure systems.

System Control
The precise control of the B-Series system, driven by the ventilation requirements of the room means that the system is only running to the level required and only using energy when it is needed. A range of sensors are employed to determine the occupancy of the rooms and manage the system ventilation rates accordingly. This optimises the use of energy whilst meeting the legislation requirements of the building.

This compares to a ‘traditional’ fixed volume system, which in general is either ‘ON’ or ‘OFF’ often using energy to ventilate an empty or half occupied room, over ventilating and wasting energy.

System Overview
The B-Series System is made up of 3 parts: EC/DC Fan Motor, B-Series Integral Control Unit, Sensors and Controls.

The ventilation demands of the room are detected by the wall, ceiling or duct mounted B-Series sensors/switches. These communicate with the B-Series control unit, which in turn drives the fan to the required speed to deliver the airflow. As the ventilation is provided to the room the sensors continuously feedback to the control unit, driving the fan motor to the exact level required in the room at any one time.

System Technology
B-Series demand ventilation is a closed loop controlled ventilation system. Employing a range of sensors to manage the system, demand is sensed by PIR, temperature, humidity, air quality or carbon dioxide sensors. Depending on the levels in the rooms, B-Series’s fan speed is ramped up or down to control the parameters within the required limits. If the room is unoccupied, the system switches off, saving energy and cost to the business. Available in single or twin fan configurations, with twin allowing for load sharing or ‘standby’ for extra reliability.

EC/DC Energy Saving Fan Motor Technology
B-Series utilises the latest EC/DC motor technology, which provides energy saving benefits even over DC motors.

This technology is also infinitely speed controllable and offers increased energy savings across the complete speed control range when compared with conventional inverter drive solutions. The result is higher efficiency, reduced noise, accurate controllability, better speed control drawing less power and as a result better overall system performance.

B-Series can be used in a hierarchal system where maximum demand, for example temperature and/or CO₂ gives priority control of the fan speed or a constant pressure system with room mounted PIR/grilles or in-line damper control.