School: Ventilation control with AMUN 716 R CO2 sensors
The main focus of the refurbishment at Sonthofen Grammar School in Germany was to create an energy efficient building which included automatic ventilation control, which adjusted to actual requirements. Read how the Theben AMUN 716 R CO2 sensors provides a "great atmosphere' in the school.
Pilot project for schools in need of renovation
Lesson鈥榮 over: Open all the windows and let fresh air into the room! That's how it used to be. Such conventional ventilation practices are no longer up-to-date in view of increased demands for energy efficiency in buildings. At Sonthofen grammar school, which has been newly built or converted according to low energy building standards, energy-efficient building services engineering has been chosen with automatic ventilation adjusted to actual requirements. Amun 716 R CO2 sensors control the inflow of fresh air to the classrooms depending of the air quality in the room. This continually ensures a good learning environment with minimal possible energy loss. The energy-saving technology contributes to the whole renovation project acting as a model for hundreds of schools needing renovation and being supported by the Federal Ministry of the Environment.
CO2 sensors counteract poor air quality
Smart boards in place of blackboards show that modern technology is being used in the new classrooms. That also applies to the building services engineering planned by the Kettner & Baur engineering office in cooperation with the HVAC planner to produce an efficient overall system. The school is heated by a condensing gas boiler and a heating pump. The latter is also used for cooling in the summer months. As the realisation that poor air quality has a negative effect on performance and concentration levels has now become widely accepted, air quality and CO2 content are monitored and controlled room-by-room in addition to room temperature control. In addition, the contractor Tannheimer Elektro & Geb盲udetechnik chose Theben CO2 sensors.
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| Theben Amun 716 R CO2 sensors control and control the ventilation in classrooms to exactly meet the requirement for fresh air. |
Values integrated in building controller
The Amun 716 R CO2 sensors measure the carbon dioxide content in the air as well as the relative humidity and activate the controlled room ventilation when the appropriate threshold values have been exceeded. They are ideal for conference and meeting rooms, offices, schools and nurseries, offices as well as passive and low energy houses. In addition, they provide three 0-10 volt outputs for CO2, relative humidity and temperature. In cases where ventilation is directly controlled, two available CO2 switching outputs for twostage control and display of the switching status. A warning signal on the device in the traffic light colours of green, yellow and red displays the CO2 concentration. In this project, the analogue signals are switched via Wago IO inputs to the DDC building control and evaluated there. In turn, these control the ventilation units at several levels. Values are controlled, set point values optimised and switching complete via visualisation.
References (pdf)
"Ventilation control with AMUN 716 R CO2 sensors"
Image source: Elmo Schwandke, Geretsried