AIVC - Air Infiltration and Ventilation Centre

Search form

EBC

You are here

Home  |  school ventilation

Minimal Invasive Ventilation Systems with Heat Recovery for School Buildings

Rainer Pfluger, Kai Längle, Gabriel Rojas, 2015
Active overflow ventilation | school ventilation | heritage protected | minimal invasive
Bibliographic info: 36th AIVC Conference " Effective ventilation in high performance buildings", Madrid, Spain, 23-24 September 2015.
Languages: English Pages (count): 11

This paper presents different ventilation solutions for the retrofit in existing school building with a special focus on historic buildings. These building usually pose a major challenge for the integration of energy efficient ventilation systems, i.e. with heat recovery. For decentralized systems, the ductwork can be minimized by wall integrated heat recovery units, whereas for central systems, a horizontal air distribution in the attic combined with vertical ducts was found to be a possible solution for listed buildings. Former is problematic for aesthetic reasons due to visibility of the outer wall inlets, especially when no exterior insulation layer can be applied. A central unit with vertical ducts has the drawback of requiring many fire protection flaps, which are associated with high maintenance costs. Therefore a new ventilation system was designed and tested for a listed school building in Innsbruck (Austria), which is one of eight case study buildings within the EU-project 3ENCULT. In order to minimize the ductwork within the building, an active overflow system takes the air from the corridor to the class room and vents the extract air back to it. A central heat recovery system ventilates the staircase and the corridors with preheated fresh air. The prototype of the active overflow system, the control strategy and the simulation results are presented. To show the potential variants when implementing the active overflow principle, a further school building which will be energetically refurbished within the EU-project SINFONIA is presented. Here the HVAC-planning foresees the implementation of the active overflow concept with and without dedicated extract air ducting.


Related publications

Mandatory or voluntary building airtightness testing has come gradually into force in m
INIVE eeig, EU
This report summarizes the work of the initial working phase of IEA ECB Annex 62 Ventil
Maria Kolokotroni, Per Heiselberg, Lorenzo Pagliano, Jie Han, Regina Bokel, Peter Holzer, Annamaria Belleri, Denmark
This summary report presents insights on recommendations into how ventilative cooling i
Christoffer Plesner, Flourentzos Flourentzou, Guoqiang Zhang, Hilde Breesch, Per Heiselberg, Michal Pomianowski, Peter Holzer, Maria Kolokotroni, Annamaria Belleri, Denmark