Poikkilaakso School Helsinki, Finland, AdVent Case 8
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Acronym | AdVent Case 8
Posting Date | 3 October 2009
Country | Finland
Geographic Coverage | International
Abstract | The Poikkilaakso School was a pilot project in which some elements typical for hybrid systems
were combined with mechanical ventilation. The ventilation system is a fully mechanical low pressure
system, having central air-handling unit including filtering, heat recovery, fans, heating
coil and silencers. The aim was to achieve low heating and electricity consumption by using demand
controlled supply ventilation to individual rooms, with air transferred via internal rooms to a
single central exhaust and heat recovery between main exhaust and supply ducts.
Illustrations | 
Description |
Web URL(s) of the case | http://www.buildingadvent.com
Lessons learnt | High user satisfaction has been reported in previous studies. School staff has many times pointed it out
that there is a “feeling of natural ventilation” in the building with no suspended ceilings and no visible
ducts, but the use of displacement ventilation air distribution was found to pose problems, because
in the classrooms desks and small cupboards were placed directly near the diffusers, in some cases
blocking 20 to 50% of the diffuser area. Previous measurements show that south façade
classrooms overheated during hot periods in the summer. This is a result of poor solar protection
and the lack of other relevant measures such as night ventilation cooling or air conditioning.
This school was one of the first designed with a demand- controlled ventilation system and experienced
a number of operating problems. These have been solved in similar schools designed subsequently.
Award labels | none
Additional documents |
Case Languages | Latvian , Lithuanian
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