The stratified air distribution improves indoor air and effectively removes aerosol particles from room air, e.g. in care rooms


Preliminary research results just published by Aalto University, the Finnish Meteorological Institute, VTT and the University of Helsinki show that aerosol particles carrying the coronavirus can last longer in room air than previously thought. Aerosol particles escape from the airways when coughing, sneezing or even talking. 

With Stravent’s stratified ventilation technology, pollutants are not retained in the room air for a long time, as the technology can be used to create a permanent layering of air in the room. In case of stratified ventilation, air is blown at a high speed towards the wall, from where it flows along the wall down to the occupied area. In this way, an air mattress is formed on the floor, which is then directed upwards as a thermal flow due to the heat. 

In practice, this means that there is always fresh air in the occupied area, while all air pollutants are directed to the top of the room and thus to the exhaust ventilation. The stratified ventilation has been extensively studied in Sweden, e.g. in Gävle University.

The stratified ventilation significantly improves the quality of the room air

Read more about stratified ventilation and research on it hereäästä-energiaa-EU-tavoitteiden-mukaisesti and here


Ecoclime products support our customers' environmental strategy with their lower life-cycle costs, longevity and their maintenance-free and durable polymer structure. They improve quality, reduce waste and promote sustainable development.


The site on the edge of the old church park will become Helsinki’s largest congress hotel. The office building will be renovated into a 350-room hotel and is scheduled for completion in summer 2022. 


According to Jussi Ainamo, Design Director, the long-term cooperation between Sweco Talotekniikka Oy and Stravent Oy is based on a good product, the correctness of dimensions and professionalism. 


The second phase of the West Metro is under construction from Matinkylä in Espoo to Kivenlahti. In all, a seven kilometre long line and five new stations are under construction: Finnoo, Kaitaa, Soukka, Espoonlahti and Kivenlahti.

Stravent Oy
Piispantilankuja 4
02240 Espoo
(09) 4241 3630
Satanolla Oy