Propuhtaus is a private trader company founded in February 2019. The company is owned by Tarja Valkosalo. Propuhtaus produces educational material for cleaning organisations, and publishes e-learning courses and articles based on scientific research. The aim of the company is to produce up to date knowledge-based learning material by following closely scientific research related to cleaning work and environmental cleaning.

Tarja Valkosalo has worked over 30 years in the professional cleaning industry in many positions. She has graduated from University of Helsinki, Faculty of Agriculture and Forestry, after studying home technology. Professional cleaning was part of the studies. During her career, she has, among other things – made manuscripts for several cleaning textbooks, videos and e-learning courses – worked as a teacher to educate cleaners and supervisors – been the editor-inchief of a professional cleaning magazine – arranged two international scientific congresses in the field of professional cleaning – represented Finnish professional cleaning sector at Nordic and European meetings – been a member of several development project steering groups. During the ongoing corona pandemic she has written articles about coronavirus and cleaning both for company website and for professional journals in the field of environmental health. She has also given lectures about corona cleaning. She has worked on a project with responsibility for monitoring coronavirus-related research (Tampere University and Tampere University of Applied Sciences project funded by Business Finland). Tarja is currently project manager of the project “Cost Effective, Need Based Cleaning- INSTA800” 2019-1-EE01- KA202- During the project, information materials have been developed on how to transfer knowledge from the INSTA800 standard in 7 different Nordic and Baltic countries. In addition, time matrices and effective training programs are currently being developed (the project period is 2019-2022).