First eBulletin – list of domestic ventilation units – of the year 2024 published
TZWL from Schwerte publishes current list of domestic ventilation units with and without heat recovery.
TZWL from Schwerte publishes current list of domestic ventilation units with and without heat recovery.
TZWL moves to the headquarters of Schrezenmaier Kältetechnik in Schwerte to modernize its testing facilities
The European Test Centre for Residential Ventilation Units (TZWL) e. V. has built a new test stand for measuring ventilation units for leaks and modernized…
Over the past few years, the Dortmund weather station on the roof of our office building has been measuring temperature, wind speed, rainfall and other…
We would like to inform you that our company will be temporarily closed from March 13 to 17 due to our visit to ISH Frankfurt,…
Why do I need to ventilate? Ventilation is essential to remove unwanted airborne substances such as water vapor, pollutants, fine dust and odors. Ventilation for…
Why do I need a domestic ventilation system? The use of a domestic ventilation system with heat recovery ensures fresh and healthy indoor air and…
How expensive is a domestic ventilation system? A ventilation unit costs between €800 and €8,000, depending on performance and efficiency. In addition, depending on the…
When does a home ventilation system pay off? As a rule, a ventilation system has a minimum service life of 20 years and pays for…
How do I maintain a domestic ventilation system? A domestic ventilation system should be adjusted, maintained and cleaned at least once a year by yourself…
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