Gränichen (Switzerland), 15 January 2021 – The Zehnder Group (SIX: ZEHN), a leading international provider of complete solutions for a healthy indoor climate, was able to partially make up for the COVID-19-related 9% decline in sales in the first semester with an increase in sales of 1% in the second half of the year. The resulting decline in sales for the year as a whole was 4%.