Table 1.

Description of places tested

Places tested	Number of tested objects	Description
Mould-infested residential rooms	10	Signs of mould on walls. Tests performed in bathrooms (5), kitchens (3) and living rooms (2). Rooms without air conditioning system. Tested in months: October–May Air humidity in homes RH = 50–75 %, temp. 15–20 °C
Residential rooms without signs of mould	10	Tests performed in bathrooms (5), kitchens (4) and living rooms (1). Rooms without air conditioning system. Tested in months: October – May Air humidity in homes RH = 30–60 %, temp. 18–25 °C
Rooms in schools	3	A primary school classroom (1; for 20 pupils), and college lecture halls (2; numbers of students 25 and 50). Rooms without air conditioning system. Tested in months: October–May Air humidity RH = 35–50 %, temp. 20–22 °C
Rooms in hospitals	3	An operating room (1) and wards (2; number of beds 6). Rooms without air conditioning system. Tested in months: October–May Air humidity RH = 30–40 %, temp. 19–22 °C
Production halls in a pharmaceutical plant	2	Rooms in controlled “grey” zone, hall with equipment for grinding of bacteriostatic substance (1), herb packing hall (1). Rooms with air conditioning system. Tested in months: October–May Air humidity RH = 42–50 %, temp. 18–20 °C
Rooms in libraries and archives	4	Library storerooms (2), archive storerooms (2). Rooms without air conditioning system. Tested in months: October–May Air humidity RH = 27–51 %, temp. 15–23 °C
Rooms in museums	4	Storerooms containing martyrological objects (1), works of folk art (1), textile objects (1), a conservation laboratory (1). Rooms without air conditioning system. Tested in months: October–May Air humidity RH = 30–50 %, temp. 19–22 °C. Numerous visible symptoms of biodeterioration of museum objects
Outdoor air	6	Tests of outdoor air were performed every 2 months in the centre of a city (population c.1 million). Tested in months: October–May