4.2. What is the normal range of the air relative humidity for residential premises? Choose the correct answer:

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4.2. What is the normal range of the air relative humidity for residential premises?
Choose the correct answer:
1. 20-40%;
2.
20-50%;
3.
30-60%;
4.
35-70%;
5.
40-80%;
Transcribed Image Text:4.2. What is the normal range of the air relative humidity for residential premises? Choose the correct answer: 1. 20-40%; 2. 20-50%; 3. 30-60%; 4. 35-70%; 5. 40-80%;
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