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What is a humidifier
A device which increases the relative humidity (RH) in an enclosed space by evaporating water
do I need a humidifier
Some people find breathing easier if the RH is high. Conversely, some people have trouble with high RH and benefit from a dehumidifier (basically the condenser part of an air conditioning system). Your pulmonologist can tell you which of these two possibilities applies to you.
What is a humidifier and do I need a humidifier and do I need to spend 500 quid on a Dyson humidifier?
Humidifier?