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Avoid venting clothes dryers to the inside of the home to
supplement the heating system. This practice increases moisture
inside the home and produces a favorable environment for
biological contaminants.
Replace or clean materials in the home that have been water
damaged. Use dehumidifiers in moisture-bearing rooms, such as
basements, to reduce humidity. Relative humidity should be
maintained between 30 percent and 60 percent for occupant
comfort and controlled biological growth.
Use distilled or demineralized water in room humidifiers. Change
the water daily and do not allow scum and scale to develop. Use a
brush or other scrubber to clean the tank while following the
manufacturer’s suggested cleaning methods. If chlorine bleach or
other cleaning products are used, be sure to rinse the tank well to
avoid breathing harmful chemicals.