"Heat Recovery Ventilation Systems"
Humans can live for a long time without water and even longer without food. However, take away the air, or poison it, and the human body will shut down and eventually stop working. This is how important breathing is and so you would think that the quality of air would rank up there with the highest concerns for living.
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"Air Exchanging for Health"
Many people are astounded to hear that one of the most dangerous air quality areas in the world is right in the home. Like a smog-filled atmosphere the air in a home can get loaded with dust, bacteria, mold spores and insects. Since mankind went indoors for shelter from the elements air quality has been a major concern.
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