<http://schema.org/description>
"In order to maintain an allergen-free home, it is important to monitor your home climate systems. This means making sure your air conditioner, dehumidifier and heaters are not generating allergens."^^<http://www.w3.org/2001/XMLSchema#string>
<http://health.howstuffworks.com/diseases-conditions/allergies/indoor-allergies/how-to-allergy-proof-your-home-climate-control-system.htm>