
Moisture Control

Too much moisture in a home can lead to mold, mildew, and other biological growth. This in turn can lead to a variety of health effects ranging from more common allergic reactions, to asthma attacks. Excess moisture can be in the form of high relative humidity including humidity generated by people and their activities such as showers, cooking, or drying clothes. Moisture can travel with infiltrating outdoor air (or exfiltrating indoor air) through the building shell, including the foundation. In addition to health problems, high relative humidity or water that enters building cavities that is not allowed to dry quickly can lead to problems such as rot, structural damage, and premature paint failure. (U.S. EPA)
Questions to Ask the Homeowner

Are you seeing damage to windows and woodwork? As homes are sealed up with insulation and caulking to save energy, excess humidity from cooking, laundry, bathing, and even the building materials themselves, builds up and becomes trapped inside
Do you have dry skin, cracked nasal passages or experience static electricity shocks? These can all be symptoms of excessively dry air which can also aggravate respiratory ailments, cause woodwork to shrink and crack and loosen furniture joints.
Do you constantly run a portable dehumidifier? Running your dehumidifier, or air conditioner, to remove excess moisture can send your electricity bills skyrocketing.
Product Solutions

Honeywell Whole House Dehumidifier
Every customer is looking for increased comfort AND energy Efficiency, and with TruDRYTM DH90, you can offer both. TruDRYTM efficiently removes excessive moisture from the air each day.
Honeywell Evaporative Flow-Through Humidifiers
Enhance and protect the home, while controlling to an optimum humidity level. Humidifiers help preserve the house structure, woodwork, artwork and fine wood and furnishings.
Honeywell Fresh Air Ventilation System
The ER150 and ER200 Perfect Window™ Fresh Air Ventilation Systems provide proper levels of ventilation with energy savings by transferring heat and moisture between the exhaust and fresh air streams.

Contractors should learn as much as possible about green techniques, tools, and equipment. Organizations such as the Green Mechanical Council, LEED, or Energy Star all have information that can help contractors learn more about green construction, as well as the various ratings programs that are available.
http://customer.honeywell.com/techlit/pdf/50-0000s/50-8422.pdf