These high efficiency dehumidifiers remove odor-causing moisture and can maintain 50% relative
humidity as recommended by the EPA, ASHRAE ( American Society of Heating, Refrigeration and Air Conditioning ),
American Lung Association and American Medical Association.
Polyethylene Moisture Barriers – The practice of installing 6-millimeter polyethylene on crawl space surface to assist in the control of excess moisture vapor. Clemson University Regulatory Public Service Programs and Department of Pesticide Regulation recommends 80% ground coverage.
Temperature Control Ventilators – These passive vents are widely used and work well to ventilate most crawl spaces. They are temperature sensitive: opening completely at approximately 70®F and closing at approximately 40®F.
Power Vents – When more aggressive ventilation systems are required, power foundation vents with a thermostat and humidistat are the best option. Power vents are usually recommended when a residential property does not meet one (1) vent per 150 square feet around the perimeter of structure.
Exhaust Fans – Utility Shutter Mounted Exhaust Fans are designed for the purpose of increasing crawl space air flow. Timer required and U.L. approved wiring.
French Drains – French Drain or weeping tile is a trench filled with gravel or containing perforated pipe that re-directs surface water and ground water away from an area. This is a useful system for the removal of standing water from a crawl space.
Sump Pumps – The purpose is to help keep basements or crawl spaces dry.