Non-powered Condensation Control Mechanisms for Shelters

"Federal Fabrics-Fibers (FFF) proposes a double walled shelter with a moisture permeable inner layer and a vented outer shell. The differential temperature between the inside and the outside will create a natural convection driven air flow between the twolayers. This air flow will be used to carry away evaporating moisture from the inner shelter skin. Un-coated fabric woven from fibers with known moisture transport capabilities such as micro-capillary polyester will be used as the inner skin layer on theroof section of a two skinned shelter. The outer coated fabric needs a controlled window/vent that can be open when desired to allow the convective air to be circulated next to the un-coated fabric, and exhaust the moisture to the atmosphere.FFF will Identify and test un-coated fabrics with moisture transport capabilities suitable as an inner shelter skin. Develop and mature a controlled vent that will allow high rates of natural convection airflow between the moisture transport skin and aweather proof skin. The vents will be constructed in such a manner as to prevent rain from coming in between the two skins without mechanically weakening the shelter. Test the idea using a double walled, vented shelter to determine under what conditions itwill and will not function adequately. There are several commercial applications for this type of product outside of the obvious military applications. Including backpacking and expedition tents."