This technology has large dhw applications where electric hot water exists and in all areas without a power grid such as third world countries. Free hot water. USA Patent 5,746,653 Australia Patent 720599 New Zealand Patent 335256 New duct technology patent shows how to create an inexpensive duct system that collects all heat evenly within an attic or other cavity for augmenting heat transfer. Also useful for controlled ventilation of the attic. Eliminates the need for roof holes.
Technology has applications in industries outside of the energy field.
View entire patent and claims online.