Energy efficient circulation system for spas and hot tubs
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United States of America Patent
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-
Sep 6, 2011
Grant Date -
Nov 20, 2008
app pub date -
May 17, 2007
filing date -
May 17, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for circulating water in a bathing installation with a water circulation flow path and a tub for holding bathing water is described. A pump is submerged in a chamber in the circulation flow path so that the pump when operated provides a positive pump pressure to pump water through the circulation flow path from an inlet opening to an outlet opening. Thermal contact is provided between a pump housing surface and water in the chamber to allow heat transfer between the pump housing surface and water in the chamber.
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