Apparatus and control method for a hybrid tankless water heater
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United States of America Patent
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Jan 12, 2016
Grant Date -
Oct 31, 2013
app pub date -
Jun 25, 2013
filing date -
Feb 3, 2009
priority date (Note) -
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Abstract
An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature.
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