发明授权
US08977117B2 Renewable energy hot water heating elements 有权
可再生能源热水加热元件

Renewable energy hot water heating elements
摘要:
Provided herein is a supplemental heating element that may be inserted into a tank of a residential or commercial hot water heater. A collar of the supplemental heating element engages a threaded inlet or outlet of the hot water heater and provides a flow path into or out of the hot water heater while the supplement element is suspended within a tank of the hot water heater.
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