ETC Type Solar water heater

Evacuated Tube Collectors (ETC) based Solar Water Heaters Evacuated Tube Collector is made of double-layer borosilicate glass tubes evacuated for providing insulation. The outer wall of the inner tube is coated with selective absorbing material. This helps the absorption of solar radiation and transfers the heat to the water which flows through the inner tube. There are 44 MNRE approved ETC based solar water heating suppliers.

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