Vacuum tube collectors There are 5 products.

 Vacuum tube collectors
Vacuum tube collectors use heat pipes for their core instead of passing liquid directly through them. Evacuated heat pipe tubes (EHPTs) are composed of multiple evacuated glass tubes each containing an absorber plate and a heat pipe. The heat from the hot end of the heat pipes is transferred to antifreeze mix of a domestic hot water or hydronic space heating system in a heat exchanger.
The vacuum reduces convection and conduction heat loss to the outside, therefore achieving greater efficiency than flat-plate collectors, especially in colder climate. This advantage is lost in warmer climates, except in those cases where very hot water is desirable, for example commercial process water. The high temperatures may require special system design to prevent overheating.

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