Water Flow glazing system
The water is circulated in the outer camera of the triple glazing. The water absorb most of the solar heat and this heat is transferred to the heat exchanger, where it is taken and used for building needs: for example - domestic hot water or even for cooling  - when absorption chiller is used. The temperature in the cavity may rise more than 60 degree in hot climates, without heating up the interior. The glazing works as transparent solar collector. At the same time - the heat transfer to the interior is extremely low.

First installed in Qatar Green Building Council, 2016