Solar panels to heat water - flat panels or evacuated tube?
We want to put solar panels on our roof to heat our households water. Is it better to go with the old technology - flat panels- or the new technology - evacuated tubes? We want it to last as long as possible because it is so expensive to put up!
evacuated tube every time trust me
Solar Hot Water: Calpak VTN Evacuated Tube Solar Thermal Collector
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