SolarBox 2.0. We installed the collector on the office building in 2019 as additional heating. It's amazing. In spring and autumn, almost half covered the need for heating. Especially it helped us on weekends because the office didn't heat. And the air collector works on weekends and maintains the temperature. Not many sunny days in winter, so it didn't help much.
I advise everyone to SolarBox. I use it to heat a private house. It was possible to hang on the sunny side. First bought one, then another. The effect is clearly positive. It is difficult to measure in some units, but in spring and autumn my gas boiler is turned on only in the evening. If it is a sunny day, then the heating day is not included at all. the temperature from the collector reached 45 degrees.
SolarBox 0.7 solar air collector was purchased for room ventilation. The apartment is cold and daily, even continuous ventilation significantly reduced the already low temperature in the apartment. Satisfied with the work of the collector. Fresh heated air always circulates in the presence of the sun. In the summer we turn it off and do not use it. Very satisfied. We recommend.
There was a problem of humidity in the garage. Installed on the south side of the SolarBox 0.7. Very pleased. In sunny weather, heated air enters the garage and ventilates it. I recommend