![Heliodons](https://d27wgn5g4t3wja.cloudfront.net/img/2399701e-d472-4f2d-8441-163fd9e56f92/267734.png)
Heliodons
The heliodon is a device to evaluate the performance of a model under clear sky. The model can be a scale model of windows to a part of a building or a part of urban environment.
The heliodon is a device to evaluate the performance of a model under clear sky. The model can be a scale model of windows to a part of a building or a part of urban environment.