Foam chambers location

[lpfaustini]

According from what I know, one of the best locations to install a foam chamber is upwind. It means that if you have an predominat wind pointing north, you could install it at south position, wind east/foam chamber west, etc.

But, if you have two foam chambers. According to my readings, the foam chambers must be equally spaced circumferentially. The problem is, if I put it upwind, the other one will be downwind. What are my options here? Install them at 90° of the predominant wind?

Thanks in advance,