man, no ventilation behind, even if ur using air-cond. Hot air circulates behind there, trap and now where to go.

And u should not put the brick beside the 360 coz hot air is coming out from the brick. I put mine near the sliding door where hot air will dissipate outside. My fren has his 360 for nearly 1 year and a half, but no 3rod symptoms. No air-cond summore. Use fan only.