I put together a PC for my brother. The power supply fan is facing downward. He's keeping it on a board below his desk, but the case itself is bigger than the board, so the ends hang off, including where the power supply ventilation is. It's not touching carpet, but it's right above it, so I just wanna make sure it's nothing to worry about. I'm assuming it's fine as long as it isn't physically on the carpet, but I'm paranoid