Maybe keep engine cooler n combusting better. I know most cutters live in a cooler climate. But in a hot environment? How can extra cooling be a bad thing. Especially on a completely closed air box, with an engine I expect to perform n create heat. I might go a bit bigger hole n line the inside with a coarser screen. If it’s terrible please let me know. I’m sure this has been done in warm climate. Hell they probably just leave all the plastics in the garage or hut. I just haven’t seen. Can always plug the holes with JB Plastic. Humidity? Irrelevant? Unnecessary? Pointless? If this can hurt efficiency I gotta here it.