Kitfox2009- Good point. Required North of the border. I'd also go with the hot water manifold type if I felt the need. No issues with carb. ice yet with the intakes by the firewall. I do spend most my time in the desert so moisture usually isn't a problem. Unusual for dew points and temps to get within 10 degrees of each other.
I'll deffer to the guys that fly in moister climates for their experiences in this matter.