Design your house to be energy efficient at the beginning and all you'll need is an evap unit on the lowest setting to keep you cool for 99.9% of the time - it's not hard or expensive.

I personally like having doors/windows open in summer for fresh air rather than have everything shut.

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MY09 Evo X - 1.6bar@3500rpm - got lag?
Barbagallo - 56.03 (S); 1:08.09 (L)
Collie - 50.77
Possibly the most under-driven Evo X in the world??