As hot air leaves the attic through vents, it is replaced by air entering through those lower vents.

You must have different vents than we have around here, but the homes around here are also pretty rinky-dink.

One thing that I always think of is fire, when I see those complicated-looking homes with different roof levels... tons of corners for burning embers to settle in.

There's a new home near the freeway that looks like it's made from leftover parts, all dormers and cupolas. It looks like something that would draw fire like a magnet.