That's a man's work!... (no offence if you are a woman)

Perfect, now all you need is a gate-T so you can manually route heat into the house in the winter!

Don't forget to varnish that wood! (Or wax it)

You may want another intake, if that doesn't have a booster-fan in there too. Always have a larger intake than exhaust, because the exhaust is compressed and the intake is negative. You want to reduce negative pressure so it does not pull air from other doorways or windows or wall-outlets.