I am toying with the idea of building a queen castle during some of my winter 'down' time. I am thinking of perhaps a three compartment (3 frames/compartment) box with a telescoping top.

My question is this: Would a screened bottom or a solid bottom be better. I can do either while still keeping each compartment separate and secure.

Are the benefits of increased ventilation greater than subsequent cooler temperatures inside the hive or the extra energy needed to keep the temperature around the brood sufficiently high.

I am in North Dakota - so burning hot summers aren't really a problem.

Thanks for any advice.