Hive ventilation

I live in Michigan and am a second year bee keeper. One prob we have is 50-100% of hives are dying during winter. I'm considering building a masonry stove to heat a house and it struck me: is there an optimum ratio of intake to exhaust air as I think of the hive as a flue to provide fresh air and deal with condensation? Can I retain more of the heat generated in the hive by creating that ratio with a sticky board panel on the bottom with a hive body up top redirecting air in and around cedar shavings?
Currently I'm working on a model to utilize Christmas tree lights running through the joist run my hives are sitting on to add just a bit more heat as temps drop. If I can make more of that heat I'd sure like to! I've googled the Missouri masonry stove and created a ratio presented in those designs for intake:exhaust being 3:11. Any comments? Ideas? Experiences?
Thanks

I am not sure if heating the hives is a good idea . I would worry that the bees will wake up and utilise stores faster resulting in starvation later on plus having woken up they may go out to "play " and be killed by the cold .
What sort of hives are you using ? Can you increace the insolation ?

David

not entirely clear what your plan is, Michael. I'm with David on heating hives, though: not generally a good idea. insulating hives and sheltering them from winter wind, on the other hand, can both work well.

elaborate a bit more on your ventilation idea.

Have you considered making some Warre quilts for your hives. Provide insulation, absorb moisture and allow slow ventillation. Pretty good gear IMO.

Cheers
Rob.