How would you use one of these?

I'm looking to punch some holes in my pine ceiling in my family room through to the master bedroom (which has ugly low pile carpet) to allow the warm air from the woodstove to take the chill off of the bedroom.

The old section of our house has a version of these, and they help keep the bedroom on that side of the house much warmer.

http://www.wayfair.com/Minuteman-International-Cast-Iron-Register-with-Louvers-JR-14-XMM1096.html

I think I'd need 2 pieces, a register and a grate? how do I seal off the box so that I'm not heating into the ceiling/floor but rather just opening a short tunnel between the 2 rooms?

Thanks!

Contact a local sheet metal shop. They can make a 2 piece sleeve for it. Make one sleeve a bit smaller than the other, slide inside of each other.

Buy some aluminum flashing and make your own 2 piece. L shaped pieces with tabs drilled out for pop rivets?

hand held right angle drill is a plus.

Might want to check local firecodes.

Gary

Fire hazard, not worth the risk, IMO. Your insurance company may not like the idea, either, especially in the event of a claim.

These change directions of air currents and can direct air away from a smoke detector. Old houses with gravity fed furnaces had these usually in the corner of a room.