I'm going to add a sun room to the walk-in basement on the south face of my house, possibly as soon as this summer. I'd like to build a
thermosiphon air collector into it to take advantage of clear cold days to heat the floor above. The linked page has a version very similar to designs I've seen elsewhere. I don't want to use up my whole wall since a sun room lets in well... the sun. So I thought I'd throw it to the Dwellars for design/material refinements. I'll be placing a pellet stove along this wall for zone heat. I intend to build with fieldstone for the first couple feet but haven't worked out the height of the front wall yet. IDEAS?