Hello fellow forum goers.
I was wondering if anyone of you ever played around with heat exchangers, in the conventional sense instead of teh rocket stove thermal mass sense? All houses, no matter their heating methods need some air intake and exhaust out. Some of the more energy efficient ones use heat exchangers to warm up the incoming air. This problem of sucking in cold air is quite large particularly when using a wood burning stove that requires a large flow of fresh air to function.
Now most commercial heat exchangers are complicated and expensive, but I don't think that they have to be. Has anyone seen, or better yet designed and used themselves, any hand made heat exchangers for the warming up of intake air?
Thanks in advance,