I have looked into the icf. Not seriously yet. But I have priced out materials. Seams that they have an r17. I've estimated the cost at 7k for the icfs to do my foundation. But the rigid foam might be the winner. As it's only 2k to do the foundation and have an r20. But it's not totally out of the question yet. I am considering solar heating but that might be down the road a little ways yet. I forgot to mention that I will be building a large garage at the same time of the house. Should be something around 40x50 with a slab. I do plan on putting radiant in that. I did consider putting the tubing in the slab of the basement. But I've also considered doing a dual zone for the fro thermal and just havin. It do both the main floor and the basement.
In another thread I started I started building a waste oil burner. I plan to continue the development of that and use that to help with heating house and garage.
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