That climate battery looks pretty interesting, do you think theres a way to rig it without fans?  Id like to have zero electric hookups... i plan on also using raised beds with stone walls for thermal mass and using no till gardening methods.  

Thanks  i will certainly.

Hi all, this is my first post on permies.  I'm going to be starting a project that involves cob, straw bale, rocket mass heaters, passive solar, cold sinks, and earth sheltering.  I'm hoping to combine these materials and techniques to create a greenhouse in zone 3-4 capable of growing tropical plants.  I have experience as a grower at a very old greenhouse in Connecticut that specializes in tropical plants and I think it will be possible.  Any other techniques that might help?  Ive thought of using a heat tube but thats quite a bit more digging...