This is Part 1: The core thermal storage system that lets you store summer heat for winter use."

"After researching commercial sand battery deployments in Finland that are cutting heating costs by 70%, I'm building my own system and documenting everything.

Please answer these Questions:

• "Has anyone else built thermal storage systems? What challenges did you face?"
• "What's your current heating cost per month? Let's calculate your potential savings."Use our Calculator offered in an earlier post.
• "Off-grid folks: Are you interested in the hydrogen integration piece for Part 2?"

"I'll be posting updates as I re-build, I have my unit taken apart so as to get good pictures to show folk what I have done so far including actual performance data, costs, and lessons learned. Follow along if you want to escape utility bills and grid dependence. Part 2 on hydrogen integration coming soon."