Volume I
The Heat Vault
Furnace-free heat that pays for itself: seal the house, bank the heat, catch the sun, burn clean.
44 chapters across 6 parts7 schematic diagrams
Backed by a 7-day money-back guarantee
What's included
- 44 chapters across 6 parts
- 7 schematic diagrams
- Air sealing and insulation before anything else
- Sand, water and masonry: what thermal mass really stores
- Soda-can panels, rocket mass heaters and the wood-stove coil, priced
- The fuel ladder and 8 worked payback calculations
Digital PDF — read on any phone, tablet, or computer
Instant download by email — no waiting, no app to install
Covered by a 7-day money-back guarantee
A look inside
View full page
View full page
View full pageWant the complete archive?
Get all 3 volumes in one purchase.