“Step onto the plank at dawn. Feel noon from three days ago.”
The Thermal Memory BankOak’s volumetric heat capacity is 1.76 MJ/m³·K. It stores solar gain like a battery. A south-facing Zen-Floor room in Minnesota retained 4.2 °C of passive warmth at 10 p.m. after a 7 °C day (St. Paul Energy Lab, 2025).
The Barefoot Alarm ClockSet no timer. The floor warms beneath your soles at 6:47 a.m.—sunlight stored from the previous afternoon. Cortisol rises gently; no jolt.
The Winter HugIn January, the planks release 11 watts/m² of radiant heat—equivalent to a low-watt bulb, but silent and free.
The Cat’s Prophecy
Watch where the cat curls. That plank holds tomorrow’s sunshine.
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