Nearly all the power a data center draws comes back out as heat. Today it’s pushed into the air through cooling towers and fans — burning still more energy and water to get rid of it. It doesn’t have to be wasted. We catch it at the fence line and put it to a second use: a year-round growing climate next door.
It isn’t exotic energy. It’s the warm air and water a data center already makes — and already pays to throw away.
A modern facility turns almost all of its electricity into heat. Most of it leaves the building at roughly 35–50 °C: too cool to spin a turbine, too plentiful to ignore. Conventional sites spend additional power and water rejecting it — evaporating it in cooling towers, blowing it off with banks of fans.
A greenhouse wants exactly that temperature. So instead of fighting the heat, we move it one wall over and let it do the one job it’s well suited for: keeping plants warm through the night and the winter.
A standard heat exchanger and a buffer tank sit between the facility and the greenhouse. The data center’s loop and the growing loop trade warmth across a plate — they never mix. Proven hardware, nothing experimental.
Three steps, all of them ordinary. The novelty isn’t the hardware — it’s putting it on the same fence line.
Warm water or air comes off the facility’s existing cooling loop — the same heat it would otherwise reject.
It crosses a heat exchanger into the greenhouse’s own closed loop. A buffer tank banks warmth for the cold hours after midnight.
The greenhouse holds a steady climate year-round on heat that used to vanish. No new fuel, no combustion.
This is reuse, not generation. We don’t reduce what the data center computes, and we don’t claim to. The heat exists whether or not anyone catches it; we simply route it somewhere useful before it’s vented.
It’s also low-grade by nature. Heat at ~35–50 °C is right for a greenhouse and wrong for almost anything that needs high temperatures. We size the harvest to what the heat can honestly do, and we meter it so a town can check the number itself.
Reuses rejected heat. Never more than that — and never less.