The cells had hydraulic doors and air-conditioning.

NEWYORKER: The Black Sites

The cells could then reduce peak power demands air conditioning would be making on the electricity grid, leveraging their own economic value.

FORBES: Connect

Cells have been converted into cosy rooms, while the cloister houses an open-air bar.

BBC: Mini guide to Naples, Italy

Generators powered by fuel cells quietly whir and produce half the heat of diesel as they combine hydrogen with air to create electricity.

FORBES: Don't put one of these in your garage just yet.