Het heetwatervat van Ecovat is 30 meter diep en is geisoleerd met een laag bubbeltjesglas Beeld: © Ecovat

Ecovat has designed a system where a supersized tank can store hot water underground. “In conjunction with sustainable systems for generating energy such as solar thermal panels and a heat pump powered by wind energy, the Ecovat system is able to heat thousands of homes without any CO2 emissions in winter. And can cool these down in summer too,” says founder Aris de Groot.

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