For use in ripening bananas a number of cooling blocks have been built, with water as a cold carrier. With the 6 degree water supplied water, at 42,000 [m3 / h] air flow and a power of 25 [kW], the cell temperature is maintained at 10 degrees. The air flow rate is adjustable with EC technology axial fans. The cooling blocks on legs are fitted with a leak box under the block and are provided with flange connectors for access and drainage of the cold carrier. Also, a number of electrical heating elements are installed for navel heating of the air