The company has a further option for another Hoegh ship at Hyundai Heavy Industries in Korea that is valid until December.

The units will be supplied with seawater filter and steam/seawater heating modules.

The system to be supplied for Gazprom will be "winterised" to operate in temperatures as low as minus 30°C.

"By utilising seawater for heating, CO2 emissions are far less than solutions using steam heating," Wartsila said.

The