A fuel storage and distribution system for a gas-fuelled sea-going vessel, comprising: - a gas tank for storing gas fuel, a major portion of which is in liquefied form, - a tank room that constitutes a gastight space enclosing tank connections to and from the tank room and valves associated with them, - a part of a refrigeration or air conditioning circuit reaching into said tank room, and - a first local heat transfer circuit in the tank room , which first local heat transfer circuit is configured to receive heat from said part of the refrigeration or air conditioning circuit in said tank room, characterized in that the fuel storage and distribution system further comprises - in its first local heat transfer circuit a first local heat transfer re-boiler and a first local heat transfer condenser , and wherein part of a refrigeration or air conditioning circuit constitutes a hot element within said first local heat transfer re-boiler , and arranged to transfer such received heat to liquefied gas fuel handled in the first local heat transfer re-boiler and the first local heat transfer condenser in said fuel storage and distribution system, - a pipe leading gas fuel through a cold element within said first local heat transfer condenser and - a part of an engine cooling circuit reaching into said tank room ; - a second local heat transfer circuit in the tank room , which second local heat transfer circuit comprises a second local heat transfer re-boiler and a second local heat transfer condenser , wherein part of an engine cooling circuit constitutes a hot element within said second local heat transfer re-boiler , and which second local heat transfer circuit is receiving heat from said part of the engine cooling circuit in said tank room and transferring such received heat to liquefied gas fuel handled in the second local heat transfer re-boiler and the second local heat transfer condenser in said fuel storage and distribution system, - a pipe leading gas fuel through a cold element within said second local heat transfer condenser . - a gas tank for storing gas fuel, a major portion of which is in liquefied form, - a tank room that constitutes a gastight space enclosing tank connections to and from the tank room and valves associated with them, - a part of a refrigeration or air conditioning circuit reaching into said tank room, and - a first local heat transfer circuit in the tank room , which first local heat transfer circuit is configured to receive heat from said part of the refrigeration or air conditioning circuit in said tank room, - in its first local heat transfer circuit a first local heat transfer re-boiler and a first local heat transfer condenser , and wherein part of a refrigeration or air conditioning circuit constitutes a hot element within said first local heat transfer re-boiler , and arranged to transfer such received heat to liquefied gas fuel handled in the first local heat transfer re-boiler and the first local heat transfer condenser in said fuel storage and distribution system, - a pipe leading gas fuel through a cold element within said first local heat transfer condenser and - a part of an engine cooling circuit reaching into said tank room ; - a second local heat transfer circuit in the tank room , which second local heat transfer circuit comprises a second local heat transfer re-boiler and a second local heat transfer condenser , wherein part of an engine cooling circuit constitutes a hot element within said second local heat transfer re-boiler , and which second local heat transfer circuit is receiving heat from said part of the engine cooling circuit in said tank room and transferring such received heat to liquefied gas fuel handled in the second local heat transfer re-boiler and the second local heat transfer condenser in said fuel storage and distribution system, - a pipe leading gas fuel through a cold element within said second local heat transfer condenser . <EOS>