Channel Tunnel stays cool and reduces environmental impact on Eurotunnel, after its first season of operating a new cooling system for maintaining requisite temperatures in the landmark Channel Tunnel,  it has saved 4.8 GWh and approximately €500,000, equivalent to saving enough electricity to run 1,000 households. Without round-the-clock cooling, the heat generated by highspeed trains passing through the tunnel under the English Channel would drive indoor temperatures above 35°C, which is the maximum that can be reached while still running services in optimal condition. The new system ensures that ambient temperatures stay at or around 25°C. Visit https://www.getlinkgroup.com. 22/18.