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Turn your boiler's flow temperature down
The famous free gas-saver: most combi boilers ship set too hot.
Money & energy
best in autumn,winter
Free
renter-friendly
Your hour
Ten minutes on yours with the Money Saving Boiler Challenge walkthrough — around 60°C works for most homes. Then spend the rest of the hour on your parents' and your neighbour's.
Make it an assist 💚
This one is made for assists: same ten minutes, someone else's gas bill.