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“When installing a new boiler or water heating, make sure it’s as close to the kitchen and bathroom as possible, so that the water doesn’t have to travel through miles of pipework, losing heat on the way.”

https://www.ovoenergy.com/guides/energy-guides/120-ways-to-save-energy.html?fbclid=IwAR1wQh1FPGcj1n_MkLYySqEDAnP8vMEcVQr_RL0sM8HWblsTeXH7j2WWfdw