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- Anonymous4 years ago
Buy the largest output combi you can reasonably afford. No standing cylinders of hot water to waste heat. No tanks in the loft. No running out of hot water. Plenty of hot water flow with a large combi. Rapid warm up from cold too. A large combi costs no more to run than a small output one as the flame modulates according to demand. Get one with a stainless steel heat exchanger for durability. See link for bewildering choice.
Source(s): https://www.mrcentralheating.co.uk/