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GrimUpNorth · 12-03-2021, 13:44

We've got a combi and as Julian says there can be issues with the setup you're looking for. A couple of things we did to try and mitigate issues were to get one with the best domestic hot water flow rate we could as the KW ratings they are labelled with are normally based on the central heating output. We ended up with a Worcester Bosch capable of heating much more than a 3 bedroom detached but it has a decent hot water flow. The other thing we did was to get a thermostatic valve for the shower so when a hot tap is turned on elsewhere then the water doesn't just run cold as the valve adjusts the flow on the cold supply to try and maintain the temperature with the resulting reduced flow on the hot. It's not a perfect solution but it makes the shower more usable.

12-03-2021, 13:44	#5
GrimUpNorth cf.mega poster Join Date: Jan 2008 Location: Up North - Where It's Grim Age: 56 Posts: 2,347	Re: New boiler recommendations We've got a combi and as Julian says there can be issues with the setup you're looking for. A couple of things we did to try and mitigate issues were to get one with the best domestic hot water flow rate we could as the KW ratings they are labelled with are normally based on the central heating output. We ended up with a Worcester Bosch capable of heating much more than a 3 bedroom detached but it has a decent hot water flow. The other thing we did was to get a thermostatic valve for the shower so when a hot tap is turned on elsewhere then the water doesn't just run cold as the valve adjusts the flow on the cold supply to try and maintain the temperature with the resulting reduced flow on the hot. It's not a perfect solution but it makes the shower more usable.