New installation design

[Richard Owen]

I'm struggling to work out why you'd want such hot water at the kitchen sink?

I've got a Navitron/Newark thermal store with DHW loop. I have the tmv set to 60c. This is because the thermostatic mixer valves on the showers don't like to have cooler water. They like to do their own mixing. For everything other than the showers, I have a second tmv that mixes the water down to about 44c. It feeds the bath and all the hot taps.

It allows rapid bath and washing up sink filling without the risk of either scalding or having to mix hot and cold to get the right temperature. The bath needs a little cold, the sink none.

It's safe and convenient.

[Midnight Lightning]

Thanks Wookey, I'll take a look at that, although my concern on the pipe run was more to do with heat loss that pressure (If pressure is an issue I have the option of wider pipes - but yet more heat loss)

I supose I'm thinking nore of marginal weather where the pump is turning on and off frequently, with long pipe runs the water might be hot enough at the panel but my concern is that the cold standing water in the pipes might cool the tank more than the hor water raises the temperature when it finally arrives. Perhaps this could be mitigated by a higher delta T?

Mid

[wookey]

Exactly - smaller pipes is better for heat loss; no argument there. So the only question is whether your pump is up to the job of pushing water round the pipe size you have chosen fast enough for the heat you need to shift.