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Yes, I would put the thermal balancing valve on the return of the primary (store) side. I think the pump could go on either side. I don't think you need anything to sense the temperature on the output of the DHW, it is assumed to be too hot anyway and will be mixed down with a TMV, so it also...

I am thinking about fitting a small (300l) vented thermal store for a 4 bedroom house. I would use a plate exchanger for DHW. I was thinking also to use plate exchangers to connect the existing sealed gas system boiler, and another for the rads with a smartpump and TRVs all around. Does anyone...

Thanks for the links. What I have in mind is almost as you have written, except for #3. The thermal valve would sense the the return from the primary, no need for a remote sensor. Demand on the DHW side would cool the primary side and that is all you need to detect (I think). It would be very...

The reason I thought to skip the switch is because the setup works so well with the Alpha and TRVs on all the rads. When all the TRVs are closed the pump power consumption drops to 4W. Plus it would keep the exchanger warm, meaning quicker hot water. If you wanted to be really posh, you could...

I am not completely sure how the DHW would drop off as the tank cools, as the primary would flow faster and cause more mixing. I was thinking that if the DHW side goes from 10 or 15C in to 5OC out, if the tank normally runs at 60C, I could set the target return temperature for 40C or or maybe...

Thanks again for pointing me to that thread. A user named tsoutwood suggests exactly what I am thinking to do, but they were last seen in 2009. I think also found the valve I am looking for, it is related to the UFH valve. It is called a thermostatic balancing valve, often used to balance a...

You wouldn't need a flow switch because the pump on the primary side of the DHW exchanger would always be on, and thus also always warm.

Thanks for that. They talk about the Gledhill doing something very similar, on page 4 ""Gledhill had the best solution IMHO using a variable speed pump and electronic feedback from the DHW output on the plate. " Instead of electronic feedback with a temperature sensor which requires a special...

I am planning the installation of a thermal store in my house. I am thinking to use a plate exchanger for DHW. One problem compared to an internal coil is that for full output the flow on the store side of the exchanger has to be quite high, which disrupts the stratification of the store. I...

Thank you for your reply. I have not moved yet, but I am just trying to get plans together before I talk to the local building control at the new place, as I may have a small window of opportunity to do some renos before we move in. Originally I was going to get something called a "hygienic...

I am moving and the new house that has tank in the loft for a vented cylinder. I plan to change it to a thermal store, preferably unvented. Since I prefer things DIY, my understanding is that you do not require G3 certification for an unvented store if you use a plate exchanger, but you do if...