MrPotts

The manufacturers extol the virtues of being able to micro control heating on a room by room basis, and be able to change temps via an app remotely but is that really necessary? I don’t think it is. THe other issue I was having is with the inaccuracy of the radiator TRV’s, they read too low when heating is off and too high when it’s on. This causes the boiler to fire up unnecessarily or to turn off prematurely. Wiser TRV’s don’t nt read humidity but being so close to the heat source it wouldn’t be accurate anyway.

It seems wasteful when my boiler only modulates down to 7kw and my house heating requirement is 8kw. Think of the amount of boiler cycling for one 500w radiator!

I found that when heating setpoints were set to say 20c if any single radiator trv detected even a slight decrease from setpoint the boiler would fire and keep firing when any of the 11 TRV’s requested it. This is not an efficient way to heat a home IMO.

The Wiser smart trv can request the boiler to fire whereas a manual trv can’t. i found that having individual radiators firing the boiler was very inefficient, I prefer to control the heating for the house as a whole rather than on a room by room basis.

Wiser user here as well. I like the Wiser hub and room thermostat but the Wiser smart TRV’s don’t work very well in my house. I just can’t see how running my gas boiler to service a single radiator can possible be good for boiler efficiency and hence gas usage. I started out with smart TRV’s on all my radiators but am now down to just 3 and they are all controlled by a single room thermostat. The rest of the radiators have manual TRV’s.

Thanks for the info. I dont want to go the diverter kit route as that, I believe, needs a 4 pipe system which I dont have or want. When I spoke to WB about the Easycontrol I was told that it won't give two flow temps on my boiler. I will look into the Nefit option, presumably this will also need the NC heating zone valve to be replaced with a NO zone valve.

This sounds interesting, I have been looking at ways to reconfigure my Greenstar 24i to do PDHW. I can reconfigure my existing s plan but I can't see a way to get the boiler to do two flow temperatures.

We have softened water routed to all taps except the kitchen cold water tap, the outside tap and the fill valve for the heating system.