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Is that by boiler setting or change to pipework? Right now, my boiler does both under the one setting. If I press the water button on the boiler I just get dashes, plumber who commissioned it confirmed it’s running both ch & hw under one temp setting. I guess demand is created by any of three...

Yeah it does seem that is the issue. It’s a pain because the hallway, being a cold zone compared to other rooms due to stairs and front door, does tend to be on when others are at temp. Thanks for your input.

Thats the biggest issue yes. The larger zone made of 3 loops is big enough to have return water cool the flow. But just the 55m loop sends the temp to over 55, and the other loop jumps to around 40/45. So the smaller two are both a issue but the small one more so. I was hoping a more robust...

The blending valve is on minimum, cranked as far closed as possible. When all loops are running, it’s 30deg, when just one, it flies up to 55deg when the boiler is at 65deg flow, if I have the boiler it jumps even more. When all loops are open and it’s running, 30deg flow is ok, return about...

It’s a Greenstar 4000, 30kw. System boiler condensing. Installed around 2 years ago so new yes. Just another thing, flow and return are always bang on, 7deg drop. So on all loops, a drop of around 7, and on the full manifold, a drop of around 7 from the flow gauge to the return gauge. Even...

Modulating valve, that’s it :) Yes, the flow pipe is coming down and about 55deg on the copper before it enters the blending pipes and going into the hot side of the valve. It follows the arrows on the fittings.

Sorry, probably wrong terminology. Plumber told me, I may have misunderstood him a bit. The boiler reduces if the demand from the system drops, I.e if some rads switched off. I think that’s what it does. The app flame drops from full (red) to a smaller flame (orange).

Hi all. I have a recent renovation install of an ufh systems in my downstairs, with rads & towel rails upstairs. My boiler is a Worcester Bosch Greenstar 30kw system boiler connected also to a hot water tank. The boiler has a self regulating valve to reduce the heat flow temp when required...