Indirect Unvented cylinder, Combi Boiler and Nest Thermostat

[Best]

I am surprised if MIs state just 28 minutes for that cylinder reheat.??? I would have thought it is much more.
The hot water outlet on unvented cylinders I prefer to drop the pipe before ever raising the pipe to a higher level. Just raising a hot outlet will mean some of the stored heat from the cylinder will keep heating the water in the raised pipe, therefore wasting energy.

 

[ShaunCorbs]

I am surprised if MIs state just 28 minutes for that cylinder reheat.??? I would have thought it is much more.
The hot water outlet on unvented cylinders I prefer to drop the pipe before ever raising the pipe to a higher level. Just raising a hot outlet will mean some of the stored heat from the cylinder will keep heating the water in the raised pipe, therefore wasting energy.

20kw going into the coil will re heat in around 30 mins

 

[Best]

20kw going into the coil will re heat in around 30 mins

I am going to check the MIs on Telfords.
I thought they claimed it to be much longer.

 

[Chris1012]

From the Telford user manual

 

[ShaunCorbs]

That's the direct on have a look at the indirect spec

 

[Best]

35 minutes for full reheat, is what I read on 250l indirect.
Not bad, if that's correct.
I have one installed isn't achieving that

 

[ShaunCorbs]

35 minutes for full reheat, is what I read on 250l indirect.
Not bad, if that's correct.
I have one installed isn't achieving that

Size of boiler ?

 

[Chris1012]

That's the direct on have a look at the indirect spec

That was indirect. My cylinder is 250l

 

[Best]

Size of boiler ?

30kw WB gas boiler. It is my partners house, so something I am aware of. Pipework all mine, except the gas, so no bother there.
I need to investigate it more.

 

[Best]

That was indirect. My cylinder is 250l

View attachment 33580

Yes, I got same on searching. 35min from cold to 60 degrees