Wide range cylinder stat?

[mikrt]

Hello forum,

Can anyone please tell me, is there such a thing as a cylinder stat with a wider than standard temperature range?

I have a bog standard one now which holds temperature to (I guess about) +/- 5 oC from set point. I'd like one that has maybe a 20 oC range, so it comes on at 50 oC and off at 70 oC.

The reason for this is that it calls on my wood pellet boiler to fire too often and I figure this would significantly reduce the start-ups, and 50 oC is ample for my needs.

Thanks in advance.

 

[ShaunCorbs]

You mean your buffer cylinder ?

 

[mikrt]

Main (only) cylinder. The water in it only directly supplies UFH and bathroom towel rails. There is a small heat exchanger on the side which heats the DHW, there is a mixer valve on the tank which reduces it to 50 oC.