How to guarantee maximum condensing?

[BigBurner]

Boilers, condensing, even with stainless HE, still have shorter lives than the old cast iron non-condensers.

Quality condensing boilers last. Unless you are in the cheap end of the market.

 

[D_Hailsham]

Two years ago we moved to a smaller modern house, also with stat in the hall and TRVs. The same thing occurred: to cold - turn the stat up; too hot - turn it down again. As the programmer was on its way out, I decided to invest in a Honeywell CM67 Wireless Optimizing Programmer.

Since then there has been no complaints about being too hot or too cold. .

Is that down to how the stat functions or the wife not knowing how to turn it up yet.

Definitely due to the stat. The wife knows how to use the stat; she just does not fiddle with it any more.