Just upgraded my boiler - can't believe the difference

Yeah, upgrading helps, but honestly, I didn't see a huge drop in my bills. Maybe my old boiler wasn't as prehistoric as yours, lol. Still, the quieter operation alone was worth it... no more midnight clanking waking me up.

Which felt like the bigger change for you: lower bills or a warmer-feeling home, even though you’re using the heating less? Cloudguitarist said the quieter operation alone was worth it for them.

I’d give the warmer-feeling home more weight: comfort is something you notice every day, even if the bill savings turn out to be modest. Lower bills would still be a welcome bonus, but using less heat and feeling more comfortable sounds like the bigger overall improvement to me.

Would a quieter boiler come close to the comfort improvement in your priorities, or would feeling warmer still matter more?

Feeling warmer would still come first for me, but quiet could come surprisingly close if the old boiler’s clanking was disruptive - especially at night. If it was only occasional background noise, I’d treat quieter running as a nice extra rather than an equal comfort gain.

For anyone comparing bills after a boiler upgrade, were the billing periods comparable, or were you using the heating less too? That comparison might help separate the boiler’s effect from the change in how much heat you needed.

Similar-length billing periods would make the comparison more useful, but I’d also note whether heating use changed. A lower bill while using less heat is encouraging; feeling warmer at the same time makes the upgrade look worthwhile even if it’s hard to pin down how much of the saving came from the boiler itself.

If the bills had stayed about the same, would the warmer, more comfortable home still make the upgrade worthwhile to you?

Probably, if the warmer, more comfortable home were a substantial improvement. I’d be less enthusiastic about the upgrade if the bills stayed unchanged, but comfort you notice every day has real value too. The savings would make it feel like a clearer win, rather than the only thing that could make it worthwhile.