Don't know technical things... It's set to max on the boiler for CH and about 3/4 for the hot water. The old one was max for both, but struggled to get the heat up to the top floor, then was breaking a few times for different reasons, so we got the new one then.
We put the valves on whatever...
10 year old Worcester 350 went out.
Worcester 37cdi went in.
I expected slightly higher bills due to it heating the house better especially the top floor (just two bedrooms, and they were ok previously just took a long time to heat).... Just not triple?!
I could imagine keeping the house hotter could increase it by say 50% maybe even double, but over 3 times the usage?
The system has a timed thermostat now too which it never did.
We have an old 5 bed semi detached.
Prior to Feb 2012 we were using average 200 units of gas a month.
Since Feb 2012 we have used average 650 units gas a month.
We had a bigger combi boiler installed, which heats the two top bedrooms better.
We have had the house slightly hotter in the...