I've just received my annual gas usage statement. It came as a surprise to me that I'm using almost the average gas consumption in the UK. The average is 16,500kWh and I used 15,000kWh over the year.
The reason this comes as a surprise is because I rarely use the gas central heating. The reason for this is simply because it's expensive (we have a process: clothing, more clothing, thicker clothing, blanket(s), THEN heating). I find it hard to believe that I'm using nearly average when all I'm using my gas boiler for is hot water. There are two of us (my wife and I). We both wash on a morning and evening. We wash the pots regularly. We shower more often than bath so we don't use an unusual amount of hot water.
Being concerned about the cost of gas given my apparent usage, I started to wonder if I'd sprang a leak. I believe disproved this by taking notes of my meter reading before going to bed one evening and after getting up the next morning. During this period of time, we did not use the boiler. The result was good, no gas usage.
I did another exercise to see how much gas my boiler is actually using so I ran the heating for 2 hours and it came out at 3m3. Using a rough calculation of multiplied by 11 and a rough cost of 5p per kWh, it cost me approximately £1.65 to run the heating for two hours.
Although there was no need for blankets that night, I can't help but think this is high consumptions. My boiler is quite old and I expect it has a poor energy rating (probably an E but I don't really know what that means).
So my questions are:
- How much gas (m3) would an A rated boiler typically use in a two hour period to run the heating?
- How much does an A rated boiler cost (fitted), and would I likely see a saving in the short to medium term?
Average figures are fine as I appreciate there are probably a lot of variables here (e.g. temperature, pressure, number of radiators, etc).