You don't say what size the house is, or indicate how well insulated it is. Those will play a very significant role here.
Did you get a BER at the time of buying the current house? That should have given some rough guidance on expected heating costs. You can see some example estimates here for various building types and efficiency ratings here. Note those estimates are based on 'typical occupancy', they don't state what that is anywhere, but I'm guessing that doesn't assume constant occupancy which will result in higher heating & lighting costs.
If you don't have a BER for your property, but your house is typical of an area, look up similar houses that have been on sale of the last while. The online ads should include the BER ratings.
The size of the house will have a direct bearing on the boiler model. If you only want to work out an hourly rate, just look at the rating of your boiler. That'll tell you the maximum energy consumption, then just calculate with whatever rate you pay for gas. Typical boilers would be in the 18-35kWh range.
But that alone won't give you the full picture, as factors such as the starting temperature and how thermally efficient the building is will have an impact on the boilers cycle time. When the water returning to the boiler hits a certain tem (how much of the time the burner is running while the heating is on).
A middle of the road 25kWh boiler could cost around €1.30 to run for a hour assuming it burns for the full hour and you're on a discounted rate of 5.2c/kWh.
The extension is unlikely to be A-rated. To build to that level without addressing the rest of the house would have little overall effect on energy efficiency as a whole while costing a lot more to build.
Im not sure how relevant it is regarding size of house ber rating etc. the question is how much is heating costinng per hour of use. This is going to be the same regradless of how insulated the house is or how many windows are open. Of course those factors would certainly determine the amount of hours you might need your heating on but they arent relevant to cost of usage per unit of time.
Its very relevant.
If you put the boiler on for an hour and the temp is set at to 70C, the boiler doesnt stay on for an hour, it switches on until the system is at 70c and then switches off and then goes back on when the temp drops to approx 68C and switches on and off enough to keep the system at approx 70C.
If the house is badly insulated or the doors are open, the rads will cool down quicker and the boiler will have to do more work and use more energy to keep the system at 70C.
I would consider €300 for two months in winter for a house of that size which is occupied during the day to be fairly normal.
The best way to lower this is to only heat the rads that are required during the day and turn on the rest of the rads when required ( Dont baulk at the 3/4 minutes this takes each day, this is the sort of manual zoning my mother did every day of the winter for decades).
Yes its relevant if your heating is such that it can be set to a temperature. Then its 100% relevant for obvious reasons...if windows are left open heating will stay on longer to reach desird temperature etc.
I was referring to a heating system that you just switch on for a set period as opposed to for a set temperature.
Yes its relevant if your heating is such that it can be set to a temperature.
When I switch on the boiler for an hour, it seems to run for the full period. No shut-downs that I can hear.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?