How Much Wood do you Burn in a Week of cold Weather?

[GarethM]

I dunno, £11 a day for a toasty home and he's probably walking around in socks and his tightly whities.

[Big J]

21 minutes ago, sandspider said:

 30kwh per day is huge! Was the Devon house even worse? We use about a 3rd of that, in a big, old, cold stone house in a dark Welsh valley

 

I think you misunderstand.

 

30 kwh is the total electricity usage for everything. That's 98% of our heating too. Our house is about 240 square metres.

[Big J]

13 minutes ago, GarethM said:

I dunno, £11 a day for a toasty home and he's probably walking around in socks and his tightly whities.

 

I think it'll be about £175-200 for the month. Not certain as the tariffs are rolling.

[GarethM]

It'll be cheaper than here as Sweden uses a lot of nuclear and hydro I think.

 

Mine is something mental like 35 or 38p a kwh as I'm out of town.

[Big J]

Just now, GarethM said:

It'll be cheaper than here as Sweden uses a lot of nuclear and hydro I think.

 

Mine is something mental like 35 or 38p a kwh as I'm out of town.

 

It averaged £0.215 on the bill for October, but it might be a bit lower this month. We aren't on a great tariff as we bought our house just as everything kicked off in Ukraine with the subsequent energy crisis.

 

The south of Sweden doesn't have much hydro and is more reliant on gas and to a lesser extent nuclear. 

 

Either way, it's probably one of the cheapest countries for electricity right now. Or least expensive, depending on which way you look at it!

[sandspider]

8 minutes ago, Big J said:

 

I think you misunderstand.

 

30 kwh is the total electricity usage for everything. That's 98% of our heating too. Our house is about 240 square metres.

I understand. Just seems very high for a well insulated modern house with eco friendly air source heat pump. (Though to be fair, I've not worked out how many kWh of logs and oil we get through per day).

 

Glad we don't heat with electricity, that would cost £450 odd per month here. 

[GarethM]

Wasn't sure they bought it off the Norwegians 🙂

[Big J]

4 minutes ago, sandspider said:

I understand. Just seems very high for a well insulated modern house with eco friendly air source heat pump. (Though to be fair, I've not worked out how many kWh of logs and oil we get through per day).

 

Glad we don't heat with electricity, that would cost £450 odd per month here. 

 

I reckon you're seriously underestimating the kwh in your logs and oil....

 

1kg of 20% MC wood contains 4 kwh of energy, of which 3.2 - 3.5 kwh will be emitted to the room/heating system (assuming 80-88% efficiency). 

 

So, I reckon that our two heat pumps are using 20 kwh (the rest is hot water, dishwasher, washing machine, general house stuff) a day at the moment (at an average external temp of 0c, which would be considered a cold snap in the UK) which is roughly equivalent to 6kg of logs. 

 

I regard that as extraordinarily efficient. 

 

Similarly, 20 kwh is 2 litres of heating oil, though our heat pumps have a COP of around 4, so we're actually getting about 80 kwh to the house, which is equivalent to 8 litres. 

[Big J]

7 minutes ago, GarethM said:

Wasn't sure they bought it off the Norwegians 🙂

 

I am not sure. There is a lot of hydro production in the north of Sweden, and it's generally cheaper up there.

[sandspider]

26 minutes ago, Big J said:

 

I reckon you're seriously underestimating the kwh in your logs and oil....

 

1kg of 20% MC wood contains 4 kwh of energy, of which 3.2 - 3.5 kwh will be emitted to the room/heating system (assuming 80-88% efficiency). 

 

So, I reckon that our two heat pumps are using 20 kwh (the rest is hot water, dishwasher, washing machine, general house stuff) a day at the moment (at an average external temp of 0c, which would be considered a cold snap in the UK) which is roughly equivalent to 6kg of logs. 

 

I regard that as extraordinarily efficient. 

 

Similarly, 20 kwh is 2 litres of heating oil, though our heat pumps have a COP of around 4, so we're actually getting about 80 kwh to the house, which is equivalent to 8 litres. 

 

Ah. You may be right there. In that case I don't want to work out what our total energy consumption is per day, it'll be terrifying. And our house isn't even that warm!