by oldclaypaws » Mon Apr 14, 2014 11:56 am
I don't know if you've seen a 2000 litre tank, perhaps you have a large house, but that sounds pretty huge to me. Our oil tank is 1000 litres which would heat the house for a year (but is hardly used due to free wood), and I've a 1200 litre propane tank for firing pots (hopefully to be superseded by wood at some point). 2000 litres is 2 cu metres, eg takes up 6'6 x 3'3 x 3'3, the size of some domestic downstairs cloakrooms.
The disadvantage of wood pellet boilers and some wood hotwater systems is if you have a modest house as we do, there simply isn't the physical space available. We also face roughly North, so unfortunately solar panels aren't an option. We do get virtually all of our heating from the one logburner, and sell some fire wood, so even though we get an occasional small amount of oil for me to have a bath and have to pay for electric, our annual domestic energy bill is as follows (we're not connected to gas). I think its about 1/3rd of the average.
Lecky £40/ month = £480 /annum
Heat; Oil £300 less Wood sales (£300) = zero
Total net energy costs £480.
With quite a lot of thinning and clearing to do in future years, if I can sell more wood, we should have several years breaking even.
I did work out that if we felled all our oaks and used them for our own fuel, they'd last us around 300 years (!), by which time they'd have regrown twice over, in other words we are always going to have a surplus and can afford to leave a good portion as deadwood rather than harvesting every scrap for fuel.