Can any one offer any advice? This question was asked on a non arb related forum.
Having just paid 49p per litre for heating oil (32p last September and 22p the time before that) I am getting brassed off being beholden to oil companies especially as oil my be 60p this autumn.
I am thinking about a boiler to burn either Bio mass or wood pellets to run our centeral heating at home. The oil boiler is about U/S anyway. Bio mass is anything, wood, wood pellets, Mischanthus grass, wood chip, wheat, barley etc etc
Does anyone have any experiance of these boilers, looking at about 32KW capacity. Cost wise pellets are about £170 a ton, this equates energy wise to 34p per litre for oil. Wood chips are way below that but would need bulk storage and handling, not a lot of energy per ton and lots more ash. Boilers start at about 5K but a remote boiler in a shed (or container) with integral bulk fuel supply would be 15 or 16K plus instalation costs. These would be considerable as underground pipework is needed under a tarmac drive.
Now I can source as much free dry sawdust as I want, so I could maybe make my own pellets but again a large capital investment as it is apparantly not as simple as some would make it look. A mobile pellet making set up on a trailer is around 20K, makes around 600kg an hour. I have seen a little Ameriacn machine for 2K but that is just the pelleter. Or I could maybe hire some time at a miscanthus grass pelleting site locally, or buy Miscanthus grass pelleted at 120 a ton or so from them in big bags but some boilers dont like Miscanthus residue. Add machinery costs to the boiler costs and the savings on 4,000 litres of oil a year (say 2k at present) dont really stack up.
Dont have gas, they wont install it, to far (300 yards) from the end of the existing main. Ground heat pumps are about the same running costs as oil in cost per KW.
I am sure wood is the fuel of the next 20 years and the idea of free fuel is appealing, at present there is a small grant providing you jump through a few green hoops. For buisnesses there is 100% writedown against tax in year one so great but private houses it is £1500 max.
Anybody and thoughts and experiance?.
Thanks