Sorry, ISTR a few weeks or so ago you were talking about the furnace problem and contemplating using biodiesel to run it instead. I'd been reading up on biofuels only a little while earlier, but I was quite low on mental energy at the time, so didn't get around to commenting. You and Mindy mentioning it again reminded me though.
There's at least one site out there (mostly) about biofuels, with quite detailed info on them, but I remember finding one particular page there describing issues of using biodiesel for heating purposes, as opposed to motoring. You might want to read that before going further, if you decide to take that approach. There's quite a lot more on that site, but some of it's hard to find via the normal navigation.
FWIW, it sounds like it's pretty cheap to make depending on how you do it, but at the same time, apparently some of the ingredients and intermediate chemicals are pretty toxic and dangerous (methanol and sodium methoxide). It sounds as though they're manageable, but I don't know much about them myself- I have no personal experience of doing this.
OTish: Heating with biodiesel
There's at least one site out there (mostly) about biofuels, with quite detailed info on them, but I remember finding one particular page there describing issues of using biodiesel for heating purposes, as opposed to motoring. You might want to read that before going further, if you decide to take that approach. There's quite a lot more on that site, but some of it's hard to find via the normal navigation.
FWIW, it sounds like it's pretty cheap to make depending on how you do it, but at the same time, apparently some of the ingredients and intermediate chemicals are pretty toxic and dangerous (methanol and sodium methoxide). It sounds as though they're manageable, but I don't know much about them myself- I have no personal experience of doing this.