I've got an Reillo T50 series oil burner. It seems to run OKay. I didn't have any paraffin, but diesel seems perfectly suitable. My furnace has been running well on charcoal with an air blower, but it's time to make something a bit more consistent; maybe slightly more effortless. So, I figure on opening up the tuyere from 1 inch to 90mm to admit the neck of the burner. I've looked for evidence of folk using central heating burners to heat their furnaces. I've not found many and the few I've seen seem to be focussed on using them to burn waste oil. I'm sceptical about running the burner in such a small space. I know if it was in its natural home in a central heating boiler, it would be equally confined. Is it safe? OKay, I reckon heating aluminium until it melts is inherently unsafe, but... is it PARTICULARLY unsafe? Can anyone steer me to some of OFCH burners used to heat furnaces? Is it a poor approach? can I simply shove the neck of my burner into my furnace and switch it on? Busting to talk to the local expert! Thanks.