If you can lay your hand on one of these
ALADDIN BLUE FLAME HEATER OPERATING INSTRUCTIONS
either eBay or locally, they're so much better than the heaters available today, and very easy to service and maintain, even if you pick one up that's been neglected. They also have a removable top plate so you can boil a kettle or fry eggs and bacon on an allotment.
As long as you scrupulously follow the instructions and keep the wick trimmed and the flame blue, you only ever get a smell when lighting or extinguishing and it's a great source of CO2 for your greenery
