paraffin heater

looking for a cheap safe paraffin heater bout one 0.5 tank capacity had it on for a few dayd it burst into flames the wich holder wedges in tank by a plastic gromit this had burnt due to some reason googled it somebody else had the same problem have seen a few single burners on facebook market place but nobody will post, so i have seen this
lhttps://www.ebay.co.uk/itm/375906464195 anybody else have one and are they any good plz

 

Never tried them, but Parasene is a fairly well known make.

I dont think you will get much heat from it if used in a greenhouse, have you seen the price of paraffin.