....a big wind storm turned the 600w space heater toward my oak cabinet doors when I was out shopping for groceries and one door got a good scorching. Sanded out but gave me a start. A fireman (at the time) hates to have his boat burn down 'cuz he was foolish..
Underway and at anchor and sometimes at the dock I used a small wood stove built to my needs by a local welder. Axed presto logs into varying thicknesses of wafers, three in a pyramid in the stove, BBQ lighter fluid dowsing, match, voila'! Could gauge how long the fire would last by the wafer thicknesses.