In the wake of Cherry Wood project week 18-10-15
We were using this system in our scout group when I was 11. I am sure it will still work!
In those days we used Alter fires – just a fire at waist height, built from logs, corrugated iron top with brick sides and metal bars over. All had water systems build at the end – I cannot remember running out of hot water.
We also had trench fires with roasting ovens built over them with chimneys. Not to mention dining shelters, hay boxes for cooking breakfast the night before.