Flower pot heaters have been touted as great source of radiant heat and very simple to make. The design creates incredible heat and are handy in case of a power outage or for winter camping.
The man in the following video uses 2 clay terra cotta pots, a bolt, 2-3 tea candles. The simple design creates incredible heat quite efficiently.
The maker of this video says the heater stays hot for hours and advises caution as the inner chamber can reach up to 500F so please remember – safety first!
Never leave heated pots and candles unattended, especially if there are pets and children in the house and use a safe surface to place the candles and pots on (eg bricks, tray, glass).