Place heat-proof mat or tile where you want heater located.
Beginning with your larger pot, insert the threated bar with one bolt and washer (or threated bolt without a bolt and washer) through the hole in the bottom with the threaded part of the bolt sticking out inside the pot.
Place a washer on the bolt inside the pot then secure with a nut.
Place another nut on top of this washer. Hand tighten until snug. This will create a gap between the pots and hold a volume of heated air, increasing efficiency.
Top the stack with another washer.
Place your smaller pot inside the first one, threading the bolt through the hole in the bottom as before.
Place last washer on threads inside smaller pot, and then fasten with nut finger tight only. You only want the whole assembly to be snug enough to handle and move without it falling apart but do not over tighten or pots will crack or shatter.
Set up smaller flower pots or bricks in position, spaced to support rim of largest pot when upside down.
Place candle or candles inside metal can or other container and position between bricks or flower pots.
Light candles and then position heater assembly above candles resting on bricks or small flower pots.
