this is the second time in two days I've run across that. And our first cold front of "winter" is coming in tonight. I think i need to get to the hardware store....
it works on the soapstone hearth theory (mass), and with three pots, that could be a decent small room radiant heat source.
This will heat approximately fuck all, a small radiator is rated > 2000 btu, by his own admission this is going to be putting out about 50 btu, so it's orders of magnitude less effective at heating your room, but that doesn't eliminate the fact that the heat from the candle was going to enter the room anyway. This guy has either invested nothing or is a charlatan.
open the blinds and use natural light , i know most would not do this an eletric banket , get lots of blankets , clean the filter every season , check seals on windows and doors , close rooms off that are not in use and shut the heating ducked dont seal this off just close it . plastic window thing , when done with oven open the oven door and let the heat vent out , this is going to sound silly but sleep out in the common space that connects to the kitchen the heat will help and this way u dont waste heat , on warm days open the windows and vent place out even in winter this will help with freshness and help to keep air from getting dry and stagnate . just some things i know growing up in the midwest and around the country . oh and stay active , this helps blood flow and this way u dont need the heat on during the day that much , keep the heat on at set temp turning it on and off actully raises the bill being that it has to heat up more instead of keeping said temp , when it is turned off u basically reset the amount of time it takess to warm up the air it intakes to put back out into the space . i think that is all peace