Brian X Xxxxxxxxx · Xxxxxxx, Ontario
Neat idea to use a flower pot as a dissipator/regulator for the heat, but the idea of using this as a heat source (apart from emergencies) is just silly.
A tea light contains about 550kJ of energy. The IKEA Canada website indicates that 100 "GLIMMA" tea lights cost $4.51 after tax. The whole pack of 100 will have 55MJ of energy. This equates to 12.2MJ per dollar.
Now let's look at a more conventional heating mechanism: home heating oil. One litre of home heating oil contains 36MJ and at current Canadian market rates costs about $1.20. This equates to 30MJ per dollar.
Now that we've addressed the silly implied claim of cost-effectiveness, let's move on to the equally silly claim of sustainability, shall we?
Please note that paraffin (candle) wax is a petroleum product just like gasoline, diesel, home heating oil, jet fuel, etc.
Perhaps if the author wasn't using normal candles, but in fact kept a very large number of beehives on his boat, he could be harvesting the bees' wax. This might be construed as sustainable, but before we jump to that conclusion, let's run a few more numbers.
According to Statistics Canada, a single person's dwelling consumes about 70GJ per year. Let's assume in Canada that half is for heating. Let's assume again that this boat-dweller is extra thrifty with energy and uses only half again as much for heating. This is about 18GJ required for heating his floating abode. I'll be generous and not account for the extra heating costs in an exposed marine environment.
Since this "true activist" is using making "sustainable" choices, we must assume he's harvesting bees' wax from the hives on board his vessel.
Since bees' wax has about 44kJ per gram, he will need to harvest 410kg of bees' wax per year to keep himself warm.
According to my recent reading, the annual harvest per hive is about 22lbs of honey and about 1lb of wax after rendering. Dropping our archaic units and redundant data, we're looking at about 500g of wax per hive.
The author above (and presumed role model) must then be tending 800+ hives in order to archive this much-vaunted sustainability.
While that sounds very nice, I think there's a very good reason why this is not a wide-spread home heating practice.