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Old 02-12-2008, 12:27 PM   #47
Undertoad
Radical Centrist
 
Join Date: Jan 2001
Location: Cottage of Prussia
Posts: 31,423
Candles are an interesting light source, what with all the natural flickering. And they light a bedroom nicely, with just the right amount of dim yellow to see your way around. But it turns out that if you have three big cheap candles burning overnight for several months, a light layer of soot will coat everything, without you noticing.

But more importantly, the soot will be drawn down to your furnace, where it will coat the dust filter so perfectly that the furnace will slowly lose the ability to move enough air to heat the house. The furnace will then run overtime, causing you to pay huge amounts in electricity (or whatever) to heat nothing in particular.

It will most evident that something is wrong when the outdoor air temperature goes down to 5 F overnight, so that you wake up freezing.
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