However I did some research and found that you can make your own.
So... this got me wondering about it again.
$10.75 A 5lb amount of calcium carbonate... makes mucho gel... perhaps lifetime supply.
$33.88 1Gal 99% Isopropyl Alcohol. (largest I could find on Amazon...)
$4.60 White Vinegar, 1Gal
If the recipe is
.5 a cup of white vinegar
.125 cup of chalk
= .625 cup
This reduces down to about... 60% of volume from water evaporation
.625 cup * .6 = .375
It states we need at least 90% alcohol so we need to add 9 * .375 = 3.375 cups of alcohol.
The final recipe would then be...
.5 a cup of white vinegar (15 cents)
.125 cup of chalk (cost negligible)
3.375 cups of alcohol (cost $1.59) (Edit, I think I made some huge mistake here. At $33.88/gal this would come to $7.14 for 3.375 cups! This means DIY is less cost effective than manufactured... )
Cost wise the chalk is negligible
Obviously the alcohol is the most expensive component here.
From the video in the first link it is stated 2 to 3 hour burn time for this recipe and a total cost of about $1.74/can. I am mostly curious about the BTU's and cost effectiveness of such a solution.
For reference the cans you buy in the stores are roughly $3 / can.
I really do not know what I am talking about here. I did some basic calculations to help spur conversation. I may have made mistakes. The component prices may vary a great deal I did not spend any time finding a SD for anything.
I basically would like to know if this is feasible in cost effectiveness vs gas furnace or how it could be given circumstance.
Thanks for your time.
Edit, I edited above, I miscalculated on the alcohol cost. Further reading shows varying amounts required for alcohol content even as low as 4:1.
So in the end... still looking.