Running Water heater on Gas vs. Electric
Hi all, I was just wondering given the opportunity to run your heaters on AC vs. LP what do most choose? Is gas still cheaper in RVs? I know in homes with standard 50 Gallon heaters it is. When I m...
Forum Discussion
doughere wrote:to be 75%.
Electric:
Assuming you meant $0.124 dollars per KWH!
$1.00 buys 8016 KW (100 / 12.4); 8016 watts * 3.41 BTU per watt = 27419 BTU per dollar.
Propane:
$1.00 buys .23 gal of propane (7.1 gal in 30 lb. tank / $30.00 per tank); .23 gal * 95000 Btu per gal of propane * .75 (guess of efficiency) = 16862 BTU per dollar.
In your case propane is significantly more expensive than electric. Where I am, last tank I refilled was about $20 for 30 lbs. just about a wash between the two for me.
Doug
The math and logic are right on. You guess the efficiency of propane to be 75%. Most propane heating appliances are about 80%, but that's just a guess too. 75% is good enough for government work.
Good work!
Wil
