Originally posted by: Ramma2
I looked up the specs for the electric GE Profile DPSB620EC and its evil gas-heated twin, the DPSB620GC. The E has a 5,600 Watt heating element. The G uses a 22,000 BTU/hour heating element. A standard power connection is needed to turn the drum. It appears to be a 1/3 horsepower motor drawing approximately 6 Amps at 120 Volts. That being said, we're going to simplify life by ignoring the drum motor and assuming each dryer dries equally. Waving my hands, I calculate the per-load cost as:
Electric dryer: 5,600 w/hr * 0.06872 = $0.384832 per load
(If we used the lower rate, it's only $0.289447 per load)
Gas dryer: 22,000 BTU * 1 therm / 100,000 BTU * $0.98655/therm = $0.217041 per load.
Based on this, gas is cheaper to operate. Now, let's figure out what the breakeven is. The cost difference is universally $50 for gas versus electric. (I think this is mostly marketing, the same way as premium unleaded is always $0.20/gallon more than regular unleaded.) The cost difference per load is: $0.384832 - $0.217041 = $0.168/load.
ConclusionThe number of loads we need to do to break even (save $50) is:
($50 + sales tax) / $0.168/load =
($50 + $4.3) / $0.168/load = 323 loads
In an average week, we do eight loads of clothes. A gas dryer would pay for itself in about ten months. Since the average lifetime of a dryer is at least five years, conventional wisdom is seems correct
*Taken from another site