Cold water is denser and makes more efficient use of the energy needed to heat it. Take 2 identical containers, fill one with cool tap water and the other with warm water and see which boils faster. Only way to really settle the argument. How you explained it Kevin is to use one form of energy to start the process and use a different source of energy to complete the process. No matter how you look at it, you are using energy. Pick the one that costs the least amount of money. PS: Guys never win an argument with their wives, it will cost you later down the road.
You did not “win” this argument.
How efficient is shopping for propane?
The Game of Therms. You win Kevin but ONLY in a footnote.
Cold water is denser and makes more efficient use of the energy needed to heat it. Take 2 identical containers, fill one with cool tap water and the other with warm water and see which boils faster. Only way to really settle the argument. How you explained it Kevin is to use one form of energy to start the process and use a different source of energy to complete the process. No matter how you look at it, you are using energy. Pick the one that costs the least amount of money. PS: Guys never win an argument with their wives, it will cost you later down the road.