Can Stove Heat Be Recycled for Home Efficiency?

[Proton Soup]

Hold on a minute here: I think the discussion started with an outdoor cooking device - a grill. Quite obviously, an indoor, unvented cooking device (gas or electric is irrelevant) sends 100% of it's heat into the house. This represents a substantial amount of heat.

yup, if you can't stand the heat, get out of the kitchen

 

[russ_watters]

Now, regarding an electric stove's ability to deliver it's heat to the pan, I suspect the efficiency is above 75%, possibly above 90%. As others have said, conduction is 100% to the pan and represents the vast majority of the heat of the stove. Radiation, due to the reflector plate, is a high fraction (my guess: 75%+). Convection would be considerably lower, certainly below 50%.

 

[OAQfirst]

Eh I'm not too good with words. I did mean a stove - indoor stove. Sorry for the misunderstanding.

 

[russ_watters]

From sears.com, a typical electric range has standard burners of 2500 W (8,500 BTU), gas 9000 BTU. That surprises me - I would think that a gas burner would lose much more due to convection.

 

[russ_watters]

Eh I'm not too good with words. I did mean a stove - indoor stove. Sorry for the misunderstanding.

In that case, the answer's easy: you're already recovering all the heat from cooking and using it to heat your house.