Stove Efficiency

marvin · Post by **marvin** » Thu. Jun. 19, 2008 4:53 pm

Is there a way of determining the efficiency of your coal stove? My dealer website has no information but when using the fuel calculator in the link below, it is asking for the efficiency of the stove. The site suggests that a coal stoker is 70%-85% efficient but I was trying to get a bit more exact.
https://www.hearth.com/econtent/index.php/article ... alculator/
Thanks.

LsFarm · Post by **LsFarm** » Fri. Jun. 20, 2008 3:51 am

There are many efficiencies.. there is how efficient the coal is burnt, there is how efficient the stove body picks up the heat and transfers it to the room, and there is how efficient the heat is moved around the house...

I'm afraid you will have to use a 'ballpark' number of ~75-80%... Unless someone has some good specific numbers for your stove..

Greg L

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Yanche · Post by **Yanche** » Fri. Jun. 20, 2008 10:13 am

marvin wrote:Is there a way of determining the efficiency of your coal stove?

Yes. BTU content of the input fuel (coal) reduced by the losses, heat out the stove pipe and ashes. The rest gets to heat the air. You need a testing lab to make the measurements. Since it's not a labeling requirement for sale, it's rarely done. Even if a manufacture knows he's not going to tell you. It's usually so low compared to other heating appliances if would drive customers away. Even at the relative low efficiency it's more economical than other ways to heat your home. That's what most care about.