Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
The manufacturer of the stove must provide certification that the product tests for at least a 75% efficiency rating using the lower heating value, i.e., the heat value of a combustion process assuming that none of the water vapor resulting from the process is condensed out, so that its latent heat is not available.
