The U.S. Environmental Protection Agency (EPA) requires manufacturers of wood stoves to produce clean-burning wood stoves. New wood stoves (those built after July 1, 1988) cannot produce smoke-related pollutants beyond certain limits. New wood stoves must be affixed with the following two labels:
A temporary label with information on the compliance status of the model, the particulate matter emission rate, overall thermal efficiency, heat output range, and possibly the overall efficiency of the model.
A permanent label with the month and year the wood stove was manufactured, model name or number, and serial number. If the wood stove is equipped with catalytic combustors, the permanent label also should indicate the catalytic combustor's inspection and maintenance needs. If you own a wood stove, do not remove this label. If you are looking to purchase a wood stove, check to make sure this label has not been removed.