The Kimberly wood stove is CSA/EPA certified.  In addition, Kimberly is EPA certified for use in Washington State, which has the most stringent emission standards in the United States.Kimberly provides an exceptionally clean burn, emitting 3.2 grams/hour in EPA/CSA testing, as compared 7.5 grams/hour allowed by United States Federal EPA standards, and 4.5 grams/hour allowed by Washington State standards.Katydid is also CSA/EPA certified at 1.9 grams/hour, making it one of the cleanest burning non-catalytic wood stoves on the market today. Katydid exceeds the new tougher EPA standards for the Year 2020 in the United States, one of the few wood stoves at this time to do so.Both Kimberly and Katydid are and tested and approved by OMNI Test Labs in Portland, Oregon to UL Standards.