Below are links to other information that may be of use:
Hearth, Patio & Barbecue Association
U.S. Environmental Protection Agency - List of Certified Wood Stoves
U.S. Environmental Protection Agency - CFR Promulgated Test Methods (TM)
Natural Resources Canada (NRC) - Gas Appliance Energy Efficiency Ratings
Colorado Department of Health – Approved Pellet Stoves and Masonry Heaters
Colorado Department of Health - Regulation No. 4
Commonwealth of Massachusetts - Product Approval Forms
New York City Department of Buildings - Materials and Equipment (MEA)