SimpliFire 40" 4-Sided Small Surround with Removable Bottom Piece btu185000 Why is the BTU according

Why is the BTU according to EPA test data smaller than the one advertised

*Note: " Your chosen application is the ONLY application the model can be used due to the modified configuration of the model

Adjust the flame intensity by turning the back burners on for added depth

and stainless steel finishes

Stainless steel bristled brush with long scraper featuring a tough steel blade and an ergonomic handle

SimpliFire 40" 4-Sided Small Surround with Removable Bottom Piece btu185000 Why is the BTU accordingHide any gap between your gas fireplace insert and the existing fireplace opening with a low profile surround composed of steel or cast iron. What's Included 40" 4 Sided Surround Specifications Model SF SI4027 INS30 3 Sided Configuration Dimension W 40" x H 27" 4 Sided Configuration Dimension W 40" x H 30 1 2" Warranty 2 Years Warranty All parts except as covered by Warranty Conditions, Warranty Exclusions, and Warranty Limitations listed Warranty