All heaters manufactured by SBI are certified as per the latest CSA (Canadian Standard Association) and UL / ULC standards (Uderwriters Laboratories / Underwriters Laboratories of Canada). Model Hunter is the only exception since it is strictly designed for recreational purposes. 

An independant laboratory is responsible for testing each model as per the applicable standards. Warnock Hersey and Omni Test Laboratories (OTL) are the independant labs most frequently used and their name generally appears on the certification label attached to the side or back of each heater. 

All heaters sold in the USA meet the latest emissions standards required by the EPA (Environmental Protection Agency).  Each EPA-certified heater has been tested for emissions by an independant laboratory.