CSA/UL certification ensures long time services and user's safety,can be sold in the U.S. and Canadian markets Double safety protection device, one is overheat protection device, automatically cut off when thetemperature is too high, the other one is fuse 1500W heat/ 5000 BTU's per hour provides supplemental heat up to 400 Sq. ft. to help you save money Easy Fit:Logset designed for most existing fireplace openings, steady flat bottom on any flat floor and just plug into any standard 120V outlet Can enjoy the flame effect without heat.Realistic flame effect with 4 adjustable brightness settings Timing function can set the time from 1 to 9 hours,don't worry about forgetting switching off this room heater or fire risk. 11 temperature settings ,64F to 82F,ON meas heater keep working No installation:The heater is ready to use upon arrival; just attach remove from the box and plug it in.