Eco-Feu fireplaces and fuel are safe to use indoors and out. While you will not need a chimney because the flames produce no smoke, you should not install a unit in small washrooms or bedrooms. Ethanol fire features emit a minimal smell for a few minutes at the beginning and end of a burn cycle similar to a candle. A room that has proper ventilation is ideal. When your unit is not in use, keep the shutter closed.