Plasticbox has been releasing so many new things for TS3 these day that I wish s/he never stops! Lovely things are these, I can tell.
Here’s a simple, oldfashioned stove – technically it’s a fireplace, but without bells and wistles. Sims can use it like a fireplace, i.e. light a fire and poke it. It costs 480§ in game and is in the Build mode catalogue > Fireplaces.