Here is a mini pellet stove that you can control over WiFi. The Mr. Heater PS20W-CIW Mini Pellet Stove can heat an area up to 800 sqft. It has a 18lb large capacity hopper and whisper quiet blower. This stove can be turned on/off and adjusted from your phone. It also has a convenient digital control panel.
This stove measures 20 inches wide and 18 inches deep. You can find out more about it here.