I have a 200 sq ft room that sticks out of the back of my house. It is on a slab and is a heat sucker. I refuse to use my baseboard heat in there! I installed a Castle Serenity stove a few years back and it works great but it is oversized and even on low I have to keep shutting it down. The heat does not circulate into the rest of the house, even with fans which are annoyingly loud! The Castle has a thermostat but does not turn off and on itself. Any suggestions for a pellet stove for this small of a space?