I'm new to wood burning and have a fireplace that I would like to put an insert in. I'd like something that could potentially heat the whole house (1900 sq ft), low maintenance, and looks good. I was hoping the 2 story room that the fireplace is in would help let warm air rise to the 2nd floor and the cooler air would fall back down. Are there inserts that have thermostats that can vary fan speed to keep temperature steady? How about tying the system into the existing thermostat and using the aux heat controls to adjust fan speed and also run the central air blower to circulate air to every room? My budget isn't limitless but I do prefer value over price.