There is central vents in every room except the den.
The den has an electric wall heat/air unit. It has a little pull out filter that can be rinsed off and
placed back inside the unit.
The den also has a gas fireplace but I rarely use it.
My tv cabinet in the den has an electric log fireplace in it but I never use it either. It's more for
looks actually but it does blow heat out well.
I do keep the vents closed in the dinning room but heat and air still comes thru. Closing vents
does not block the heat and air 100%. I have a door to that room and I keep it closed. I mainly
keep it closed because of Bo. He does not like to take a bath. At bath time he would run and
hide under the china cabinets, table, or futon that is in there. So I just keep it closed. At bath
time, I do have to go around the house and close the doors to the bedroom and other bathroom
because he will run and hide the beds or some where else. I have a yard stick that I shoo him
out with but it's a lot easier to close the doors.