Hi. I've been reading this forum for a while, and figured it'd be a good idea to get an expert view of our situation. We are in PA, just purchased a 3400 sq ft house. Oil heat, it burned 1040 gallons on one zone in a year last year. The 1040 gallons heated about 2600 sq ft. Baseboard water heat. Other zone is electric heat pump (about 800 sq ft). There is a large fireplace in the living room. When I had the chimney repaired, I said 'what about a liner'. The guy said 'is it gas?' I said no. He said, well you don't need a liner. The living room is about 300 sq ft. On one side is the den, the other side is the hallway and dining room. So I think it might be a good idea to get a Harman Accentra for the fireplace, assuming the dimensions are right. My 7 year old has bad seasonal allergies. Allergic to dust mites. Have no idea if he's allergic to burnt pellets. Question 1 Assuming my kid isn't allergic to the burnt pellets, how do I educate myself to set up the thermostats so that I have even heating between the stove and the oil burner? The thermostat for the downstairs where there is oil heat is in the den. Upstairs appears to have its own thermostat, although that might just be for air conditioning, not sure yet. Is this just a trial and error thing? Is there a way to set up the system so that when the stove is on a solenoid keeps certain baseboards from receiving heat? Question 2 Also, any advice about a chimney liner? Am going to get an HVAC guy into the house, but I think the people here are probably more expert, and wanted to check here first. Thanks very much in advance.