I have a Woodchuck 2900 indoor furnace that I started using regularly this winter. It heats the house well, but I'm wondering if my chimney is pulling too much of a draft. I have two sections of black pipe with two elbows connecting the furnace to the chimney, and about 30' of 8" insulated pipe outside. I also have a thermometer mounted on the black pipe right next to the elbow thats connected to the flue. With a good, hot fire it usually runs in the 300-350 degree range.
Here's my concern: I've noticed many times when I have a fire going, there is so much draft suction it will actually spin the wheel on the draft blower, even though there is no power to it. Also, when I have a good fire the furnace blower runs constantly...sometimes for two hours straight. I keep my thermostat set at 68 but its got as warm as 75 in here. It seems that even without the draft blower running that its still sucking too much air, causing the fire to burn hotter than it needs to. But, my flue temperature appears to be in the normal range so its not like my fire is burning too hot. I have a manual damper on the black pipe but I haven't tried shutting it down yet.
Any thoughts?
Here's my concern: I've noticed many times when I have a fire going, there is so much draft suction it will actually spin the wheel on the draft blower, even though there is no power to it. Also, when I have a good fire the furnace blower runs constantly...sometimes for two hours straight. I keep my thermostat set at 68 but its got as warm as 75 in here. It seems that even without the draft blower running that its still sucking too much air, causing the fire to burn hotter than it needs to. But, my flue temperature appears to be in the normal range so its not like my fire is burning too hot. I have a manual damper on the black pipe but I haven't tried shutting it down yet.
Any thoughts?