So after 4 years of burning wood with a jotul Oslo I have decided to go the pellet route. I purchased a used Enviro Winsor pellet stove in great condition. I have a fireplace with a 6" ss liner approx 18' that went to the stove. I purchased the adapters to reduce to 3" and used 2' double wall pellet with t to the stove. For three days I have run the stove on low. During this time I have been getting headaches. When I shut the stove down the headache goes away. My wife and kids r fine and no complaints. The room and entire home are full of CO detectors and none have gone off. Is it me? Is it possible that I am just allergic to these damn pellet stoves? The burning of wood has never bothered me. Or could the stove be bad? Fortunately I have held onto the jotul just in case. Any advice would be greatly appreciated