We installed a brand new 30NC wood stove. Wondering why the stove isn’t heating the home. The stove is installed in the basement with a flex liner up the chimney. The chimney length is 20ft with a 3 ft horizontal run. I have a good draft , wood burns clean. I can only get the stove to 500 degrees, when I turn on the fan on the stove the temperature drops on the stove to 400 degrees. I am burning seasoned oak. Any advice .