Did removing the pipe outside help any?
Stoves with high EVLs tend to have burn issues on low settings. Run it on the medium/hi settings and keep it clean. Another thing you could do to save a buck is use an adapter tee. And just install 4 inch outside for now. Should help the low burn some.
Stoves with high EVLs tend to have burn issues on low settings. Run it on the medium/hi settings and keep it clean. Another thing you could do to save a buck is use an adapter tee. And just install 4 inch outside for now. Should help the low burn some.