Full load mix Elm Spruce and touch of ponderosa Stove top 400 just to the right of cat. T/stat 4oclock and cat temperature 4oclock fan speed on low. I have a ceiling fan 6ft from insert set on low with winds at 20-30 Mph outside temperature of 30. Not trying to set any record here just need to know How low can your insert T/stat go before the cat stalls?