- Dec 31, 2006
- 74
thechimneysweep said:Acosta, I think we might be back where we started from: you have an outside air heatform fireplace.
It seems to me the most likely source of the cooling action is cold outside air entering the chamber that surrounds your heatform. This would create a cold box for your insert to live in. Further, your installer would most likely have had to cut through the tubes at the top of the heatform to install his pipe into the first clay liner, which would allow the cold air to flow right into the fireplace cavity itself and cool the heat exchange plenum on the insert directly.
If you haven't done this already, pack the outside air intake with ceramic blanket insulation and seal it on the outside.
Tom,
The installer didn't cut anything when he installed the stove. He simply slid the 1/2 liner into the damper and up into the existing 10" metal liner already in the chimney. The he stuffed the damper area with insulation.
I tried stuffing the outside vent with fiberglass insulation and it made no difference. I also tried incense into the vent and no detectable smell came into the house. I will try to seal up the outside vent better with ceramic blanket insulation.