How much cooling with boiler fan running and wood out

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lindnova

Feeling the Heat
Nov 15, 2013
369
SE Minnesota
How much do you think the burner fan cools the outdoor boilers if they run out of wood?

I have a Heatmor 200 with the forced air fan. When it runs out of wood the fan continues to run and the propane furnace will kick in and allow heat into the pipes to circulate and prevent the outdoor unit from freezing. I rarely happens, but in this cold weather if I don't have enough wood in and end up working late sometimes it is out for a little while. Usually not enough for the propane to even kick in - water temp 120-130 for example.

If I were to leave for a weekend I have wondered if it would be better to heat the house warmer, shut down the outdoor furnace, turn down the house thermometer and let the propane go on when needed,,, or just load full with good wood and take the chance that it might run out and the fan might be cooling for a while with the propane on.

I would think in these cold temps we have now near zero if I warmed the house to 75, turned the temp down to 57 and left, a full load of wood would last over 24 hours no problem.

Anyone have experience or thoughts?
 
Use an aquastat set to a desired temp. that is wired to shut the fan off?
 
Good idea. Thanks!
 
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