Ash Weight or Density in Shoulder Months

Is it me or reality? I emptied my Keystoker 90 ash pan tonite and it seemed heavier. Is it possible the ash becomes denser as the burn rate drops?

Same thing happens to mine, there is more partially burned coal in the ash during the mild weather.

That's because the burner is idling a lot more during this time of year. An Idle fire has less air and therefore burns at a cooler temperature. This means more partly burnt coal ends up in the ash pan. Partly burnt coal weighs more than ash does.

So, no, you are not crazy, the ash pan is heavier.

-Don