Again, just keep your eye on it.
I had the fire go out so many times last summer I lost hair over it!@ haha
(you would hear the stoking, and let it be...then go down to check it out and there
would be a ash bin full of coal....fire went out)
Not something to worry about too much now, but when it starts to get warm out,
you will want to check on it a few extra times a day....just a quick looksee.
I can run 2min/50min-1hour during the summer...but with good draft.
I pay very close attention during very hot days or when the low to high atmos pressure is changing.
Chances are that the 2min/30min would get you up to the HL during summer, but
each install if different. You will need to play and then record your settings....
both timer and air/feed for summer and winter settings.
That way it will be a quick job when the seasons change.
Only in my second winter with the EFM , but much better after tinkering and asking questions.
If there is major issues....always read the manual. When nothing seem to work,
or if there was not an answer from a problem, the manual always worked.
Most of the time resetting everything to the manual setting and problems were corrected.