Single wall is supposed to 18" to combustibles. Without looking at the manual, I bet the close clearances listed are when using double wall connector pipe.
If you move it out and eliminate the elbows, will your hearth pad still be in the same place? At most, you probably would only have to move it a few inches to maintain the 16" required in front of the stove.
If you move it out and eliminate the elbows, will your hearth pad still be in the same place? At most, you probably would only have to move it a few inches to maintain the 16" required in front of the stove.