I bought two bags of H.E.A.T LLC pellets , and was given a third becuase it was torn open. They are not very hot. I have been burning the Fuel King pellets I got with the stove and when it was -18 i had to crack the window a little with the settings of 1-1 and the bottom settings of 3-4-1. It is in the 40 s now and having to burn the HEAT on 3-4 to keep it in the low 70's. I guess all in all its good for this type of weather. I bought 3 bags of Somersets today and am currently letting the hopper empty out and will load up a hopper full of Somersets.