a good quality of heating, so I have a inchauffable barn, I put (two) to hold a mini weakens if the chimney at night! and it works. I have not pushed in watts, only in first gear. FYI room of 45 m² plus 16 m² bedroom to heat and volume addition in kitchen, ceiling 2m70. a good purchase, which must be confirmed by the product term, and that only time will give the answer.