Weak heater considering the 1500 watts it consumes. The flat mica panel doesn't radiate any heat and heat convection is poor. IMO it's a poor design. The Bionnaire works much better with its three angled panels. It puts out at least as much heat as an oil filled heater at full blast.That said, I am still waiting for a well designed mica heater. There is no reason these companis can't design these heaters better, using less current.