Review on Portable Space Heater: Dr Infrared Heater 1500-Watt, Optimal for Efficient Heating by Josh Culotta

this heater works amazing! heats an entire poorly insulated 35ft RV freezing to death with an oil filled heater, same wattage but oh my god this thing really puts out heat, heats an entire RV in freezing temperatures up to 70F in minutes on. HOWEVER, having said that, I have a lemon in it, the fan "rattles", rattles, map effect on the bike spokes, which is pretty maddening, bad bearing? and the way it runs every 5 minutes the rattling must be too much so I'm coming back, the heater worked well despite the 'rattling'. Worse, in the 2 weeks I've been using it, the "rattling" has become unbearable, especially at night. Amazon made the exchange easy for me and sent me a new unit and gave me 30 days to return the defective unit so I didn't have to be discouraged until the new one arrived. Very good, I really hope the new unit doesn't have the same problem, otherwise this heater is excellent. UPDATE The new device has arrived and works perfectly, the fan is quiet and the device works great, thanks Amazon for this excellent service with its good quality.