It's very good even in cold temps! We used it in our garage. WIH DOOR RAISED ALITTLE. all winter in Shakopee Mn.. with a 1500 Watt heater, with exhalent results, even with temps 
  in the single digits, with jackets on. and could have gone lower, but we wimped out at lower temps even in our garage! It's a great smoker, although it is only 275 degrees temp max. I wish it had a larger burner and wood burner trey. That said I would buy again and recommend to family and friends!