The short answer is that there is no “good” BTU for a gas grill. Many people mistakenly think a grill’s BTU measures temperature, when in reality it’s just an indication of how much gas the grill is capable of burning in one hour (BTU/h). BTU on a grill is simply about fuel efficiency, like miles per gallon on a car. Though BTU rate does influence temperature, it’s far from the only thing that determines how hot your grill can get.