We bought the newer version of the castle serenity pellet stove as we had great experience with older model last 2 years. This one runs too hot. Flame on no. 1 is high. The top is too hot. The old model I could hold my hand on it. Called customer service. They said it was because we didn't attach an outside air source. Did it and no difference. They had me do diagnostics and said everything was fine. Well, it's not. Regret buying it. Buyer beware.