The largest in the Oakville™ Series the impressive Oakville™ X4 Gas Fireplace Insert has an exclusive dual burner split flow system that results in a firebox filled with a stunning triple flame pattern, and allows the option of independently operating the front and rear burners from 16,000 to 40,000 BTU’s. A superior heat circulating blower comes included with this model and when paired with the Oakville™’s air flow improvement directional baffles generates maximum blower efficiency. A stunning triple flame and massive 518 sq. in. viewing area makes this fireplace insert a perfect choice for larger rooms where a passion for luxury is evident.