The Merrimack combines our wood burning heritage and everything you love about burning wood with contemporary concerns for the environment. This EPA certified insert is among the cleanest burning wood inserts available and offers an amazing array of features and benefits. The Merrimack is the ultimate in “set it and forget it” convenience with the Automatic Air Setback System which provides extra air over the top of the fire to speed up the start up procedure, and automatically returns to the primary air control setting of your choice. This feature, combined with the included high volume, heat activated, variable speed fan, is the perfect solution to ensure a constant heating temperature or burn level without having to continuously monitor your wood fire. Choose from two optional surrounds to create a custom fireplace look and suit your traditional or contemporary décor.