This $3,719.00 NH DollarSaver certificate is good for one Vermont Casting Merrimack Wood Burning Insert from Hearthworks Fireplace Center in Hooksett. VERMONT CASTING MERRIMACK WOOD BURNING INSERT: 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 “set it and forget it” convenience with automatic set air back system which provides extra air over the top of the fire to speed up the start up process and automatically returns 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 with out having to continuously monitor your wood fire. Heats 1,000 – 2,000 square feet.