Looking for recommendations to add an insert to our most inefficient fireplace. Location is in North Central MA. I am not planning on this as a primary heat source but looking for the ability to still run all day. House is only 1600 square feet built in the 60's with 1/2 that on the same level as the fireplace. I have previously owned a Drolet Escape 1800 free-standing in another house and miss that stove a lot! I am open to all manufacturers and have no serious preference. The fireplace opening is 37 wide x 21 High x 23 deep and drops by about 2-inch after the opening. The chimney is about 25 ft to the top.