I am trying to find out if a Squire insert we recently picked up for cheap is big enough for our house or if we should hold out for something bigger. I do not know exactly which model it is, but it is either model 51000 or 53000. It has both model numbers on the back with check boxes in front of them, but neither is checked. The serial number is 27796. The outside dimensions from the widest points are 29 1/2"W x 23"T x 20 1/2"D. The opening measures 18 1/2"W x 10"T. And it has a blower. Now about our house: The area we are heating (supplementally) is about 1500 sq./ft. all on one level. I recently tore out the firebox to our fireplace in order to install an insert, and the dimensions to the hole in the fireplace where we can put an insert are 42"W x 32"T x 21"D. So there is plenty of room for a larger insert, but the Squire that we picked up is quite nice and inexpensive. But we also do not want to skimp. Does anyone know the square footage this stove would be rated for? Thanks.