My wife and I bought my home place I was raised at . It’s a 70 rancher 2600 sq ft all 8’ flat ceilings . With that said we always heated with a big country flame insert with stainless liner up the flu. Old owners must of sold insert but I’ve found this one for sale but I can’t identify year , model number , cat or non cat . The tag seems worn and I’m pretty green on inserts . Thanks in advance for any help on identifying what this unit in pics is .