I am seeking advice on a fireplace (not am insert) to replace the decorative unit that I have (non-masonry) would prefer an EPA rated unit if possible. Larger firebox the better and would want minimum 20" log length. We have a 4900 sft house and looking to offset some of our propane heat usage which is ridiculously expensive. Any advice on some model options appreciated. Would like to make a purchase soon. Thanks!