I just installed an old Dare IV insert in my fireplace. For those not familiar with these, they were made in Lewiston, NC by a company called The Harrington Manufacturing Company (no longer in business). The firebox and surrounding is made of steel and the doors are cast iron. I need to know what kind of temps I should look for on the doors because this is the only place to stick my magnetic thermometer. Anyone out there have experience with this model or one similar? For those interested, here is a pic of one (not mine).