Can I use a wood buring insert in Temco Fireplace?

Bought a house and it has a temco fireplace in it (Premade from what I can tellwith an 8" pipe for the chimney, can I install an insert into this??
Also it appears the door Frame is mortarted in... not sure why.. need thoughts on removing this.. currently it does not create enough heat, since most of it goes up the chimney..
Thoughts???

TFC42-4. it says do not use insert not specified for use with this product... anyone have an idea?

Rip it out and start new.

is there any way to get more heat out of the current set up?? Ripping it out would require taking out the brickwork... alot of work... thoughts?

I doubt it, though a quick google says there are 'energy efficient doors' available. I tried such things on and open fireplace before and they sucked. In fact, I dropped a set off at the dump this past Saturday. Open fireplaces are mechanisms for heat loss in your entire home with the exception of a few feet around the unit. Might be a good idea to post some pictures so more seasoned renovators have an idea of what you're dealing with. Some ZC Fireplaces say it's ok to put an insert in them, but yours says otherwise and it's always a good idea to err on the side of caution. You could feasibly have the thing cut out and preserve the brickwork, but honestly if it's a ZC, it's probably just veneers and easy enough to replace pretty cheaply. Refacing it would be pretty easy using veneers or tile and easily a DIY project (just use legit mortar and not mastic with sand it it....don't trust HD or Lowes to steer you correctly either). There are some pretty good ZC rip outs and replacement posts on here with some pretty extensive pictures. Just make sure you have a permit and are doing things up to code so your Homeowners Insurance doesn't freak out in the even of something wrong. Or just hire someone and make sure they have a permit....my homeowners insurance requires professional installation/certifications on all combustion installations.