Hello All, I am looking at getting the Harman Accentra 52i pellet insert. Can this unit be hardwired or is using the plug the only option to power it? It looks like a plug-in unit according to the online manual. If plug in only does anyone know if its rated for or can be plugged in a metal square wall type box within the original fire box to plug it into so the cord is not running across the hearth? Or will it get to hot to have a receptacle in the box? I have a masonry fireplace with chimney and a heatilator (I think its called. Metal type box inside the fireplace). I spoke with the county inspector on the phone and he said he would go by what the manufacture states in their manual. I hate to mount a receptacle in the original firebox only to find out the manufacture doesn’t recommend it. I asked the sales person she didn’t know and I can’t seem to find a number on the Harman homepage to call them. Sorry if this question has already been addressed I couldnt find it in the search box. Thanks in advance for your input. Next I need to search the OAK I've seen on this forum as she never mentioned it.