I purchased a Harman p68 yesterday. It's going to be installed in the corner of my living room because the installer who came to size things up said that my hearth which is on the side of the room wouldn't be the optimal location as far as air flow through the house. OK - I can understand that. But next he told me to buy a standard hearth pad with 2 cuts rather than a corner pad because that way he can "nudge it into the corner" and provide better floor protection for the exhaust. Now the only possible way I can see that being done is if puts the pad in backwards and sort of butts the diagonal cuts against the baseboard. I told him I wanted a corner pad but he was adamant that this is the best way. Am I missing something? Also, he insists that I do not need a vertical rise outside the house, just a direct horizontal vent. He's installed a million of these pellet stoves and I suppose I should just assume he knows what he's doing, but...HELP! Any advice??? Thanks!!