We had our new Harman XXV installed on Friday. IT seems to work fine, and we are, of course, still learning how to make adjustments to gauge the fire/feed/etc. THe guys that did the install are nice folks, but I am not sure that the results are as they should be. The stove was installed in the basement with a pipe going up the back and out the wall above the stove. Looke like they used 3" or 4" pipe for the venting. !st Question - the pipe is only 1.5 inched from the drywall behind the stove...the owner's manual says 3" are needed. We did have the stove running for several hours and it got pretty hot but the wall behind the stove pipe did not get hot...only warm to the touch. Is this an Issue? This is our very first pellet stove and have no clue....obviously we are relying on the installer. 2nd question - the owners manual says on a cold start we need to fill the fire box with pellets....there is a footnote indicator but no footnote. If I put the system in TEST, it will fill the fire box with pellets. Alternatively, I tried putting a handfull of pellets in the firebox by hand.....what is best? Sorry if these are dumb questions, but I don't want to goof up the stove or burn down the house....thanks in advance for any advice.