I installed my stove (Englander 25 PDVC/55-SHP10) 5 years ago that I bought from Lowe's. Before I installed it, I read the directions and followed them 100%. The directions said, a OAK (Outside Air Kit) was recommended. So I installed it with one. I've had no problems with anything since I installed the stove. What I am getting to is, there are 4 to 5 people, at my place of employment, that also have pellet stoves. Just asking around at work, I was wondering if any of them had a OAK installed. All of them have NO OAK's installed on there stoves, with the latest one having there stove installed 2 weeks ago. Everyone of them had them installed by the dealer they bought them from. They were all told by there dealer that they didn't need one do to the fact that there house's were drafty, not air tight. I would think if it was recommended, why would you not won't to have one installed. Is it the fact that the dealers are not taking the time to install the stove's correctly or they just didn't want to take the time to do it. I also bowl with a fellow that just bought a stove and it will be delivered in 2 weeks & installed by dealer were bought. I said to him about having a OAK installed & he told me the same thing, dealer said he didn't need one. Are the stove directions/instuctions that different from stove brand to stove brand or what. They all looked at me like I was crazy when I told them ought to have one installed. My thoughts are if you have one installed, it make your stove a sealed unit. Meaning, there is no way any smoke could ever get out of the unit. The air kit comes in from outside & exhaust to outside there flue pipe. That would atleast make it sealed unit unless you have a leaky gasket somewhere. If the power were to go out, and your exhaust fan were to stop, because you didn't have a backup power source, wouldn't the smoke excape thru the air intake port and fill your house with smoke. If you atleast have a OAK, the smoke would atleast go out thru your air intake to the outside. Am I wrong or what. Just wondering what you guy's thoughts were on this. I'm thinking these guy's didn't get a properly install stove, but they pretty much bought them at all different places and installed by different dealers. What are your thoughts.