Below is what I have for instructions that came with my Harman XXV. I am drafting at > -.6 in both high and low combustion modes. My magnohelic stops at .6 unfortunately, but I am going to borrow one that goes up to -2 this weekend. I turned the pot mentioned below to full CCW to minimize blower voltage, but it is still off the scale. They said not to worry about it at the end of the write up below, but I am wondering if I am burning too much fuel due to the increased draft? Question, I am planning to hook the fresh air inlet to a pipe and run it about 4ft into the next room through sheetrock for air circulation. Would this help me reduce my draft? Or, am I sweating the small stuff? Thanks! Ed 1. Plug unit into a 120VAC, 60 HZ outlet. 2. Close the hopper lid, front view door, and the ash pan. Neither pellets or a fire are required for this test. 3. With the mode selector in the "OFF" position, turn the feed adjuster to "TEST". 4. Record the high draft_____in W.C. (Normal is -.50 to -.60) The control will be on the High Draft for a total of 2 minutes. 5. After 2 minutes, the combustion motor will go down to low draft and the distribution blower will go on high. Allow approximately 15 seconds to pass for the combustion motor to slow before checking the low draft. 6. If the low draft is between -.35 and -.45, record the reading _____ in W.C. If the reading is higher, slowly turn the set screw counter-clockwise until the draft lowers. If the reading is lower, very slowly turn the set screw clockwise until the draft increases. NOTE: The test mode alternates from high to low draft every 60 seconds. If more time is needed for draft adjustment, wait until the next low draft cycle. NOTE: In some cases, the draft may not go as low as -.35 to -.45 even with the set screw completely counter-clockwise, ideally, you should just set it as low as possible.