I primarily burn pellets for heat, but the oil deamon still runs for my lower level (i have a split level, and the stove is on level 2 of 3 above grade, so level 1 stays cold without the oil boiler.) My hot water is off it as well so its on anyway. My question is, since I moved in, the previous owners had put a piece of insulation on the return vent from level 1 into the basement (level 0) (on the basement side), there-by blocking off the return vent to the basement which is foot-level on level 1 and eye level in the basment area, due to the house design. Should i remove this insulation for better results? Will this help pull warm air down into the room on level 1? Will it suck heat from the stove too? i'd like to use more pellets than oil if i can. Will this keep the basement warmer or cooler? I rent out this area to a buddy and there is no other heat source in this room than the boiler, other than his portable plug-in that eats juice. My basement is finished on the inside (the outer wall, which has a window, holds all the utilities, and a fake inner wall 4 feet out was created to wrap the utilities into the outer box and the finished area in the inside. What was their thought process to doing this?