So I have a split level with a finished basement. There is a large 8x24 return in the hallway of the upstairs and a 8x24 return in the lower level. Then in the basement there is a 10x10 return in the ceiling and a 8x10 return right beside the return stack. Here is the issue. If I don't cover the 8x10 return it sucks super hard and is somewhat noisy, all the other returns suck decent using the paper to grill test. If I cover the 8x10 return it quiets that return and doesn't make the other returns nosier but does increase their sucking power using the paper to grill test. The main return stack has a 20x25 filter and the blower is set to at least 1000cfm, the goodman led say 10 which is times 100. Question: if I cover the 8x10 return vent will it affect the furnace, ie lower service life?