said by jrs8084:Maybe yours is so cool because you are conditioning it
You have to find out why you have a negative pressure down there first.
As for sealing the door, I would be careful: Do you have any naturally aspirated fuel burning devices down
there? Hot water? Furnace? Dryers? (I remember you posting about your possibly noisy Kenmore)
Yes I have a natural gas furnace, HW heater and dryer down there. I am sure theres air flow there since my house was built in 1952 and the crickets find there way in every summer
One of these days I will replace the basement windows with screen ones.
Could the negative pressure be from the blower itself? I believe it draws the air from the basement.