I have an approx 1800sqft crawlspace that is 18" in height. Next week, I am planning to put a thick vapor barrier on the crawlspace floor and close of all the vents to try to seal off the crawlspace from outside as far as possible.
I am also installing a fan (110 CFM Nutone ultra quiet bathroom fan) on the subfloor to push conditioned air from the living area into the crawlspace (see attached image for location of the fan and the direction in which conditioned air will be pushed into the crawl space. There are enough gaps and small openings in the subfloor so the air from crawlspace will have a return path back to the living area.
What I wondering is:
1) whether, a single fan is sufficient or if I should be installing more fans? (see attached image for location of fan and the direction in which the fan will push conditioned air into the crawlspace)
2) How many hours per day should I be running this fan or should it be running 24x7 ?
I am also installing a fan (110 CFM Nutone ultra quiet bathroom fan) on the subfloor to push conditioned air from the living area into the crawlspace (see attached image for location of the fan and the direction in which conditioned air will be pushed into the crawl space. There are enough gaps and small openings in the subfloor so the air from crawlspace will have a return path back to the living area.
What I wondering is:
1) whether, a single fan is sufficient or if I should be installing more fans? (see attached image for location of fan and the direction in which the fan will push conditioned air into the crawlspace)
2) How many hours per day should I be running this fan or should it be running 24x7 ?