In a previous house I owned some of the floor registers were at the ends of very long 5 inch air ducts. The ducting was mostly straight runs, but overall was so long that the aggregate air flow reduction meant I could lay a facial tissue on each floor grill and it would not blow away.
That's not a problem we have. We partially close some vents, because they blow so much air -- even the ones furthest away from the furnace. Earlier this winter, one of my kids left a balloon sitting on a register, and we got a great lesson on the Bernoulli effect.
Previous Topic
Index
