"elanamig" wrote in message
ups.com...
Hello,

We're planning to have air duct cleaning done soon, and I've read
through some advertisements and have more questions than answers.

#1. One guy claims that they use a 200HP "Monster Vac" - a unit on
the truck of a car that stays outside the house, and is thus "mess
free". They say that they're better than others because other
companies use hand-held or indoor vacuums that are not as powerful and
might leave some dust inside the house. Is that true?? Is the
outdoor, truck-powered unit better than indoor ones?

If all they do is use a vacuum, then I doubt it will do much good. When I
had mine done, they stuffed an air hose down the "house-end" of the air
vents. On the end of the hose was a swirling head with a few pieces of
rubber to spin around & loosen up the dust & dirt. At the "furnace-end"
they attached some kind of vacuum that then sucked all the dirt out kicked
up by the air hose thingy.