there are two perfectly working NEW dryers at my property. the gas one is completely quiet (besides the noise it makes spinning) out the vent. the electric dryer makes a blowing (like a fan) noise out the vent the whole duration that it is running.

is it that a gas dryer makes no noise out the vent or do certain dryer models just not make any noise? what is this feature where it doesn't make noise out the vent called?

can you suggest good dryers 6-7 cu feet that don't make noise out the vent.