yes. they are typically bigger since you're moving a lot more air. you need
to talk to someone to design the ducting issues you're going to encounter.

"SteveB" wrote in message
news:vvfDd.51954$Cl3.7522@fed1read03...
I live in Las Vegas. We use evaporative coolers here. I want to add a
5,000 cfm for one side of my house.

My questions a

Is there a special ducting that is used for this and is different than AC
ducting? Do I need to run ducts to all the areas, or would just ducting
into the largest room do it? (The kitchen, living room, and family room
are all open to each other.)

I have to make a stand for this to go in through the attic. Making a hole
in a wall is not an option.

TIA

Steve