Absolutely horrible duct design for half the house. Poor air flow

HVAC GUY
27 followers
Oct 28, 2026
Tools I Use In My Videos 👇👇👇
https://www.amazon.com/shop/hvacguy
Poor air flow in part of the house. Two 7”, and two 6” ducts on an 8” pipe. This has never worked right.
all right guys we are up in the attic and you see
i'm dealing with this duct work here on this side
of the house they got good airflow i got a 16 inch duct on the plenum
but on this side of the house
they have poor airflow that to me looks like an eight
and it has two sevens and two sixes coming
off of it that ain't big enough um i think i'm
gonna recommend we come back with at least a 12
put in some dampers so we can control the air
and i might extend that plenum just a little bit
to um give it better airflow
or maybe even run it down the side there because that looks like a
a 30 foot stretch of seven right there that goes
all the way over there yeah we might run that run
that branch down a little bit further i mean
that's that's a lot of air coming off of an
no wonder they got poor airflow
tis the things we find 10-15 years after it's been installed
