I'm trying to get more heat and cooling to the second floor in our
We have a few sections of flexible, metalized (but not metal) ribbed
tubing in the basement that connect the furnace to the ducts going
upstairs. This is probably slowing down a lot of the airflow. I'm
guessing they used it where they had to go up and around beams and
- leave it
- replace it with same sized galvanized ducting (5" I think) It would
be a slightly longer distance because of the limitations of the
- find a flexible ducting material that's smooth on the inside to
Thanks in Advance
You need to start by doing or have done a Manual D calculation. This
will help you figure out what is really wrong without guessing. Normally
this would be done by a contractor.
While I suspect you are on the right track, you may find that you do a
lot of work only to end up with minimal improvement.
I have two problems with my current system, and I have just lived with
it as it is not too bad. Come time for a new system, I will find someone
who will do all the right planning and improve my system at that time. I
will also look into a zoned system.
Good advice from Joseph, load calculation is first step. I'm a huge fan
of variable speed furnaces. They reduce your electricity consumption
and if matched to your home with proper calcuations will push air longer
which may help in reaching the second floor. You can buy them in both
80% effecient models and deluxe 90+% models which will save on gas
There comes a time in the affairs of man when he must take the bull by
the tail and face the situation. -- WCF
As the others have said, you really need a Manual D calculation,
with calculations for each run of duct. However. . .
My sense is that your ribbed duct isn't likely to be the major
source of the problem. While it will slow the airflow some, at
least it won't leak unless punctured. Metal rectangular duct, if
not properly sealed, which it wasn't until recently, will leak like
crazy, especially at every turn.
There are a ton of other factors that come into play, such as the
location of the thermostat - on the first floor, I'm guessing,
which would explain the lack of cooling in the summer on the second
I'd start with a consultation with a quality HVAC contractor who
can suggest various ways to fix the problems that are bothering
To reply by e-mail, remove the obvious word from the e-mail address
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.