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Flexible ac ducts in attic.
Insulated flexible duct r8 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.
Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.
To prevent problems use saddles or straps to support at regular intervals 4c 4d follow the manufacturer s instructions but in case they get lost here is a list of best practices for.
Sometimes the best route for a flexible duct run is up and over an obstruction.
If your ductwork is not properly sealed every time the hvac unit kicks on you are throwing money out the window by heating and cooling the attic.
I called out the original hvac company and they took a look and said they saw no water.
Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation.
Cost of installation supplies.
Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct.
I was wondering is there any figures on the expected energy temp lose.
I live in montreal and had a lennox air conditioner and ducts installed in the attic.
The master flow 6 in.
If you have central heating and or air conditioning in your home the warm or cool air is delivered to each room through a system of connected ducts and vents.
The attic ductwork is flex duct work.
Arizona home performance standards require that every flex connection be sealed with mastic for a 50 year plus lifespan.
Item 1790033 model 1790033.
When i updated and reposted the article recently at green building advisor jack lagershausen the executive director of the air diffusion.
The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product.
My answer was no but that we need better quality control.
This additional insulation provides greater thermal efficiency to save energy.
A couple of years ago i even wrote an article about whether or not flex duct should be banned.
1 10 5 25 per foot insulated flexible duct 4 to 16 diameters used as branches or in radial duct attic systems 2 30 13 00 per foot round and oval sheet metal duct 3 to 8 diameters typically used for trunks in small homes and.
I ve written a lot about duct problems especially those in flex duct because they re so abundant.
What i ve observed attic temp 50c vent temp 21c attic temp 37c vent temp 18c attic temp 25c vent temp 13c not sure what the r value off flexible duct or main metal duct is.
In homes older than 20 years duct tape may have been used as a sealer.
