Flexible Ac Ducts In Attic

Arizona home performance standards require that every flex connection be sealed with mastic for a 50 year plus lifespan.

Flexible ac ducts in attic.

But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. The air ducts for a central hvac systems are typically located above a home in the attic or upper crawl space or underneath a home in the space between the foundation and the floor so. 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. I called out the original hvac company and they took a look and said they saw no water.

I live in montreal and had a lennox air conditioner and ducts installed in the attic. I ve written a lot about duct problems especially those in flex duct because they re so abundant. I was wondering is there any figures on the expected energy temp lose. In homes older than 20 years duct tape may have been used as a sealer.

Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation. This additional insulation provides greater thermal efficiency to save energy. Save up to 30 when you sign up with this link to housecall pro. 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. My answer was no but that we need better quality control. Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct. 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.

Cost of installation supplies. Sometimes the best route for a flexible duct run is up and over an obstruction. 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.

It was new when the ac was put in 7 years ago. 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. The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product. The master flow 6 in.

When i updated and reposted the article recently at green building advisor jack lagershausen the executive director of the air diffusion.