Most often flex duct is used to reduce cost or in places where metal duct work will not fit.
Change sheet metal duct to flex.
You can even use three sheet metal screws behind the first rib or two of the duct as long as you use mastic under the duct at the sheet metal connection.
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.
Flexible duct can degrade over time.
Flexible duct connector designed to isolate equipment noise and vibration from the ductwork proflex flexible duct connector consists of a fabric which is secured to sheet metal on both sides.
It collects dust and is almost impossible to clean.
The sample from above calculates out to 7 inch for flex duct size.
Sheet metal the strongest material costs more than non metallic or flexible aluminum ducting with additional labor costs for multiple turns.
Flexible aluminum ducting is slightly more expensive and less prone to tearing.
You mentioned that you were considering re insulating your current metal duct work.
Online residential ductulator.
Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation.
This is a great decision.
Flexible duct needs to be larger than pipes to allow the same amount of airflow.
Long poorly supported runs of flex duct sag stress and separate rigid ducting systems often called hard pipe are prone to their own brand of installer pitfalls particularly extra duct length if cutting off is awkward or just too time consuming unnecessary dead end extents are sometimes capped off and left.
If your budget allows you may want to consider resealing your duct work with a mastic product.
Typically the connector is inserted between the equipment and the ductwork.
Unscrew any sheet metal screws connecting metal duct to a boot or another section of duct.
In comparison to metal duct flex duct is easier and faster to install.
Bob s not a fan of flexible heating ductwork.
There s no question that flexible duct is easier to install than metal ductwork but consider this.
More than likely.
If you have had problems with holes or cracks in the past this may be a good choice.
This is because they re more versatile and flexible.
The flex duct size may be different than the hard duct that runs to that room.
Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system.
Cost of installation supplies.
Ryan shanahan i ve been told to avoid using metal screws with flex duct because the flex can tear easily once you create a hole.
