You mentioned that you were considering re insulating your current metal duct work.
Change sheet metal duct to flex.
Typically the connector is inserted between the equipment and the ductwork.
The sample from above calculates out to 7 inch for flex duct size.
This is a great decision.
Flexible aluminum ducting is slightly more expensive and less prone to tearing.
You may need to buy a sheet metal fitting to properly connect the correct size of flex duct to the hard duct.
Flex ducts are better for existing trunk and branch heating and cooling systems.
Most often flex duct is used to reduce cost or in places where metal duct work will not fit.
Sheet metal the strongest material costs more than non metallic or flexible aluminum ducting with additional labor costs for multiple turns.
Cost of installation supplies.
If you have had problems with holes or cracks in the past this may be a good choice.
The flex duct size may be different than the hard duct that runs to that room.
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.
Unscrew any sheet metal screws connecting metal duct to a boot or another section of duct.
Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation.
If your budget allows you may want to consider resealing your duct work with a mastic product.
Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system.
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.
Bob s not a fan of flexible heating ductwork.
Flexible duct needs to be larger than pipes to allow the same amount of airflow.
Pull the duct from the boots and set it aside to either be thrown away or recycled.
In comparison to metal duct flex duct is easier and faster to install.
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.
More than likely.
There s no question that flexible duct is easier to install than metal ductwork but consider this.
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.
