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Which is more economical to install fibrous duct board or flex duct?
Wiki User
∙ 16y ago
Fiberglass Duct Board is cheaper to install than Sheet Metal Ducts. This is definitely the choice of most builders if you don't know any better.
Your Air Distribution Duct System should look like a tree ... comprised of a Main Trunk and Branch lines from that trunk. The trunk should bet smaller as it passes every several branches in order to maintain the pressure. Each branch line should have a manual damper (valve) to regulate the volume for balancing. Then you can eliminate hot and cold spots. All joints should be sealed with mastic and UL 181 rated tape.
The biggest problem is that while it may look good, its structure gets less rigid (spongy) and interior lining is disgusting after just a few years of normal use. It's literally falling apart after 5 years. Almost every client of mine whose home has a duct board (did I say cheap) system complains of Allergies and excessive dust.
The only benefit is that when you finally decide to install a safer, more reliable, once-in-a-lifetime metal system, the duct board system can usually be removed in less than an hour with just a knife. Then it is placed in trash bags to remove it from the house without getting airborne particles everywhere.
The only good use is when you want to line a return (with the foil side facing you) for additional insulation purposes.
The only thing worse than ductboard is a duct system made of Flexible main trunks connected to small duct board triangles being used for sub-distribution into smaller areas.Whoever dreamed that one up was really looking to rip you off. mrgeothermal.com
Wiki User
∙ 16y ago
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What is the R value of duct board?
1" Duct Board has an R-Value of 4.3
How do you seal duct vents?
With duct tape I install and maintain duct work for a living if you want to seal the joints just wrap the tape around the duct. If you need to cover a hole you will need to screw a piece of metal on the duct over the hole and tape over the edges of your patch. this is the simplest and cheapest way I know to do it.
What are the types of air duct?
There are three main types of air ducts: sheet metal, pre-insulated, and flexible duct work. Sheet metal air ducts can be made of galvanized steel or aluminum, and may be insulated inside or outside with fiberglass. There are pre-insulated air ducts, which are relatively inexpensive to install, made of fiberglass duct board, polyurethane foam panels, or phenolic foam panels. Air ducts can also be flexible ducts, made of flexible plastic over a wire coil.
What does duct work mean?
to install pipes in attic or under floors depending on what type house you have,to pipe in a/c or heat whichever it may be
Why the return duct of AHU is larger than supply duct?
The air is returning at a lower velocity, so you need a larger size duct.
What is the R value of duct board?
1" Duct Board has an R-Value of 4.3
Can a humidifier be used with a main trunk line made out of duct board?
No, you should not use a humidifier in a main trunk line that is made out of duct board. This will cause the duct board to rot from the moist.
How do you hide basement duct work?
Make a bulkhead or install a drop ceiling
Why doesn't your apartment have duct work?
If your apartment does not have duct work, the owner of the building has not had it installed. Perhaps they felt it would be too costly to install, or perhaps they are simply not interested in or see a need for duct work.
How do you install variable valve timing solenoid in 2000 Toyota celica?
Duct Tape
How do you stick clay to a poster board?
rubber cement, tacky glue, duct tape
How do I add register to hot air furnace duct in my basement?
Buy the register, trace out the the hole for the part of it that will penetrate the duct, cut the hole and install the register then screw it in.
How do you seal duct vents?
With duct tape I install and maintain duct work for a living if you want to seal the joints just wrap the tape around the duct. If you need to cover a hole you will need to screw a piece of metal on the duct over the hole and tape over the edges of your patch. this is the simplest and cheapest way I know to do it.
What is the vent in the center of the dash board under the mirror called?
The center vent, or defrost duct.
Is duct board aproved by Texas code?
If your talking Air Conditioning/Heating then yes it is approved and is the standard.
What are the types of air duct?
There are three main types of air ducts: sheet metal, pre-insulated, and flexible duct work. Sheet metal air ducts can be made of galvanized steel or aluminum, and may be insulated inside or outside with fiberglass. There are pre-insulated air ducts, which are relatively inexpensive to install, made of fiberglass duct board, polyurethane foam panels, or phenolic foam panels. Air ducts can also be flexible ducts, made of flexible plastic over a wire coil.
Which is more economical to buy 1.5 or 2 ton AC for the same room?
This depends on the total sq. footage, proper duct size, and how well the structure is insulated. As a general rule of thumb you should have 1ton for every 500sq ft. of space, so given this if it is well insulated go with the 1.5, if not go with the 2. With the given formula a structure that is 750sq. ft. and well insulated should be very economical with the 1.5ton. But if the same structure is poorly insulated a 2ton would be the most economical. This is just a quick response due to the fact of not knowing all the variables such as existing duct size and shape, along with several other factors.
