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1" Duct Board has an R-Value of 4.3
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∙ 10y ago
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Which material has the highest r value stucco pine board concrete or fiber glass insulation?
Fiberglass Insulation, R Value of 3.14. Pine board has an R Value of 1.74
How was duct tape invented?
Meghan R. and Natalie D.
Where did the name r value come from in insulation?
Where does the R value, respiratory quotient or RER come from.
What is the R-value of Normal Weight Concrete per inch of material?
Normal Weight Concrete at 150 pcf has an R value of 1.22 per inch thickness
Which is more economical to install fibrous duct board or flex duct?
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
Which material has the highest r value stucco pine board concrete or fiber glass insulation?
Fiberglass Insulation, R Value of 3.14. Pine board has an R Value of 1.74
What is the r value of drywall?
Drywall provides an R-value of 0.32 for 3/8" board, 0.45 for 1/2" board, 0.56 for 5/8" and 0.83 for 1" board. In addition to increased R-value, thicker drywall has a higher STC.
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.
What r the advantages of side view of the duct?
what r the advantages of side view of duct ? why we plot side view of duct ?
What is the r-value of 2 foam sound board?
I assume you mean 2 inch thick foam sound board??? The answer lies in what type of foam specifically you are speaking of.Polyisocyanurate foam has an rvalue of approx. r-7 per inch,being one of the higher r value foams readily available in 4'x8' sheet size.Polystyrene foam board,commonly found in building centers and home centers,and commonly referred to as "Dow" board has an r value of approx. r-5 per inch.To calculate the 2" thickness you reference,simply double the r value given(r value is generally stated as "r value per inch".Thus ,2" polystyrene has an r value of r-10 (r-5/inch x 2).These are fairly general guidelines,and depending on your application,you may want to find more detailed specifications that speak to degradation of R value over time,properties and characteristics of various foam types,etc,etc.
What is the R-value of posterboard?
The R value of poster board is about 1.3. Really it is about 1.2783 but I assume 1.3 will be close enough. good luck for whatever you need it for!
What r the advantages of side view of duct in compressible flow?
why we plot side view of a duct?
How was duct tape invented?
Meghan R. and Natalie D.
How do you stick clay to a poster board?
rubber cement, tacky glue, duct tape
What has the author R W Hovey written?
R W. Hovey has written: 'Duct-fan for light aircraft'
What is the vent in the center of the dash board under the mirror called?
The center vent, or defrost duct.
What are some board games that begin with the letter r?
Risk is a board game that starts with R
