What's the difference between r6 and r8?

Asked By: Eutimia Yelo | Last Updated: 15th February, 2020
Category: home and garden indoor environmental quality
4.6/5 (330 Views . 11 Votes)
The thickness in the ducting materials used to make R6 and R8 ducting is one of the glaring differences between the two. R8 ducting uses thicker insulation than R6 ducting. This means that if you were to do air conditioning installation using R8 ducting, you get better insulation than if you are using R6 ducting.

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Similarly one may ask, what is r6 duct?

Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4. 2 product. This additional insulation provides greater thermal efficiency to save energy.

One may also ask, what is the best AC ducting? Flex ducts are good for air quality because you are not breathing in fiberglass insulation lined ductwork like the Fiber Air Ducts and they are mold and rust resistant unlike galvanized sheet metal ductwork.

Keeping this in consideration, how thick is r6 duct insulation?


What is the best duct insulation?

The fiberglass duct board is by far the most effective. You can find formaldehyde-free insulation that also has an acrylic coating. This coating will help to keep the glass fibers from your airstream and excess noise from your home. You will also be able to enjoy a higher air quality.

39 Related Question Answers Found

Is flexible ductwork good?

Flexibility. Flex ducts are better for existing trunk-and-branch heating and cooling systems. This is because they're more versatile and flexible. Metal ducts are more rigid due to the nature of steel, making them ideal to build an entire HVAC system.

Does ductwork need to be insulated?

Insulation is applied to ductwork to enhance thermal performance and prevent condensation and dripping. Return air ducts only need to be insulated if they pass through environments that adversely affect the return air temperature. Exhaust air ducts normally do not need insulation.

What is the R value of flex duct?

For example, a six-inch diameter, nominal R-8 flex duct has an actual R-value of only 5.62 not counting surface films. With the film resistances the total R-value of 6.45 is 19% less than the nominal value. For R-11 ducts (six-inch diameter) the R-value with films is only 7.81, 29% less than the nominal value.

How much does flex duct cost?

Flexible ducting with built-in 3 insulation typically costs $1.30-$2.50 per linear foot.

How good is r6 insulation?

Learn how these standardized rating systems ensure consistency in energy performance
Rated R-Value and Thickness of Insulation*
R-Value R6
Insulation Thickness 1.75" 2.5"
* All listed thicknesses are approximate and may vary by +/- 0.5 inches.

How do you insulate ductwork?

When insulating HVAC ductwork, use a foil faced fiberglass insulation with an R-6 or higher R-value. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Make sure the foil surface of the insulation is free of dust before applying the tape.

Do I need insulated duct for bathroom fan?

If bath fan ducting isn't properly insulated, the moist air from your house will condense inside the duct. The first step is to head to the attic. You may find that the insulation simply needs to be refastened. If your ducts are properly insulated, another potential cause of condensation is lack of use.

Why the ducts are used in an air conditioning system?

Ductwork channels conditioned air to vents, takes return air back into the system and transports exhaust air and waste heat to the exterior of your home. Ducts serve a triple purpose: They carry warmth in winter, hold cool air in summer and provide ventilation for better indoor air quality throughout the year.

What are good insulation materials?

Insulation Materials
  • Fiberglass.
  • Mineral wool.
  • Cellulose.
  • Natural fibers.
  • Polystyrene.
  • Polyisocyanurate.
  • Polyurethane.
  • Vermiculite and perlite.

What is the thickness of r25 insulation?

Series Name N/A
Length (Inches) 96
Thickness (Inches) 8
Coverage Area (Sq. Feet) 64
Package Quantity 6

What is duct insulation?

Thermal insulation is a great way to minimize energy loss in ducts. Insulating ducts helps the air within stay at the desired temperature. It also prevents the ducts from leaking air. Ducts which leak air can result in greater energy consumption and expensive utility bills.

How do you insulate round duct elbows?

Tape each end of the football to the corresponding insulation already wrapped on the duct. Wrap the football around the elbow enclosing all of the exposed duct. Tape all seams with Reflectix Foil Tape or a UL 181 Acrylic Adhesive Tape.

Should ductwork be replaced after 20 years?

“If your ductwork is over 15 years old, you probably should replace it. Ductwork has a maximum lifespan of 20-25 years. By 15 years, however, it begins to deteriorate, significantly reducing your HVAC system's efficiency, so replacement is the prudent option.”

What are the types of ducts?

There are three common classifications of ducts - conditioned air ducts, recirculating-air ducts, and fresh-air ducts.

Can I replace ductwork myself?

Yes, having punctures in your ductwork due to pests is something that necessitates getting those ducts replaced, or at least repaired, and, yes, it is also a really tough job for you to take on yourself.

Can you use flex duct return air?

Re: Flex Duct on Return Air Diffusers - Yes or No? Flex duct effectively creates a tight radius elbow where it turns into the top of a diffuser. The high pressure loss is further increased because the flex fabric gathers at the inside of the throat and reduces the effective diameter.