For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.
Attic duct insulation r value.
The duct insulation r values i mentioned above are what s on the product label.
R 6 duct insulation 6 305 btu hour 0 53 ton r 4 2 duct insulation 7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.
R value is a measure of insulation s ability to resist heat traveling through it.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Table 1 shows effective r values for 8 inch round ducts at three attic insulation levels and three duct insulation levels r 4 2 r 6 and r 8.
6 305 btu hour 0 53 ton r 4 2 duct insulation.
7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.
C403 2 9 duct and plenum insulation sealing 1 supply and return air ducts and plenums shall be insulated with a minimum of r 6 insulation where located in unconditioned spaces and where located outside the building with a minimum of r 8 insulation in climate zones 1 4 and a minimum of r 12 insulation in climate zones 5 8.
The duct insulation r values i mentioned above are what s on the product label.
Recommended home insulation r values.
Some other factors to consider.
How often do you think you get the full labeled r value.
The higher the r value the better the thermal performance of the insulation.
The effective r value of a buried duct installation depends on the size of the ducts the r value of the duct insulation and the depth of the loose fill insulation.
Prescriptive attic options climate zone hvac duct insulation leakage radiant barrier r 30 at ceiling attic floor r 38 at ceiling attic floor fiberglass below roof deck between rafters air handler ducts in the attic option b 1 r 6 or r 8 depending on cz all with 5 leakage 2 3 5 7 10 16 r 13 4 8 9 11 15.
The table below shows what levels of insulation are cost effective for different climates and.
When insulating ducts understanding the meaning and impact of r values and insulation thicknesses is essential to getting the most efficient affordable outcome on your heating installation project the ratings provide a guide for homeowners that determines the effectiveness of the insulation making it easier to choose the right insulation for your home.
Unheated basement or crawlspace.
Mixed moderate heating and cooling.
Some other factors to consider.
Warm cooling and minimal heating.
Duct insulation recommended r values by climate and duct location.
