Recommended home insulation r values.
Attic duct insulation r value.
Return ducts ductwork that brings expended air back to the hvac system to be filtered reconditioned and redistributed require insulation with an r value of 3 5 for exterior ducts and ducts in a ventilated attic or unvented attic above an insulated ceiling.
Unheated basement or crawlspace.
Insulation level are specified by r value.
Some other factors to consider.
7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.
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.
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.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
R value is a measure of insulation s ability to resist heat traveling through it.
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.
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.
Some other factors to consider.
The higher the r value the better the thermal performance of the insulation.
The table below shows what levels of insulation are cost effective for different climates and.
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.
How often do you think you get the full labeled r value.
How often do you think you get the full labeled r value.
Duct insulation recommended r values by climate and duct location.
The duct insulation r values i mentioned above are what s on the product label.
Warm cooling and minimal heating.
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.
