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.
Attic duct insulation r value.
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.
Recommended home insulation r values.
How often do you think you get the full labeled r value.
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.
Mixed moderate heating and cooling.
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.
How often do you think you get the full labeled r value.
Duct insulation recommended r values by climate and duct location.
Warm cooling and minimal heating.
Insulation level are specified by r value.
R value is a measure of insulation s ability to resist heat traveling through it.
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.
The duct insulation r values i mentioned above are what s on the product label.
The duct insulation r values i mentioned above are what s on the product label.
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.
Some other factors to consider.
7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.
Unheated basement or crawlspace.
The table below shows what levels of insulation are cost effective for different climates and.
6 305 btu hour 0 53 ton r 4 2 duct insulation.
The higher the r value the better the thermal performance of the 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.
