Following is the wall insulation in IDF file:

!- wall insulation and framing material: R21

  Material,
    wall_consol_layer,       !- Name
    Rough,                   !- Roughness
    0.1397,                  !- Thickness {m}
    0.05966275,              !- Conductivity {W/m-K}
    120.801,                 !- Density {kg/m3}
    1036.25775;              !- Specific Heat {J/kg-K}

But the calculation result is not equal to R21.

(0.1397m) / (0.05966275W/m-K) = 2.34 m2-K/w = R13.

Why?

Following is the wall insulation in IDF file:

!- wall insulation and framing material: R21

  Material,
    wall_consol_layer,       !- Name
    Rough,                   !- Roughness
    0.1397,                  !- Thickness {m}
    0.05966275,              !- Conductivity {W/m-K}
    120.801,                 !- Density {kg/m3}
    1036.25775;              !- Specific Heat {J/kg-K}

But the calculation result is not equal to R21.

(0.1397m) / (0.05966275W/m-K) = 2.34 m2-K/w = R13.

Why?

Following is the wall insulation in IDF file:

!- wall insulation and framing material: R21
R21   
Material,
    wall_consol_layer,       !- Name
    Rough,                   !- Roughness
    0.1397,                  !- Thickness {m}
    0.05966275,              !- Conductivity {W/m-K}
    120.801,                 !- Density {kg/m3}
    1036.25775;              !- Specific Heat {J/kg-K}

But the calculation result is not equal to R21.

(0.1397m) / (0.05966275W/m-K) R21. (0.1397m)/(0.05966275W/m-K)=2.341494484m2-K/w = 2.34 m2-K/w = R13.

R13 Why?