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Outside conditions
Inside conditions
20° F = -6.7° C
30° F = -1.1° C
40° F = 4.4° C
50° F = 10° C
60° F = 15.6° C
70° F = 21.1° C
80° F = 26.7° C
90° F = 32.2° C
100° F = 37.8° C
110° F = 43.3° C
120° F = 48.9° C
20° F = -6.7° C
30° F = -1.1° C
40° F = 4.4° C
50° F = 10° C
60° F = 15.6° C
70° F = 21.1° C
80° F = 26.7° C
90° F = 32.2° C
100° F = 37.8° C
110° F = 43.3° C
120° F = 48.9° C
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10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
not used
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z
Optional (user-defined) wall materials
R-value (Imperial or I-P units)
R-value or RSI (SI units)
Perm rating (U.S. units)
Perm rating (metric perm)
Perm rating (SI units)
Temperature (°F)
Temperature (°C)
Humidity Ratio (grains/lb)
Humidity ratio (kg/kg)
U.S. (imperial or inch-pound) units:
S.I. units for R-value and metric perm units:
S.I. units for R-value and equivalent S.I. perm units:
Total wall thermal resistance and resistance to permeability values
Individual material thermal resistance and resistance to permeability values
air film, exterior
cladding: 4-in brick
cladding: wood or vinyl siding
internal air space not counted
insulation: 2 in. rigid polystyrene
insulation: 3-1/2 in fiberglass batt
insulation: 5-1/2 in fiberglass batt
air-vapor-water barrier
air-water barrier like Tyvek
exterior sheathing: 1/2 in plywood
exterior sheathing: 1/2 in gypsum
vapor retarder: 6 ml polyethylene
interior finish: 1/2 in gyp bd
air film, interior
user-defined X
user-defined Y
user-defined Z