Table 2 – Calculated annual savings for a 1,540 ft2 house with well-insulated and sealed ducts, or no ducts, in the attic

Original attic condition

Insulated and well-sealed ducts

No ducts

R19 Attic Insulation

Code-level Attic Insulation

R19 Attic Insulation

Code-level Attic Insulation

Attic system modification

Add RB, add insulation

Add RB

Add RB

Add RB, add insulation

Add RB

Add RB

Miami  (1)

$75

$50

$40

$40

$20

$15

Austin (2)

$110

$50

$40

$60

$20

$15

Atlanta (3)

$100

$30

$25

$55

$15

$10

Baltimore (4)

$170

$30

$20

$120

$10

$5

Chicago (5)

$150

$20

$15

$110

$5

$5

Minneapolis (6)

$180

$20

$10

$140

$5

$0

Fargo (7)

$150

$15

$10

$120

$0

$0

Fairbanks (8)

$210

$15

$10

$180

$5

$0