Question

1. hvac the r - value of blown fiberglass is 2.2 per inch of depth. the r - value of blown cellulose is 3.7 per inch. what is the total difference in the r - values of the two materials for 12 inches of blown - in insulation?

Explanation:

Step1: Calculate R - value of blown fiberglass for 12 inches

The R - value per inch of blown fiberglass is 2.2. For 12 inches, the R - value is $2.2\times12 = 26.4$.

Step2: Calculate R - value of blown cellulose for 12 inches

The R - value per inch of blown cellulose is 3.7. For 12 inches, the R - value is $3.7\times12=44.4$.

Step3: Calculate the difference

The difference in R - values is $44.4 - 26.4=18$.

Answer:

18