1. Each of the windows in the Office has dimensions of 42 in. width and 60 in. height.

What is the total area of the windows in ft² in the Office.

2. Each of the windows in the Dance Hall has dimensions of 54 in. width and 72 in.

height. What is the total area of the windows in ft² in the Dance Hall.

3. What is the gross area of the outside walls in ft² for the Office?

4. What is the net area of the outside walls in ft² for the Office?

5. What is the gross area of the outside walls in ft2 for the Dance Hall?

6. What is the net area of the outside walls in ft² for the Dance Hall?

7. Use the crack method to determine the infiltration rate in CFM for windows in the

Office. The windows are double hung windows. The infiltration through windows

per foot of sash crack is 0.37 CFM.

8. Use the air change method to determine the infiltration rate for the Dance Hall.

The air change rate per hour (ACH) is 1.5.

Note: Round off the calculated to the tenths (first decimal place).

9. Using the infiltration rates calculated in problems 7 and 8 above, calculate the

heat loads due to the infiltration in the Office and the Dance Hall.

Note: Round off the calculated to the ones place (no decimal place).

10 Calculate the overall heat transfer coefficient, U in Btu/h ft2 °F, of the walls in

the building. The construction of the walls is as below. Include inside and outside

air films where appropriate.

11. Calculate the heat transfer rates in Btu/hr for the outside walls and windows in

the Office. The windows are double glass aluminum frame window with 3/8 in. air

space.