Deck 61: Heating Rroblems for a Two Floor House

Question 1

A 30 X 50 house has two-zone heating. The first floor is set to maintain 72 degrees, while the upstais is set to 75 degrees. The ceiling between the two floors is made of 1/2" plaster board with no insulation. What is the BTUH loss through the ceiling?

Answer 1

1,125 BtuH

Question 2

A door is installed between two adjoining 10 X 12 rooms on the second floor of a home with 4" brick walls and no insulation. What will the increase in BtuH loss be?

Answer 2

zero

Question 3

The BtuH loss of an outside concrete wall that is 100' long and 12' high that has no windows or doors in it is______ (Assume a TD of 62 ° F.)

Answer 3

42,400 BTUH

Question 4

A two story storage building is 100 X 200 feet, with the first floor half dedicated to a sealed refrigeration system with negligible BTU loss. What is the BTU requirement to offset ceiling loss in a single-zone heating system?

Question 5

A home requires 120,000 BTUH at peak use. The choice in furnaces is between 110,000 BTU at a cost of $4,000 and 135,000 BTU at a cost of $5,200.00. Which is the best choice?

Question 6

The BtuH loss of a framed outside wall with clapboard siding that is 15' long and 10' high that has no windows or doors in it, and with 3 -5/8" insulation batts in it is______ (Assume a TD of 40 ° F.)

Question 7

A two-story building is 28 X 40 with 10-foot ceilings. The ceiling consists of drywall and flooring on joists, in which 6" insulation has been laid. What is the expected BTUH loss with a temp differential of 55 degrees?

Question 8

A two-story building is 60 X 40 with 10-foot ceilings. The ceiling consists of plaster and lath, over which 1/2" insulation has been laid. What is the expected BTUH loss with a temp differential of 25 degrees?