PrintThe questions below are your chance to test and practice your understanding of the content covered in this lesson. In other words, you should be able to answer the following questions if you know the material that was just covered! If you have problems with any of the items, feel free to post your question on the unit message board so your classmates, and/or your instructor, can help you out!
- What are the main factors that are important in selecting a window?
- Explain briefly what technological advances account for increase in performance of windows
- What are gas filled windows and how do they perform better than regular windows?
- Is it true that a person in Alaska requires high SHGC of windows?
- If thickness of the window is doubled what will be the new percentage heat loss.
- What will be the heat loss from a window if it is vacuum between two window panes
- A glazing material cost about $1/ ft2 which improve the insulation by 10%. What is the payback period of adding the glazing if originally window glass cost is $10/ft2 and heat loss from window is 1000 BTU/hr. Assume the cost of heating is $10/MMBTU.
- A house in State College, PA consists of the following: 12 single pane windows (each 6 ft by 3 ft with an R value of 1). Calculate the total number of Btus lost for one season through these 12 windows. HDD for State College are 6,000.
- Heat loss through a window (R-2) is 10 MMBTU/year. Calculate the payback period if following filling material is used. Assume heating price to be $10/MMBTU
Gas fill Additional Cost Effective R Payback period (year) Argon $20 7 Krypton $45 12 Xenon $75 20