Answers to quiz:
1. Quality construction.
2. One Btu is the amount of energy it takes to raise the temperature of 1
pound of water 1deg. Farenheit.
3. There are 100,000 Btu in a therm, and 3,413 Btu in a kilowatt.
4. See the edition of Climatography of the United States for your state
to determine local heating degree days.
5. Annual fuel utilization efficiency, which accounts for the effects of
on/off cycling, flue losses and other factors that affect furnace efficiency
under actual operating conditions.
6. Volatile organic compounds, a class of carbon-based chemicals that
evaporate easily, thus giving off vapors that can be inhaled.
7. Relative humidity, air temperature, velocity of air flow, and mean radiant
temperature.
8. Insulation voids, thermal bridging, convective loops in dropped soffits,
air leakage through insulation, and air intrusion.
9. The U-value, which is a measure of the number of Btu that will actually
flow through a square foot of a given material in an hour for each degree of
difference in temperature between either side of the material.
10. The ASHRAE Standard 62-1989 Ventilation for Acceptable Indoor Air
Quality suggests minimum ventilation rates for residential living areas of
0.35 air changes per hour (ach) of continuous fresh air based on volume of
conditioned space, but not less than 15 cfm per person based on design
occupancy.
11. Shading coefficient, which is the ratio of total solar heat gain through a
specific window, to the total solar heat gain through a single sheet of glass
under the same set of conditions.
