Building Science Myths and Truths 1. If it weren’t for energy efficiency, we would be better off with houses that are not quite so tight?  True  False 2. Heat rises.  True  False 3. A 2 x 6 wall with R19 insulation is more energy efficient than a 2 x4 wall (R13 batts) and 1” of insulated sheathing (R5)?  True  False 4. High performance windows with Low E, argon gas fill, may be more energy efficient in winter than an R19 wall?  True  False 5. In general, leaky, drafty old houses have better air quality than newer tighter houses? True  False 

6. The solution to an attic moisture problem is to add more soffit and roof vents?  True  False 7. More moisture gets into wall and ceiling cavities by vapor diffusion than by air leakage?  True  False 1. A blower door is used to measure the energy efficiency of a house?  True  False 2. It is important to pack in insulation to make sure you get proper performance.  True  False 3. Duct leakage is not important when ducts are installed in the conditioned enclosure.  True  False 4. An existing house is considered “greener” than a new home?

 

True False

5. A HERs (home energy rating score) of 80 is better than a score of 70?  True  False 6. Selecting green building materials is the most important consideration when building a green home.  True  False

Myths and Truths.pdf

Page 1 of 3. Building Science Myths and Truths. 1. If it weren't for energy efficiency, we would be better off with houses that are not quite. so tight? True. False. 2.

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