Intro to Building Science Flashcards

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1
Q

What are the EIA housing types?

A

Single-family, multifamily, mobile homes

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2
Q

How much excess energy do US homes consume?

A

$45 billion

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3
Q

What’s the average annual household energy cost?

A

$1,400

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4
Q

Where do most energy stats come from?

A

The Department of Energy Information Administration (EIA)

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5
Q

Natural gas provides over 50% of the energy used in houses. For what?

A

Space heating and hot water

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6
Q

Space heating consumes around half of the energy used in an average home, but accounts for about one third of total cost. Why?

A

Use of inexpensive NG

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7
Q

What’s the efficiency of natural gas at the point of use?

A

40-90%

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8
Q

Why is electricity more expensive than natural gas even though it’s 100% effective for heating?

A

Generation and transmission is only about 30% efficient.

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9
Q

What is energy conservation?

A

A change in behavior that results in less energy use, eliminates waste, and is often associated with a level of voluntary discomfort.

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10
Q

What is energy efficiency?

A

Maximizing the economic benefits of energy use, while maintaining the same level of comfort.

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11
Q

What are the four main strategies for energy savings?

A

Thermal improvements to building shell, New, efficient HVAC/lighting/appliance systems, Repairing/adjusting existing equipment, Homeowner education (conservation)

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12
Q

Where do energy professionals find inefficiency?

A

Heating equipment, heat losses, air leakage, water heating, cooling equipment, heat gains, distribution systems, appliances and lighting, behavior

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13
Q

What makes up baseload consumption?

A

Day to day loads like refrigerator, water heater, lighting, and appliances

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14
Q

What makes up seasonal consumption?

A

Heating and cooling

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15
Q

Describe the Home Heating Index (HHI)

A

BTU/ft^2/HDD
Used for cold climates
Lower numbers are better

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16
Q

What indexes are used for homes in warm climates?

A

Energy Intensity: BTU/ft^2
$/ft^2
kWh/ft^2

17
Q

Describe the Home Energy Rating System (HERS)

A

A computer program compares home to code reference home
Lower is better
0 = zero energy home