Residential Energy Audit - Chapter 8

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Residential Energy Audit - Chapter 8 - Quiz

Residential Energy: Cost Savings and Comfort for Existing Buildings [Book] by John Krigger, John Krigger & Chris Dorsi - House & Home - Saturn Resource Management, Inc. (2004) - Paperback - 318 pages

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Residential Energy Audit - Chapter 8

The most cost effective strategies for improving cooling efficiency are different from the strategies to improve heating efficiency. For example Shade trees will reduce the need for air conditioning but will not reduce the need for heating consumption.

Window glass with low solar heat gain coefficient (SHGC) will reduce cooling load, but heating efficient is improved by windows with a low U-factor.

Window glass with low solar heat gain coefficient (SHGC) will reduce heating load.

Low humidity helps reduce cooling energy consumption, but not heating consumption.

A home's cooling energy consumption depends on:

The combination of - radiant temperature - humidity - air movementdetermine comfort level .

___________ & ____________ determine the rate that a human body can loose heat.

The _____________ determines the rate that a human body can reject heat by evaporation of sweat.

Absorbed summer sunlight raises wall & ceiling temperatures, making these surfaces radiant heaters.

Relative humidity is the percent at which air at any temperature is ___________ with water vapor.

____________ is the temperature at which condensation begins.

Evaporative coolers are a excellent energy saving option for locations with high humidity & high dew point.

Ventilation works well when the relative humidity is up to _____%.

Air conditioners must remove moisture from the air to improve indoor comfort.

Circulating air inside your home will:

There are four types of heat gain in a home: - ______________ - internal heat gain - air leakage heat gain - temperature driven heat transmission

In most climates solar heat gain contributes about ___% of the total heat accumulation indoors.

Solar energy falling on the roof coming trough the windows account for most of a house's solar heat gain.

Internal heat gains refer to

Efficient appliances produce less waste heat.

Air leakage contribute to about 20% of summer heat gain.

Of the four heat gain factors (solar gains, internal gains, air leakage, heat transmission), heat transmission trough the shell of the house is the most important.

Heat transmission typically represents around ____% of the total load.

Energy conservation measures that block the sun before it strikes the roof or windows are the most effective.

Trees and plants that provide shade is the best long term investment for reducing cooling costs

A well planned landscaping program can reduce an unshaded home's summer air conditioning costs by ___% to ___%.

Trees and shrubs create a micro climate, increasing the shaded area's temperature.

Shading & _____________ (the process by which a plant releases water vapor) from trees can reduce the air temperature by as much as 9 deg F compared to unshaded areas.

Southern exposure needs __________ trees to block the sun from the south during the summer.

East and west vegetation should block ____________sun during the summer.

Studies by Lawrence Berkley Laboratory estimates that planting trees is ten times more cost effective than building new power plants for summer cooling.

Which of the following factors that are true for when you consider shading windows?

Window sunscreen fabric absorbs ___% to ___% of solar heat before it enters the home.

Window sunscreen must be installed on the __________ of the window to be effective.

Window sunscreen must be installed on the exterior of the window to be effective and therefor are not practical for outwardly opening windows such as awning or casement windows, unless attached to movable sash.

Metalized window plastic film can block _____% to ____% of solar heat on single pane glass.

Tinted film is as effective as metalized film.

Older types of metalized film do have the disadvantage of blocking out daylight in addition to solar heat.

Select the option below that are in order of least expensive (best return on investment) to most expensive (lesser return on investment).

The most important considerations in choosing an awning design are:

Awnings on the south side need a drop measurement of ___% to ___% of the window height to block solar radiation from high in the sky.

Awnings on the west & east side need a drop measurement of ___% to ___% of the window height to block solar radiation from lower in the sky.

Exterior shutters and shades are commonly more expensive that other method used to block the sun entering the window.

Replacement windows are a cost effective measure for reducing cooling costs.

What does SHGC stand for?

Solar heat gain coefficient is:

Visible transmittance measures how much light passes through the window glass.

Shading coefficient is

A reflective glass window has a shading coefficient of 0.55. The window glass will transmit ___% of the solar energy compared to that of clear glass.

In roofs, radiant barriers reflect heat radiation coming towards them. Which of the following is also true?

_ & __ determine the rate that a human body can loose heat.

A well planned landscaping program can reduce an unshaded home's summer air conditioning costs by _% to _%.

Window sunscreen fabric absorbs _% to _% of solar heat before it enters the home.

Metalized window plastic film can block _% to % of solar heat on single pane glass.

Awnings on the south side need a drop measurement of _% to _% of the window height to block solar radiation from high in the sky.

Awnings on the west & east side need a drop measurement of _% to _% of the window height to block solar radiation from lower in the sky.