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Double fan window units can have multiple operational modes; most often outdoor air will be brought in at night when outdoor conditions are cooler

Double fan window units can have multiple operational modes; most often outdoor air will be brought in at night when outdoor conditions are cooler
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Draft stopping and air barrier at tub enclosure − plan view

Draft stopping and air barrier at tub enclosure − plan view
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Draft stopping and air barrier at tub enclosure − side view

Draft stopping and air barrier at tub enclosure − side view
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Drip irrigation saves water by irrigating landscaping only where needed.

Drip irrigation saves water by irrigating landscaping only where needed.
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Ducted whole-house fans should be installed with the duct curved and the fan suspended from rafters to reduce noise and vibration transmission to the living area.

Ducted whole-house fans should be installed with the duct curved and the fan suspended from rafters to reduce noise and vibration transmission to the living area.
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Earth tubes buried in the ground can provide pre-cooling of ventilation air or primary cooling if designed deep and long enough

Earth tubes buried in the ground can provide pre-cooling of ventilation air or primary cooling if designed deep and long enough
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East- and west-facing walls receive significantly more sun than north- and south-facing walls in the summertime

East- and west-facing walls receive significantly more sun than north- and south-facing walls in the summertime
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Efficient showerheads can save 2,900 gallons of water per year.

Efficient showerheads can save 2,900 gallons of water per year.
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Energy 101: Cool Roofs

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Energy 101: Geothermal Heat Pumps

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Evaporative coolers use a fan to draw outside air through a wetted pad which cools and humidifies it

Evaporative coolers use a fan to draw outside air through a wetted pad which cools and humidifies it
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Evaporative cooling is most appropriate in areas where the summer design mean coincident wet bulb temperature is less than 70°F, shown in purple here and labeled as region “A”

Evaporative cooling is most appropriate in areas where the summer design mean coincident wet bulb temperature is less than 70°F, shown in purple here and labeled as region “A”
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Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house

Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house
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Example of a cool roof, painted white to reflect solar heat gain.

Example of a cool roof, painted white to reflect solar heat gain.
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Example of an earth-sheltered home in hot climate Tempe, AZ uses the cooling properties of the ground to decrease cooling costs

Example of an earth-sheltered home in hot climate Tempe, AZ uses the cooling properties of the ground to decrease cooling costs
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Examples of Related Projects that Can be Done while Conducting a Roof Replacement or Bathroom Remodel

Examples of Related Projects that Can be Done while Conducting a Roof Replacement or Bathroom Remodel
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Exhaust duct only mechanically fastened and not sealed

Exhaust duct only mechanically fastened and not sealed
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Exhaust pipe should be made of smooth, rigid duct and any bends should be gradual, not sharp

Exhaust pipe should be made of smooth, rigid duct and any bends should be gradual, not sharp
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Exterior shading devices such as awnings or overhangs can significantly reduce cooling loads

Exterior shading devices such as awnings or overhangs can significantly reduce cooling loads
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External solar screens are an effective way to reduce solar heat gains through windows while maintaining view.

External solar screens are an effective way to reduce solar heat gains through windows while maintaining view.
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Extreme weather, such as wind, fire, flood, or extreme heat (included in the Severe Weather category above) causes most large electric disturbance events in the U.S (defined as affecting at least 50,000 customers) (data from 2000-2016)

Extreme weather, such as wind, fire, flood, or extreme heat (included in the Severe Weather category above) causes most large electric disturbance events in the U.S (defined as affecting at least 50,000 customers) (data from 2000-2016)
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed

Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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For better temperature distribution and air quality, every bedroom and all of the common spaces in this home have ducted returns to the central heat pump and all bathroom exhaust fans are controlled by a condensation sensor and timer switch.

For better temperature distribution and air quality, every bedroom and all of the common spaces in this home have ducted returns to the central heat pump and all bathroom exhaust fans are controlled by a condensation sensor and timer switch.
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Having both low and high ventilation openings is necessary to promote airflow from the stack effect

Having both low and high ventilation openings is necessary to promote airflow from the stack effect