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Zero Energy Buildings - "Zero" of What?

From: Denis Du Bois
Series: Energy Minute
Length: 01:24

Businesses looking for the absolute greenest of green for their next building will need to understand not only "zero energy building" but variations like net zero energy, zero energy carbon, and zero energy cost... here's how to sort them out. Pair this with an earlier Energy Minute titled "The Meaning of Zero." Read the full description.

E-minute-art-radio-300x_small "Zero energy" is a term we'll see applied to more and more buildings. It means the building produces as much energy on site as it uses. But that's not the whole story. There are variations like net zero energy, zero source energy, zero carbon energy, and zero energy cost... Learn how to sort them out, in a minute.

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Piece Description

"Zero energy" is a term we'll see applied to more and more buildings. It means the building produces as much energy on site as it uses. But that's not the whole story. There are variations like net zero energy, zero source energy, zero carbon energy, and zero energy cost... Learn how to sort them out, in a minute.

Transcript

"Zero energy" is a term we'll see applied to more and more buildings. It means the building produces as much energy on site as it uses. But that's not the whole story.

To be purely zero energy means not purchasing electricity or fuel, because all necessary power is generated on site all the time.

The term "net zero energy" means the building achieves that balance for the year, even though it buys grid power on some days, and on other days it sells excess energy back.

Then there's the question of where the purchases energy is measured. For a net zero site energy building, the purchased energy is measured at the meter. For a net zero source energy building it's measured at the generating station, so it accounts for the inefficiencies of transmission and distribution.

In a net zero energy cost building, the purchases and credits from imported and exported energy are a wash. It's a pu...
Read the full transcript

Timing and Cues

00:00 music up, IC: "It's the Energy Minute..."
01:24 OC: "...that's a whole 'nother story," music out

Related Website

http://energy-minute.com