26 Aug '16, 8am

AECB member Robert Cohen discusses Nearly Zero Energy Buildings in latest Soapbox

There is a third perspective needed to complete the NZE definition: how close to zero is ‘nearly’. Stakeholders might expect NZE buildings to be approaching zero energy use on a scale that covers the full range of performance for the applicable building type. Australia offers a template, fully-proven for the operational performance of office buildings and critically making allowances for a building’s hours of use. The NABERS[4] scale for rating office ‘base building ’ energy performance has eleven points from one to six stars, with half stars between the whole stars. The scale was calibrated in 1999, when 15% of buildings performed poorer than 1 star, average base building performance was 2.5 stars and 4 stars was best practice. Today, the stock average rating is 4.2 stars, while nearly all new offices achieve at least 4.5 stars, most reach 5 stars or better, and a few are...

Full article: http://www.aecb.net/nearly-zero-energy-buildings-emperors...

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