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Air Conditioning and Mechanical Contractors Association of Australia (AMCA)
Address : 30 Cromwell Street
City : Burwood
State : Vic
Zip : 3125
Country : Australia
Phone : (03) 9888-8266
Fax : (03) 9888-8459
Website : http://www.amca.com.au
Contact Person : The Secretary
Association Information
Association Activity : Bill Harrison, the incoming president of ASHREA recently addressed a meeting of mechanical contractors in Desert Springs, California, on energy consumption in commercial buildings.

He went on to outline what he intends to do about this problem during his presidency and the opportunities that are opening up for mechanical contractors.

"ASHRAE today is guided by a strategic plan with four directions.

The first is that ASH RAE will lead the advancement of sustainable building design and operation. That is the direction that will have the most impact on MCAA members, both those that construct and maintain buildings. For ASH RAE, sustainability means reduced energy with good indoor environmental quality.

Sustainable construction has a lot of momentum today. We are all aware of the growing influence of the sustainability rating programs, LEED and Green Globes. The energy bill passed in late 2007 requires the federal government to immediately reduce the amount of energy used in their buildings and to begin constructing net zero energy buildings by the year 2030.

ASHRAE is committed to provide design guidance for net zero energy buildings by 2020.

Frankly, I thought net zero energy was a pipedream until I started to work with the engineers at the National renewable Energy Lab. When the AIA adopted a position statement calling for their members to move toward net zero energy design it was a significant statement because those designs will have much more expensive mechanical systems. Congress then continued the rush toward net zero by passing the Energy Bill.

Where are we today? The latest Commercial Building Energy Consumption Surveyor CBECS data is from 2003. That data indicates that a typical commercial building in the US uses 91,000 btu per square foot per year. Buildings designed using ASHRAE Standard 90.1 should use about 70,000 btu per square foot per year, and buildings designed with the best technology available today will use about 40,000 btu per square foot per year.

A net zero energy building is defined as a building which on an annual basis produces as much power through renewable energy as it consumes. To get to a net zero energy level today then will require renewables to provide an average of about 40,000 btu per square foot per year. That is easy to do if you have a large single story building but impossible in many urban settings.

What we all want is commercially viable net zero energy buildings and they are still in the future.

Studies done at the National Renewable Energy Lab indicate that if life cycle costing is used, the lowest cost scenario is for a building about 30% better than code. For the same life cycle cost as a base case building, you can build a building about 50% better than code. Net zero energy buildings are still considerably more expensive.
 
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