HVAC Case Study
Mount Barker High School

Project Requirements

Provide a cooling solution to the school’s Home Economics building that:

• Delivers specified temperature and comfort levels in periods of peak load
• Meets outdoor air requirements to AS 1668 part 2 for large volumes of people
• Accommodates existing power infrastructure

Challenge

The project’s main challenges included:

• Cooling an open space that contains multiple cooking equipment with exhaust air being expelled from the building
• Sizing of an air conditioning packaged system required 80 kW of total cooling for the space
• Limited power supply to the building, defer costly electrical upgrade

Solution

The Climate Wizard CW-80 was able to service the space and satisfy all project requirements, supported by a Hot Water Coil for heating and an automatic controller. The main power supply to the Climate Wizard only had to accommodate a 10kW load, not the 40kW load for the Air Conditioning Packaged (DX) System. This meant the power sub-board did not need upgrading, saving much needed funds for the school. The air conditioning system now maintains a comfortable and cool 24^oC in the building, with no added moisture in the air, even during extreme weather events where it can reach in excess of 40^oC outside.

Benefits

Since the installation and commissioning of the CW-80, the school has experienced the following benefits:

• Significantly reduced running costs (up to 80%) to cool the space compared to an equivalent reverse cycle system
• Supporting student and staff well-being – improved Indoor Air Quality (IAQ) as 100% outside air is cooled and supplied to the space
• Temperatures and comfort levels similar to reverse cycle systems, with cooling performance increasing as temperatures rise
• Contributing to reducing the school’s carbon footprint, supporting public infrastructure green building requirements
• Exceeds minimum O/A requirements from Australian Standard AS1668.2