NCC 2022 Improving Building Performance

Australia's building standards are advancing with the 2022 updates to the National Construction Code (NCC), which focuses on improving energy efficiency, managing condensation, and enhancing overall building performance. Effective 1 May 2024, these changes highlight the critical role of mechanical ventilation in today's airtight buildings. Here's what you need to know.

The 2022 NCC introduces several significant updates aimed at improving building performance and indoor air quality. The code now mandates that exhaust systems in sanitary compartments, laundries, kitchens, and bathrooms must discharge air outside the building rather than into roof spaces. This helps prevent the accumulation of moisture and contaminants within the building structure. Additionally, bathrooms lacking sufficient outdoor air access must have exhaust systems that automatically activate with the lights and continue to operate for ten minutes after the lights are turned off. If outdoor air access is limited, make-up air must be sourced from another room to ensure adequate airflow throughout the building.

Condensation Management
New requirements are designed to minimise condensation issues, particularly in cooler climates where moisture buildup is more likely. This may involve the installation of roof ventilation systems. Certain bushfire-prone areas may be exempt from specific ventilation requirements to balance safety concerns with ventilation needs.

Energy Efficiency and Whole-of-Home Budget
Homes are now required to meet an annual energy use budget that covers heating, cooling, hot water systems, and other major energy consumers. This encourages the integration of more efficient insulation, solar panels, and ventilation strategies to reduce overall energy consumption.

Why Airtight Buildings Need Mechanical Ventilation
While the new NCC standards for thermal insulation and air tightness are excellent for energy efficiency, they can restrict natural ventilation, increasing the risk of condensation and mould growth. These issues not only pose health risks but can also lead to costly structural damage.

The Challenge of Condensation
Condensation occurs when warm, moist air comes into contact with cooler surfaces, causing moisture to accumulate. In highly insulated buildings with limited natural ventilation. It's important to remember the potential risks associated with moisture buildup in buildings. Mould growth is a serious health hazard that can lead to respiratory issues and other health problems. Additionally, structural damage caused by moisture can result in costly repairs and compromise the integrity of the building materials. Therefore, it's crucial to address moisture issues promptly to safeguard both the health of occupants and the structural integrity of the building.

How STIEBEL ELTRON Can Help
STIEBEL ELTRON offers advanced mechanical ventilation systems designed to meet the requirements of the NCC 2022 and address the challenges of airtight buildings.

Our ventilation systems are designed to provide controlled ventilation, ensuring continuous air exchange to prevent condensation and maintain indoor air quality. They are also optimised for energy efficiency, minimising energy loss while effectively ventilating the space. Additionally, our systems offer smart integration, seamlessly blending with existing building designs to enhance comfort and ensure compliance with regulations.

Looking Ahead
The 2025 NCC update is expected to further enhance energy efficiency, safety, and sustainability in building practices. Proposed changes include stricter thermal performance requirements for commercial buildings, enhanced fire safety measures, and support for electric vehicles. Public consultation on these changes is open until 1 July 2024, allowing stakeholders to provide feedback.

As building standards continue to evolve, understanding the importance of mechanical ventilation in airtight buildings is crucial for creating healthy and efficient living environments. STIEBEL ELTRON's mechanical ventilation systems are designed to meet these needs, ensuring comfort, energy efficiency, and compliance with the latest codes.