In New Zealand, windows are not just a design element — they play a critical role in home safety, comfort, and energy efficiency.
To ensure product performance, several New Zealand Standards (NZS) exist, with NZS4211, NZS4233, and NZS4666 being the most widely referenced.
1. NZS4211: Residential Window Performance
NZS4211 is the foundational standard for residential windows, focusing on:
Structural integrity – windows remain stable under wind and impact;
Air and water tightness – ensuring insulation, preventing leaks;
Operational performance – smooth opening and closing over time.
Simply put, NZS4211 ensures that windows can be safely used in New Zealand homes, providing long-term reliability.
2. NZS4233: Commercial Window Safety & Durability
NZS4233 targets commercial applications, such as offices, retail, and public buildings:
Focuses on heavy-use durability;
Includes wind pressure, impact resistance, air/water tightness testing;
Ensures long-term structural reliability under frequent operation.
Developers of commercial projects prefer NZS4233-certified systems for longevity and reduced maintenance risk.
3. NZS4666: Aluminium Systems & Sliding Windows
NZS4666 applies to aluminium window systems and sliding doors/windows:
Ensures aluminium frame design and durability;
Verifies smooth sliding operation and sealing performance;
Confirms wind, water, and structural performance for slim-frame or floor-to-ceiling sliding systems.
For modern homes and sunrooms, NZS4666 ensures both aesthetic minimalism and functional safety.
4. Choosing NZ Standards
Residential homes – prioritize NZS4211 for basic safety and comfort.
Commercial or high-traffic locations – NZS4233 ensures durability.
Modern homes, sunrooms, or sliding systems – NZS4666 guarantees performance for aluminium sliding systems.
Selecting a manufacturer that meets these NZS standards means your windows are safe, durable, energy-efficient, and visually appealing.
M&C Windows & Doors
NZS4211 · NZS4233 · NZS4666 Certified
Factory Direct · Auckland Local Installation Service
— Bringing standards to life, ensuring homes are safe and comfortable.