Passive Ventilation Systems

Featuring the best passive ventilation systems in New Zealand

Every home needs ventilation systems for safety and comfort. Stale air not only causes difficulty breathing but may also grow more germs. Although there have been many advancements in technology for air circulation products, passive, also known as natural systems, remain an excellent option for homeowners. Only the best passive ventilation systems in New Zealand are featured on ArchiPro, an important part of a broader range of ventilation systems to consider for your home.

Advantages of using a passive ventilation system

Switching to natural ventilation methods not only reduces energy usage and lowers carbon footprints by allowing nature to circulate air without electricity, but it also significantly decreases energy bills by eliminating the need for mechanical systems to maintain comfort. Additionally, natural ventilation incurs lower maintenance costs than systems with complex ducts and fans, as it may only require the simple installation of an extra ceiling fan that homeowners can easily handle. Furthermore, using passive ventilation occasionally helps extend the life of HVAC appliances, which are typically taxed by constant use throughout the year. Moreover, natural ventilation enhances indoor air quality by bringing in fresh air and expelling pollutants along with stale air, creating a healthier environment within the home.

Types of passive ventilation systems

Cross ventilation

Utilises openings on opposite sides of a building to create airflow driven by wind pressure.

Stack ventilation

Relies on the principle that warm air rises, creating a natural upward airflow from lower to higher openings.

Single-sided ventilation

Uses windows or vents on a single side of a room or building to promote air exchange.

Night purge ventilation

Uses cooler nighttime air to flush out warm air accumulated during the day, reducing cooling loads.

Atrium ventilation

Central atriums act as a ventilation chimney, drawing air from surrounding spaces and expelling it at the top.

Solar chimney

A vertical shaft that uses solar energy to heat air creates an upward airflow to draw fresh air into the building.

Ventilated façade

An outer layer of the building envelope with an air gap that allows airflow driven by thermal buoyancy and wind pressure. 

How to choose a passive ventilation system

Choosing a passive ventilation system involves analysing several key factors. Consider the building layout and design to determine the best system, such as cross ventilation for open floor plans. Assess the local climate to decide if systems like stack ventilation or solar chimneys are appropriate. Evaluate occupants' needs and building usage, ensuring robust solutions for high-occupancy spaces. Factors in the building’s orientation relative to prevailing winds and sun exposure, and analysis of construction materials for their thermal properties. Consider maintenance requirements and the durability of components, opting for low-maintenance systems. Ensure compliance with local regulations and consider the aesthetic integration of the system into the building's architecture. Consulting with professionals can provide valuable insights for selecting the most suitable system.

Ongoing maintenance

Ongoing maintenance for a passive ventilation system is relatively straightforward and low-cost. Regularly inspecting and cleaning any vents or openings to ensure they remain unblocked by debris or dust is essential. Windows and other air inlets should be kept functional and clean to facilitate effective airflow. Additionally, checking for any structural changes or obstructions that could impact airflow, such as new furniture arrangements or construction, helps maintain the system's efficiency. Since passive systems have fewer mechanical components, there are typically no complex parts to maintain, making it an appealing option for those seeking a low-maintenance solution to indoor air quality.

Other ventilation products you might need

Simple and easy to use, passive ventilation systems are an excellent option for most homes. However, there are more options to consider, some of which might be more suitable depending on what you want. Those who want to prioritise humidity control should use a mechanical ventilation system, which prevents both excessive moisture and dryness. However, if you are looking for a solution to keep your office building warm during the winter months, you can install a heat recovery ventilation system, a system that constantly supplies fresh air.