Combining passive stack ventilation with heat recovery and system intelligence.


Combining passive ventilation,
heat recovery and system intelligence.

Ventive Windhive® is a passive stack ventilation system with intelligence at its core. Combining passive ventilation, heat recovery and system intelligence to supply up to 200 litres of fresh air every second. It adapts to real-time conditions to deliver an optimal balance of ventilation and comfortable temperatures, whatever the weather.

Ventive Windhive® is the ideal passive ventilation system for schools, commercial buildings and large domestic homes.

natural ventilation

100% fresh air

Windhive® is a pure natural ventilation system, meaning it only supplies fresh air into rooms. It does not mix in stale contaminated air like other systems.

natural ventilation

Heat recovery

Windhive® offers heat recovery of up to 72% efficiency and secure night-time purging to help regulate room temperatures at zero energy cost. Each unit is designed to save 1,600kWh per year on average, based on monitoring and IES modelling.

natural ventilation

Silent operation

Windhive® has no noisy fans or motors, giving occupants the silence and fresh air required for full concentration. Testing has shown it reduces external noise by an average of 45% (link)

natural ventilation


Once installed, Windhive® connects automatically to the Ventive cloud to enable remote commissioning, real-time performance monitoring and proactive maintenance. Available as standard, connection is made via a GSM network to ensure security, simplicity and savings. Learn more about Ventive Connectivity (link)

natural ventilation

Year-round comfort

Windhive® adapts to the external environment automatically, delivering optimal comfort. Passive cooling and night-time purge modes minimise risk of summer overheating, while heat recovery mode in winter significantly reduces energy bills.

natural ventilation

Seamless design

We design, specify and manufacture each Windhive® unit to be perfect for your specific project. We can update performance parameters to suit changing requirements.

How does Ventive Windhive work?

Passive Ventilation with Heat Recovery (PVHR™) is a patented method of delivering high thermal efficiency and consistent air flow using natural ventilation systems by securely transferring the heat from exhaust air to fresh incoming air. Windhive® is a 3rd generation PVHR design, offering a 35% uplift due to a fully integrated design.

The Ventive Windhive® has a number of sensors that constantly monitor the temperature and air quality within the room. The sensors communicate with the system’s actuators to adapt performance to changing conditions in real time. You can set custom parameters based on your own requirements, and later tweak them based on real life performance data. Windhive® is capable of the following operation modes:

Windhive-Full heat recovery

Full heat recovery

Windhive® passes 100% fresh air through pure natural ventilation. The PVHR method ensures there are no cold draughts, reducing heat loss by up to 72%. In winter the dampers close to produce an airlock and ensure heat is retained overnight.

Bypass mode

Bypass mode

Windhive® dynamically adjusts to sensor data from the classroom to provide an optimal balance of heat recovery with air quality. This can change multiple times during the day as occupancy levels vary.

Bypass mode

Passive cooling

During warm conditions Windhive® engages in secure night-time purging. Supplying fresh air through a wall louvre, the windhive actuators open all three roof dampers to create negative pressure and draw warm air out of the room. Capable of 4 air changes per hour, this method can reduce temperatures overnight by up to 10°c.

Bypass mode

Active cooling*

Windhive® cools down incoming summer air to prevent overheating during occupied hours. It passes through the Heat Exchanger to transfer heat away to exhaust air, before flowing in to the classroom.

*with an optional heat pump

Visualisation of 3 key performance points

Specifications Performance

Heat Recovery: 0W, up to 72% heat recovery efficiency

Night time cooling: 0W

Daytime cooling: Up to 2.2kW thermal output

BREEAM credits: Up to 6 (Hea02, Ene01, Ene04)

Design & installation

From initial planning drawings to full installation design, we provide dedicated support for your project, complete with on-site commissioning. Contact us today with details of your project and we can provide thermal performance modelling, IES reports and advice on how the right ventilation strategy can help your design goals. At Ventive we model, specify and manufacture each system to suit your project’s specific requirement. All our systems are fully monitored following commissioning so we can remotely update the performance parameters of your building to suit changing requirements.

Windhive® can be integrated with ease into any roof type with no need for unsightly upstands or internal boxing. Two styles are available – smooth (rounded) and sharp (squared).