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How many air quality sensors do you need per building?

When organizations start working with indoor air quality, the same question often comes up: how many sensors are actually needed? Too few sensors create blind spots – too many increase costs without adding real insight.

This guide shows how to size your setup intelligently based on layout, room type, and ventilation zones – not just square meters.

Quick takeaways from the article

✓ Start with the layout – understand floors, open areas, and meeting rooms
✓ Room type matters more than size – small meeting rooms may need dedicated sensors
✓ Align with HVAC zones – for better ventilation and more consistent comfort

When do you need more – or fewer – sensors?

In open office environments with uniform ventilation, a small number of sensors may be enough. But in buildings where occupancy varies, or where ventilation is divided into multiple zones, more measurement points are often needed to avoid over- or under-ventilation.

The article also explains how desktop solutions and cloud-based systems influence planning, and provides simple rule-of-thumb tables for offices, schools, healthcare, and restaurants.

A building does not need sensors everywhere , it needs sensors where air quality actually changes.

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