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Demand controlled ventilation

Demand controlled ventilation (DCV) is an intelligent ventilation system that adjusts the airflow and indoor climate parameters based on the needs of each separate room in the building. With a healthy indoor climate, productivity and well-being are increasing. It will also reduce the energy used by the system, which result in major cost savings.

Where to use it

DCV is beneficial in buildings where the activity level varies. The rise of hybrid workplaces has turned a traditional office into a place that can be crowded one day and almost empty another day. In schools, classrooms are used part of the day, sometimes with a full class, sometimes with only a few students in the room. Gyms, apartments and restaurants are other examples of where the activity level varies over the day. With DCV, the ventilation system will adjust itself based on how the building is used.

How it works

Traditional ventilation systems have a constant airflow to a room regardless if it is in use or not. Such system is called CAV (orange line in the chart). More advanced ventilation systems might have a variable airflow during the day, called VAV. It reduces and increases the airflow based on when the building normally is used, according to a predefined schedule or motion sensors (grey line in the chart). 

A DCV system is using sensors to register where people are located in the building in combination with monitoring of the air quality in the room. It works in the background and directs the airflow to the part of the building that needs it the most (blue line in the chart).

What it means

In our example, we have calculated the energy used in a 200 sqm office with people coming and leaving during the day. The actual saving differs from building to building and from situation to situation, but the chart gives an idea of how great the impact actually is. In our example, the energy used for a CAV system is five times higher than the energy used for a DCV system. 

You will not only save energy but also improve the air quality with a DCV system. Better air quality means higher productivity and improved well-being for people in the building. A winning combination.


Lindab Regula - Room control ventilation

A Lindab unit, preferred sensors, and our room system controller Regula Combi gives you Demand Controlled Ventilation at room level. Connect everything in a system and you have Lindab Regula. 

Up to 70 percent savings

In this case study, the building owner had a clear goal when starting to optimise the ventilation system - to reduce energy consumption. Aside from the fact that a survey showed substantial improvement in indoor climate satisfaction, the annual energy costs of the system resulted in a reduction of 73 percent compared to the old system and a calculated ROI of merely 4,5 years. 

DCV One in new buildings

Lindab has DCV offerings for both new buildings and renovation. For new buildings, DCV One is a good choice. DCV One is combining several components in one unit. It's an integrated room controller and diffuser at the same time. Add the Pascal System management on top of that and you'll have a centralised access point and full control of your ventilation system.

Ultra BT for renovation

Ultra BT makes the upgrade of the ventilation system easy. It can be installed in one room at a time, with minimal impact on the building. No reconstruction of walls, no shut down of the office. Ultra BT is installed in existing ducts and everything is connected via Bluetooth. No wires required.

Sustainability certifications

It's not sustainable to ventilate with full airflow around the clock. To achieve building certifications such as BREEAM and LEED, a smart and efficient ventilation system is required. Lindab offers a wide range of products that are aligned with the certification requirements.