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To ensure a healthy and comfortable indoor climate, it is crucial that buildings are properly ventilated. Ventilation plays a central role in delivering fresh air to occupants and users while removing moisture, harmful substances, and other pollutants from indoor air.
Without effective ventilation, the concentration of these pollutants can rise to levels that can lead to health problems, discomfort, and even damage to the building’s structure over time. Therefore, it is not only important but necessary to understand and follow the requirements for ventilation systems. Properly sized and maintained ventilation systems ensure not only an optimal indoor climate, but also contribute to energy efficiency and the long lifespan of the building.
To ensure that ventilation systems function optimally and provide a healthy indoor climate, it is necessary to comply with a number of regulations and standards. These requirements are designed to ensure that the ventilation effectively removes pollutants, delivers sufficient fresh air, and does so in an energy-efficient manner.
Ventilation systems must comply with the current rules in the Building Regulations (BR18). These rules set requirements for air quality, air exchange, and energy efficiency to ensure an acceptable indoor climate in both residential and commercial buildings.
In addition to the building regulations, ventilation systems must also comply with several Danish standards that specify detailed guidelines for the design, installation, and maintenance of the systems:
DS428: This standard addresses fire safety measures for ventilation systems and ensures that the systems are designed to prevent fire spread.
DS447: This standard sets guidelines for the design, installation, and maintenance of ventilation systems, ensuring that the systems are correctly sized and function efficiently.
DS452: This standard focuses on the thermal insulation of technical installations, including ventilation ducts, to minimize heat loss and condensation, thereby contributing to energy efficiency.
Eco-design directive (2009/125/EC):
EU’s F-gas Regulation:
The EU Parliament has adopted a new F-Gas Regulation, which has come into force, meaning stricter requirements for phasing out environmentally harmful refrigerants and a shift towards natural refrigerants. Here are the key points for air handling units:
Ban for january 1. 2027: Fluorinated greenhouse gases with a GWP over 150 will be banned in integrated cooling systems and heat pumps.
Ban from january 1. 2032: No fluorinated refrigerants in integrated cooling systems and heat pumps for systems under 12 kW. For systems over 12 kW, the GWP must not exceed 150.
When choosing a ventilation system for a building, it is crucial that the system complies with the building regulations, Danish standards, and the EU’s Eco-design Directive. Choosing the right ventilation system is not only important to ensure compliance with the legislation but also to guarantee a healthy and comfortable indoor climate for the building’s users.
A correctly sized and installed ventilation system ensures sufficient air exchange, preventing the buildup of harmful substances such as CO₂ and moisture. Additionally, energy-efficient ventilation systems help reduce energy consumption and, thus, operating costs. By choosing systems designed to minimize the emission of F-gases, one can also reduce environmental impact and comply with future refrigerant usage requirements. This ensures both economic and environmental benefits in the long term.
At Unic Air, we provide customized air handling units, that comply with all applicable regulations and standards. We work closely with our customers from the idea and design phase to ensure the optimal solution for the entire building.
Our air handling units are Eco-design approved and future-proofed, as we use CO₂-integrated cooling with a Global Warming Potential (GWP) of 1. This means they are not affected by the phase-out rule for environmentally harmful refrigerants.
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