The energy transition is accelerating the adoption of increasingly sustainable technologies in the HVAC sector. Among these, heat pumps using natural refrigerants are taking on a central role thanks to their ability to combine high energy efficiency with a reduced environmental impact. In particular, propane (R-290) is emerging as one of the most promising refrigerants for commercial and industrial applications. Its near-zero Global Warming Potential (GWP) and high energy performance make it an ideal solution to support European decarbonization goals, in line with the evolution of F-gas regulations. However, selecting a propane heat pump cannot be based solely on energy performance. As propane is classified as a highly flammable refrigerant (A3), it requires a specific and integrated approach to safety from the very earliest stages of system design.

Why Is Safety a Key Element in Propane Heat Pumps?

The use of natural refrigerants creates new opportunities, but also new responsibilities for designers, installers, and plant operators.

When evaluating a propane heat pump, it is important to consider not only the unit's efficiency, but also aspects such as:

• Mitigation of risks associated with refrigerant flammability;
• Compliance with applicable regulations;
• Long-term system reliability;
• Safe management during transportation, installation, operation, and maintenance.

In this context, a concept that is becoming increasingly important within the industry is Safety by Design.

Safety by Design: Integrating Safety from the Very Beginning

The Safety by Design philosophy ensures that safety is not treated as a requirement to be checked once a project is complete, but rather as an element fully integrated from the earliest stages of product development.

This approach is based on the combined adoption of:

• Dedicated engineering solutions;
• Multiple and redundant protection systems;
• Continuous monitoring of operating conditions;
• Specific installation and maintenance procedures.

The objective is to reduce risk at its source by creating systems capable of ensuring high safety standards throughout the entire lifecycle of the installation.

Daikin Safety Shield: A Structured Approach to Risk Management

To address the specific requirements of propane applications, Daikin Applied Europe has developed Daikin Safety Shield, a safety configuration specifically designed for heat pumps using natural refrigerants. This approach goes beyond simple regulatory compliance and introduces a structured risk management strategy that supports the unit throughout every phase of its lifecycle.

Daikin Safety Shield is built around four fundamental pillars:

• Electrical Panel Safety
• Compressor Protection
• Safe Refrigeration Circuit Design
• Certified Commissioning

The latter includes inspections, functional testing, and safety checks carried out by qualified personnel, with the objective of ensuring proper installation, regulatory compliance, and safe unit commissioning.

Which Features Make a Propane Heat Pump Safer?

When evaluating an A3 refrigerant solution, certain design features can make a significant difference in terms of safety.

Among the measures implemented within the Daikin Safety Shield approach are:

• Limiting the refrigerant charge to a maximum of 5 kg per circuit;
• Dedicated tanks for transportation and maintenance operations;
• Leak detection systems;
• Water separation within the compressor compartment;
• Components designed to direct any refrigerant leaks toward safe areas.

The integration of these solutions helps create consistent and repeatable safety standards, both in unit design and in installation and service activities.

Safety as an Enabler of Decarbonization

The growing adoption of natural refrigerants represents a key milestone in the decarbonization journey of the HVAC industry. However, the success of this transition does not depend solely on the adoption of efficient technologies.

Achieving tangible results requires a combination of technological innovation, specialized expertise, and effective risk management throughout the entire lifecycle of the installation.

Particularly in sports applications, where service continuity, user protection, and operational reliability are essential requirements, safety becomes just as strategic as energy efficiency.

How to Choose a Propane Heat Pump?

Beyond evaluating performance, efficiency, and sustainability, it is important to ensure that the selected solution incorporates a structured approach to safety.

The presence of systems designed according to Safety by Design principles, certified commissioning procedures, and dedicated risk mitigation measures can help ensure safer and more reliable plant operation over the long term.

Are You Considering a Propane Heat Pump for Your Next Project? Contact Daikin experts to learn more about the available solutions and identify the technology best suited to your application requirements.