Water is a far better medium for energy transfer, delivering unparalleled efficiency, lower operational costs, and a dramatically reduced carbon footprint compared to refrigerant-based (VRF) systems. It’s a technology that not only optimizes climate control, but also aligns with modern sustainability goals.

The future of HVAC isn’t about making compromises — it’s about achieving the perfect balance of comfort, efficiency, and responsibility. Hydronic fan coil systems do just that.

01 Water is more energy efficient

Water is a better medium for transporting energy compared to VRF systems. It carries significantly more thermal energy per unit volume than air, so less energy is needed to heat or cool the space. This reduces operational costs and energy consumption.

According to Armstrong Fluid Technology, hydronic systems offered energy savings of 57% to 84% compared to VRF systems installed in the same building and addressing similar loads. This indicates that water has a better ability to retain heat or coolness, which allows for quicker and more responsive climate control.

02 Water offers more flexibility

Water-based fan coils offer exceptional flexibility, as HVAC system components can be sourced from different manufacturers, making design and replacement easier. This means greater customization and adaptability across all types of applications.

Unlike VRF systems, which require proprietary parts and matching components, water-based systems use open communication protocols that support seamless integration. Water fan coils offer scalability without being locked into a single brand, reducing cost, complexity, and compatibility issues.

03 Easy to install & maintain

Water-based fan coil systems provide a more straightforward and cost-effective alternative to VRF systems, particularly in terms of installation and maintenance. Unlike VRF, which requires certified technicians to handle refrigerants and comply with regulations, hydronic fan coils follow standard installation practices. This makes them easier to install and more affordable, ideal for large-scale developments, new builds, or remote sites where specialized labor is scarce.

Maintenance is also straightforward, as individual fan coil units can be swapped out easily without impacting the rest of the system. In contrast, replacing a failed VRF indoor unit often triggers multiple upgrades due to changing refrigerant regulations.

04 Water is sustainable

Using water eliminates the need for refrigerants inside the building, reducing greenhouse gas emissions. Refrigerants account for approximately 12% of annual household energy and if mishandled, pose a serious global warming risk.

Unlike refrigerant-based fan coils, which require frequent replacement to stay compliant, water-based systems are exempt from such restrictions, making it a more future-proof solution.

Additionally, it’s non-toxic, non-flammable, and renewable, with no environmental regulations, making it a safer and more sustainable option.

05 Water is more reliable

Water-based fan coils contribute to the longevity and reliability of the entire HVAC system. They tend to have fewer moving parts compared to traditional forced-air/VRF systems, resulting in less wear and tear over time.

Additionally, water-based fan coils are less susceptible to corrosion and mechanical failure, thereby extending the equipment’s lifespan and reducing maintenance costs.

Water is also infinite. It remains unchanged, ensuring long-lasting and reliable solutions. For Polar Air customers, this means enjoying consistent climate control year after year with minimal disruption and fewer service calls.

06 Indoor air quality

Water-based systems improve indoor air quality by minimizing the circulation of dust and allergens. This results in a healthier and cleaner environment.

Additionally, they help maintain consistent humidity levels, further enhancing comfort and air quality.

Conclusion: water is a better tech for fan coils

At Polar Air, we believe smart HVAC should be efficient, sustainable, and built for comfort. That’s why we’re big on water-based systems. Hydronic fan coils use the natural power of water to heat and cool spaces more cleanly, without the environmental baggage of refrigerants. In a world that needs better climate control, our systems keep things simple and sustainable.

With Polar Air, you’re choosing a smarter way to stay comfortable, because your indoor climate should feel just right, without compromising the planet.