Hitachi Hydro Free High Temperature Hydrobox

Product Overview: At a Glance

The Hitachi Hydro Free High Temperature Hydrobox (RWHT-5.0VNF1E) delivers up to 16kW of high-temperature water heating when paired with compatible VRF outdoor units. Designed for efficient domestic hot water and heating, it is perfect for renovation projects or commercial applications requiring reliable high-temperature output.

Key Features & Benefits

• High-temperature heating - produces hot water up to 80°C without requiring an anti-legionella cycle
• 16kW output - single-box solution suitable for domestic and light commercial use
• Integrated DHW production - constant or timed hot water supply when paired with VRF Sigma or SET FREE Mini systems
• Smart cascade operation - secondary R134a cycle activates only when inlet ≥30°C or outlet ≥45°C for energy efficiency
• Compact and efficient - space-saving design ideal for plant rooms and renovation projects
• Versatile VRF integration - compatible with 2/3-pipe VRF Sigma or SET FREE Mini systems
• Energy recovery - utilises waste heat from cooling operations for hot water production

Typical Applications & Use Cases

Ideal for commercial or residential environments needing high-temperature hot water, such as gyms, IT suites, or renovation projects. The Hydro Free system provides both heating and domestic hot water from a single module, optimising space and energy efficiency.

Technical Overview

The Hydro Free High Temperature Hydrobox integrates with Hitachi VRF systems to deliver up to 16kW of hot water heating. It operates with R410A and R134a cycles to maintain high temperatures up to 80°C efficiently. Suitable for environments where cooling demand produces excess heat, this unit maximises renewable energy use and ensures consistent hot water availability.