Designed for Efficiency.
The ECO Heat Recovery Unit (ECO-HRU) range from Stax VPS offers high-performance ventilation systems engineered to deliver maximum energy efficiency, space-saving design, and robust reliability. Manufactured in the UK, these units support a wide airflow range from 0.05 to 1.00 m³/s, making them suitable for small to medium commercial HVAC applications.
With an outstanding thermal efficiency of up to 95%, the ECO-HRU helps achieve compliance with Part L2 Building Regulations while reducing energy costs significantly.
Key Features at a Glance
Airflow Range: 0.05 – 1.00 m³/s
Heat Exchanger Efficiency: Up to 95% (BS EN 308)
Mounting Options: Internal or External
Access Options: Top, Bottom, or Side
Low Profile: Starting at 310mm in height
Control Options: Standalone controller with smartphone integration
Optional Add-ons: CO₂ and PIR sensors, shut-off dampers, acoustic enhancements
Construction & Durability
Each unit features a frameless, double-skinned case constructed from galvanised steel panels filled with 25mm high-density mineral wool insulation. The units meet rigorous build quality standards in accordance with BS EN1886:2007, including:
- Case Strength: D1
- Case Leakage: L2
- Thermal Transmittance: T3
- Thermal Bridging: TB4
Access panels are equipped with grab handles and screw fixings to ensure easy maintenance and secure operation.
Acoustic Performance
The ECO-HRU is designed for low-noise operation. Optional enhancements include:
Full acoustic spectrum data available for all models
Acoustic lining to reduce breakout noise
Standard or bespoke attenuators to meet low NR (Noise Rating) levels
Heating & Cooling Options
Stax VPS provides multiple integrated heating and cooling modules, all matching the high build standards of the main unit:
- LPHW Heating – Copper tube with bonded aluminium fins
- Chilled Water Cooling – For 6/12°C flow/return systems
- Electric Heating – Mineral insulated Incoloy 800 elements with safety cut-outs
- DX Heating/Cooling – Compatible with external DX condensing units
- Reverse Cycle Heat Pumps – Combined heating/cooling solution
All modules can be directly mounted and are available for internal or external installations.
Intelligent Controls
At the heart of the ECO-HRU system is the E-Tech Controller, a powerful, expandable control system designed specifically for energy-efficient air handling:
Optional terminal box for simplified installation (IP67 rated)
Supports BACnet and Modbus
Up to 2060 Digital I/O and 511 Analogue I/O ports
0–10V control for heating/cooling elements or BMS integration
Smartphone control via companion app
Model Overview & Selection
Stax VPS provides multiple integrated heating and cThe ECO-HRU range consists of seven base models:
- ECO-HRU-01 to ECO-HRU-05 – For standard airflow needs
- ECO-HRU-06-1 and ECO-HRU-06-3 – Higher-capacity models with rectangular silencers and enhanced performance
Each unit comes with specific dimension, weight, and performance characteristics, ensuring you can select the perfect fit for your project requirements.
A unique unit coding system is available to help specify your required configuration quickly and clearly.
External Mounting & Weatherproofing
Units designed for external installation feature:
Optional weatherproof cowls and external acoustic treatments
Double-pitched roofs and channel bases as standard
Polyester powder coating
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