Alnor HRU-PremAIR-500 Heat Recovery Unit with Constant Flow
The HRU-PremAIR-500 is the premier model in the series, engineered for maximum performance in large residential properties and commercial applications. It delivers a substantial airflow of 500 m³/h at 100 Pa, with the key advantage of an integrated Constant Flow (CF) system. This intelligent technology guarantees that design airflows are maintained consistently over time. Housed in a durable, lightweight EPP casing and featuring a high-performance aluminium heat exchanger, this unit is the ultimate solution for demanding projects requiring reliability and smart control.
Core Technical Advantages
Guaranteed Airflow with Constant Flow (CF): Proactively compensates for changing system pressure (e.g., filter clogging) to maintain a stable, commissioned airflow, ensuring optimal performance throughout the unit's life.
Maximum Ventilation Capacity: The 500 m³/h airflow makes it the ideal choice for large, multi-room homes and light commercial spaces.
High-Efficiency Aluminium Exchanger: The robust counterflow aluminium heat exchanger provides excellent thermal performance, achieving a certified efficiency of 81.5% according to EN 13141-7.
Automated Climate Management: Features a fully modulating by-pass for intelligent free-cooling in summer and free-heating in transitional seasons, maximising energy savings and comfort.
Installer-Friendly Design: Despite its power, the unit is lightweight at only 35 kg and comes complete with wall mounting racks and feet for a secure and efficient installation.
The Constant Flow (CF) Advantage
Standard ventilation systems can lose performance as filters become dirty or condensation forms in the exchanger. The Constant Flow system is designed to eliminate this problem, providing peace of mind for both installers and end-users.
How it Works: The CF system continuously monitors pressure within the ductwork and automatically adjusts fan speeds to counteract any increase in resistance.
Installer's Guarantee: Ensures that the specified airflow rates are consistently delivered, guaranteeing system performance and compliance long after commissioning.
User's Benefit: Provides sustained, high-quality indoor air and ensures the heat recovery system operates at its intended efficiency, preventing under-ventilation and energy waste.
Technical Specifications
Technical Data for HRU-PremAIR-500
Parameter
Value
Maximum Air Flow
500 m³/h (@ 100 Pa)
Thermal Efficiency (EN 13141-7)
81.5%
Maximum Power Consumption
220 W
Sound Power Level (LWA)
49 dB(A)
Weight
35 kg
Heat Exchanger
Counterflow (Aluminium)
Filters (Standard)
ISO Coarse 70% (G4)
Built-in RH Sensor
Yes
Dimensions (W x H x D)
730 x 906 x 502 mm
Advanced Wireless Control & Connectivity
The HRU-PremAIR-500 is equipped with an advanced control system for ultimate flexibility and ease of use.
Complete Remote Operation: Connect the unit to the internet via Wi-Fi for full control and real-time monitoring through the dedicated mobile app or any web browser.
Automated Air Quality Control: Pair the unit with wireless CO₂ and RH sensors to enable demand-controlled ventilation that responds automatically to changing indoor conditions.
Seamless Integration: Designed for effortless integration with modern smart home and building management systems.
