Heat recovery ventilation systems are a core element of advanced HVAC design — combining energy efficiency with superior indoor air quality. By recovering thermal energy from exhaust air and transferring it to the incoming fresh air, these systems maintain optimal indoor comfort with minimal heat loss. As energy costs rise and environmental concerns grow, ventilation units with heat recovery have become essential in both new builds and retrofit projects.
At Alnor we engineer and manufacture high-performance systems that meet the needs of modern construction. Our energy-efficient ventilation solutions are developed in-house using advanced testing facilities and proven technologies, ensuring consistent performance, durability, and long-term savings. With over 30 years of experience and international certifications, Alnor stands as a trusted partner for HVAC professionals across Europe.
A heat recovery unit (HRU) is a key component of mechanical ventilation with heat recovery, designed to optimize thermal energy use in controlled environments. Instead of releasing warm indoor air to the outside, an HRU captures this heat through a heat exchange ventilation process and uses it to warm the incoming air — without mixing airstreams.
Depending on project needs, Alnor systems feature crossflow, rotary, or highly efficient counterflow exchangers, with thermal recovery rates of up to 90%. These units are further enhanced with multi-stage filters that remove particulate matter, allergens, and pollutants — making the entire air recuperation system both energy-saving and health-focused.
The benefits of heat recovery ventilators apply across industries and sectors. For homeowners and developers, residential heat recovery systems ensure stable indoor temperatures, healthier living spaces, and lower energy bills — especially in energy-tight homes or flats.
In commercial spaces such as offices, schools, and healthcare facilities, commercial ventilation solutions provide fresh air without heat loss, supporting employee well-being and regulatory compliance.
For industry, large-scale systems help maintain air quality and reduce operational costs in high-demand environments. Meanwhile, single room heat recovery ventilation offers a perfect fit for compact rooms, renovations, or decentralized applications where ducted systems are impractical.
Alnor's systems combine top-tier performance with measurable financial impact. Thanks to heat exchangers capable of reclaiming up to 90% of thermal energy, energy savings with HRV are immediate and substantial. Buildings equipped with HRV units can see heating demand reduced by 25–40%.
Although heat recovery ventilation system costs vary by scale and specification, the typical return on investment ranges from 3 to 5 years — often faster when factoring in grants, tax incentives, or subsidies available in many European countries.
Ventilation heat recovery efficiency also affects the energy rating of buildings, contributing to increased property value and compliance with green building certifications.
A successful heat recovery ventilation system installation requires technical precision — and Alnor makes it seamless. Our units are delivered with detailed technical documentation and designed for fast deployment in both new and existing structures.
Alnor HRUs allow full HVAC system integration, working flawlessly with underfloor heating, heat pumps, and smart home ecosystems, enabling intelligent climate control.
To sustain performance, scheduled ventilation unit maintenance is essential. This includes filter replacement (every 3–6 months) and heat exchanger cleaning (annually). We provide professional HRU installation support, post-installation training, and long-term service partnerships, helping clients ensure maximum efficiency over the product lifecycle.
Every Alnor solution is a certified heat recovery unit, engineered to meet and exceed leading ventilation system standards. Our systems are tested against EN 13141-7, certified by Eurovent, and aligned with Passive House Institute criteria.
Our in-house laboratory enables rapid prototyping, precision testing, and continuous quality monitoring. This translates to reliable energy efficiency ratings for HRV and full traceability across all production stages.
Clients benefit from transparent performance data, extended warranties, and full support — making Alnor a supplier of quality-assured ventilation solutions you can trust.
Whether you're upgrading an HVAC system or planning a large-scale build, Alnor heat recovery units offer a future-ready solution that reduces costs, boosts indoor comfort, and supports sustainability goals.
Looking for the best heat recovery ventilation system for your building? Our experts are ready to assist with system selection, technical consultation, and project support tailored to your application.
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