Heat Recovery Units (HRU / ERV)

Heat Recovery Units (HRU) and Energy Recovery Ventilators (ERV) are advanced fresh air systems designed to recover thermal energy from exhaust air and transfer it to incoming fresh air. These systems significantly reduce HVAC energy consumption while maintaining controlled indoor air conditions.

We install and maintain Plate Type Heat Recovery Units, Rotary Wheel ERV Systems, Ceiling Suspended HRU Units, Roof Mounted ERV Systems, Modular Energy Recovery Units, and Industrial Heat Recovery Ventilation Systems. System selection depends on building design, fresh air load, energy efficiency targets, and climate conditions.

Yes, we offer comprehensive Annual Maintenance Contracts (AMC) for HRU/ERV systems including heat exchanger cleaning, rotary wheel inspection, filter replacement, drain cleaning, motor and bearing inspection, sensor calibration, electrical panel inspection, and airflow performance verification. Customized AMC plans are structured for commercial and industrial buildings.

Common causes include reduced heat recovery efficiency, wheel motor failure (rotary systems), plate heat exchanger clogging, air leakage between streams, excessive pressure drop, control panel malfunction, sensor failure, and frosting issues. We provide rapid corrective maintenance with root cause analysis to restore energy recovery performance.

Our installation includes HRU/ERV unit installation, heat exchanger core installation, plate heat exchanger integration, rotary wheel installation, fresh air and exhaust duct fabrication, multi-stage filtration installation, condensate drain piping, electrical wiring and motor termination, control panel and sensor integration, and vibration isolation mounting.

HRU/ERV systems operate using energy exchange between exhaust and fresh air streams through various mechanisms including Plate Heat Exchangers (Sensible Heat Recovery), Rotary Heat Wheels (Sensible + Latent Recovery), Run-Around Coil Systems, and Heat Pipe Systems. Design considerations include temperature differential, sensible and latent heat recovery efficiency, pressure drops, cross-contamination control, and frost prevention.

Yes, we execute retrofitting services including addition of heat recovery cores, upgrade from plate to rotary systems, efficiency enhancement retrofits, control logic modernization, BMS integration upgrade, and energy performance improvement. Retrofitting significantly reduces operational energy costs.

We provide temperature and humidity sensor integration, BMS integration, demand-controlled ventilation integration, VFD integration, bypass damper automation, and remote monitoring dashboards. Automation ensures optimized energy performance and operational reliability.

HRU/ERV systems can recover 60-80% of energy from exhaust air, significantly reducing HVAC energy consumption. We conduct heat recovery efficiency audits, airflow optimization studies, pressure drop reduction, energy consumption benchmarking, and performance tuning to maximize energy savings.

HRU/ERV systems are widely used in commercial office buildings, IT parks, hospitals, hotels, educational institutions, industrial facilities, residential high-rise buildings, and green building projects. These systems play a critical role in sustainable HVAC design, energy efficiency optimization, and compliance with green building standards.