Modular Energy Recovery Units

The process begins at the fresh-air intake, where outdoor air enters through weather-resistant louvers, protective screens, and motorized dampers, regardless of outdoor temperature and humidity.

Simultaneously, stale return/exhaust air is drawn from conditioned areas. This air contains valuable recoverable energy in the form of specific exhaust-air temperature and humidity.

Both airstreams undergo rigorous air filtration. Fresh-air and exhaust-air filtration ensure clean indoor air quality while protecting the internal recovery components, carefully balancing pressure-drop considerations.

In the recovery core, sensible heat transfer (and latent/moisture transfer where applicable) occurs. The heat exchanger operating principle ensures that energy from the exhaust air preconditions the fresh air, drastically reducing the fresh-air cooling or heating load.

Post-recovery, the fresh air can undergo additional treatment, including active cooling, dehumidification, heating, reheat, or additional high-efficiency filtration to meet exact indoor requirements.

A high-efficiency supply fan pushes the conditioned fresh-air distribution through the duct network, seamlessly integrating with other centralized HVAC equipment.

The exhaust fan forcefully expels the stale air after its energy has been recovered, ensuring proper discharge distances to avoid recirculation into the fresh-air intake.

Intelligent operation is maintained via temperature sensors, humidity sensors, differential-pressure sensors, and airflow monitoring. VFDs and motorized dampers are managed through seamless BMS integration.

Also known as an enthalpy wheel, this rotating heat exchanger offers exceptional sensible heat recovery and latent energy recovery with suitable media. It includes a specialized wheel drive and purge arrangements to minimize cross-contamination.

Utilizing a fixed plate exchanger with completely separate air channels, this technology guarantees zero moving parts. It provides excellent sensible energy recovery and can incorporate membrane-type latent recovery where applicable.

This relies on passive refrigerant-based heat transfer. It provides highly reliable sensible energy recovery while maintaining completely separated air streams for environments where zero cross-contamination is mandatory.

Featuring distinct supply and exhaust coils connected by a circulating fluid and pump requirement, this system offers physically separated air streams. It is ideal when fresh air and exhaust ducts are located far apart.

This encompasses both sensible plus latent energy transfer, ensuring vital humidity recovery. It is highly suitable for humid climates to reduce the latent load on the central air conditioning system.

Built with sectional construction, the frame offers immense structural rigidity, premium thermal insulation, low air leakage, and easy service access.

Equipped with heavy-duty louvers, control dampers, and intake screens for precise airflow control.

Features a dedicated extract connection, dampers, and a customized discharge arrangement for optimal airflow regulation.

The heart of the unit, housing the chosen rotary wheel, plate exchanger, heat pipe, or run-around coil to maximize recovery efficiency.

Includes pleated pre-filters, fine filters, and higher-efficiency filtration where indoor air quality demands it.

Vital for the protection of recovery components, ensuring dust reduction and minimizing routine maintenance.

Engineered for exact airflow and static pressure requirements, featuring high fan efficiency and VFD compatibility.

Handles the exhaust airflow and system pressure, crucial for airflow balancing and variable-speed operation.

Where required, integrates a chilled-water coil or DX coil for sensible cooling and dehumidification.

Accommodates hot-water heating, electric heating, and reheat coils for winter operation or humidity control.

Allows for an energy recovery bypass during mild weather, enabling free cooling and economizer operation.

Ensures proper condensate collection, featuring a sloped drain arrangement and traps to maintain internal hygiene.

Packed with sensors for temperature, RH, pressure, and airflow, alongside VFDs, actuators, and BMS communication modules.

While single-skin is available for basic needs, Compress India recommends double-skin construction for superior insulation, enhanced thermal performance, low acoustic footprint, and suitability in demanding applications.

We offer varying panel thicknesses with high-density polyurethane (PUF) or rockwool insulation to guarantee strict condensation control.

Options include standard GI, pre-coated GI, aluminium, or stainless steel where required for hygienic or corrosive environments.

Prevents heat transfer through the frame, providing a reduction of thermal bridging, high condensation resistance, and peak energy efficiency.

Engineered for precise section joining, airtight sealing, perfect alignment, and rapid site assembly.

Designed with hinged doors, removable panels, and inspection windows where applicable, ensuring ample component removal clearance.

We supply units for indoor plant-room installation as well as weatherproof outdoor versions with specialized rain protection and corrosion-resistant finishes.

For each configuration, Compress India meticulously designs the construction, airflow arrangement, and space requirements to match the chosen recovery technology with its most suitable applications—from rooftop spaces to tight indoor mechanical rooms.

Focuses entirely on temperature energy, providing vital summer pre-cooling and winter pre-heating, resulting in a direct reduction in the HVAC mechanical load.

Focuses on moisture transfer, dramatically reducing the humidity load on the cooling coils. This is highly applicable to enthalpy recovery systems in tropical climates.

The combination of sensible and latent energy transfer (enthalpy transfer) yields the greatest positive effect on downsizing cooling and heating equipment.

Measured by comparing the fresh-air inlet temperature against the supply outlet temperature and exhaust inlet temperature.

Measures the efficiency of moisture transfer by evaluating inlet and outlet humidity conditions, heavily dependent on proper recovery-media selection.

Guarantees high temperature recovery performance based on specific design conditions and airflow influence.

Where applicable, ensures efficient moisture recovery based on the exchanger media and the humidity difference.

Calculates the combined energy recovery to demonstrate the massive system impact and energy savings.

Determined by total airflow, temperature difference, humidity difference, and overall exchanger efficiency.

We balance supply-side pressure drop and exhaust-side pressure drop to minimize the fan-energy impact.

Optimized for variable airflow via wheel-speed control, bypass operation, and adaptation to seasonal conditions.

Ensures similar supply and exhaust airflow, maintaining stable building pressure and optimized recovery.

Delivers a slightly higher fresh-air supply, offering a reduction of uncontrolled outdoor infiltration.

Utilizes higher exhaust airflow, essential for containment applications like laboratories, though with some thermal limitations.

Easily managed via volume control dampers, adjustable fan speed, VFDs, and precise airflow measurement stations.

Carefully engineered so the leakage direction is always from the clean supply side to the exhaust side, mitigating cross-contamination considerations.

Utilizes G4/MERV 8 filters for larger particle removal and crucial recovery-core protection.

F7/F9 (MERV 13-15) filters ensure exceptional indoor air quality and smaller particle removal.

Where applicable, HEPA filters are integrated for healthcare, pharmaceutical, and cleanroom support, engineered to handle higher pressure drops.

Provides recovery media protection, leading to reduced fouling and lower maintenance costs.

Integrated sensors provide dirty-filter detection, automatic replacement indication, and help manage the energy impact of clogged filters.

Integrates with the central plant for powerful fresh-air cooling and active dehumidification.

Provides standalone refrigerant-based cooling with seamless capacity modulation.

Utilizes hot-water heating or electric heating for stringent cold-weather applications.

Essential for humidity-control applications, allowing precise supply-air temperature adjustment.

Where applicable, provides humidity addition for strict winter operation or process requirements.

Customizable fine filtration or HEPA where required for application-specific treatment.

A mechanical system for routing outdoor air around the recovery section during conditions when recovery is unnecessary.

Takes advantage of using favourable outdoor conditions to cool the building, drastically reducing mechanical cooling.

Enables automatic control and temperature-based operation directly linked to BMS control.

Compress India programs logic for optimal summer, winter, and transition seasons operation.

Sectional design allows the unit to be built to exact spatial and functional requirements, ensuring a perfect fit.

Choose between wheels, plates, or coils to match your specific performance benefit and suitable application.

Tailor the unit to recover just heat, or heat and moisture, to lower operational costs.

Combines two systems into one footprint, saving space and installation time.

From basic pleated filters to HEPA, ensuring the cleanest possible air delivery.

Transforms the ERU into a complete treated fresh air unit.

Direct-drive plug fans or EC fans reduce energy waste and lower acoustic output.

Allows for Demand Controlled Ventilation (DCV), ramping down power when full airflow isn't needed.

Automates the use of mild outdoor air to save on chiller or compressor energy.

Thermal-break profiles and double-skin panels prevent energy loss and condensation.

Plug-and-play capability for modern smart buildings.

Large access doors make routine maintenance and component replacement easy and safe.

Investing in a modular ERV from Compress India guarantees an immediate reduction in your fresh-air cooling load and heating load. By lowering the latent load with suitable recovery media, your facility will experience significantly lower HVAC energy consumption. The flexible application-specific configuration means easier transportation and site assembly, making better use of available plant-room space. Ultimately, you achieve improved indoor air quality, improved fresh-air ventilation efficiency, and an adaptable system ready for future HVAC requirements.

Compress India’s systems are the backbone of high fresh-air load applications and balanced ventilation systems. Whether you are designing central fresh-air systems for large commercial buildings, implementing industrial ventilation systems, or upgrading via retrofit HVAC projects, our modular configurations match your exact airflow, energy-recovery opportunity, and filtration needs.

From providing quiet, efficient air to IT parks and corporate facilities, to meeting the stringent hygiene standards of hospitals and pharmaceutical facilities, Compress India serves a diverse industrial landscape. Our robust systems easily handle the high ventilation requirements and exhaust-air availability found in airports, shopping malls, and large-scale manufacturing facilities, turning exhaust waste into an energy recovery opportunity.

Calculate the CFM or CMH based on total occupancy and building ventilation requirements.

Assess the available exhaust airflow to maintain proper building air balance and pressurization requirements.

Record the summer dry bulb, wet bulb, relative humidity, and extreme winter temperature.

Note the internal temperature, humidity, contaminant level, and suitability for recovery.

Decide between sensible recovery, latent recovery, or total recovery to meet your target effectiveness.

Choose the optimal rotary wheel, plate exchanger, heat pipe, or run-around coil.

Use airflow, temperature difference, humidity difference, and exchanger performance to find total capacity.

Sum the resistance of the recovery section, filters, coils, ducts, dampers, and terminal devices.

Match airflow and static pressure with high-efficiency fan and VFD requirements.

Base choices on outdoor-air quality, application type, IAQ requirement, and allowable pressure drop.

Add necessary cooling, heating, dehumidification, reheat, or humidification modules.

Check equipment dimensions against individual module dimensions, access routes, and service clearance.

Specify integration for temperature, humidity, airflow, pressure, fans, bypass, and system alarms.

Maximizing sensible efficiency, latent efficiency, and total energy savings through proper core selection.

Ensuring supply airflow and exhaust airflow are matched for peak recovery performance.

Selecting an oversized recovery core, premium filters, and coils to minimize fan energy.

Proper fan selection utilizing high motor efficiency or EC plug fan options where applicable.

Implementing variable airflow for demand-based ventilation, significantly reducing fan power.

Engaging free cooling and avoiding unnecessary energy recovery during mild seasons.

Utilizing variable wheel speed where applicable and bypass modulation for optimal part-load operation.

Maintaining low pressure drop to ensure heat-transfer efficiency and low fan energy.

Automating fan scheduling, temperature, humidity, airflow, bypass control, and energy monitoring.

Caused by dirty recovery media, airflow imbalance, a damaged exchanger, or incorrect controls.

Often due to dirty filters, high duct resistance, fan problems, or closed dampers.

Results from incorrect fan settings, pressure differences, filter loading, or duct resistance.

Traced to dirty filters, a dirty exchanger, excessive face velocity, or improper sizing.

Linked to high fan speed, excessive pressure drop, poor airflow balance, or an ineffective control strategy.

Stemming from incorrect recovery technology, damaged recovery media, bypass damper issues, or an operating-condition mismatch.

Caused by blocked drains, incorrect traps, or poor equipment levelling.

Resulting from fan imbalance, motor problems, poor isolation, or high air velocity.

Ensured through strict heat exchanger design, minimal casing leakage, and high-quality seals.

Must be evaluated for odours, chemical contamination, biological contamination, and process exhaust safety.

Where rotary wheels are used, we mitigate rotational carryover using premium seals, a purge sector, and strict pressure relationships.

Prevented by maintaining absolute seal integrity, zero casing leakage, and the correct pressure differential.

Laboratories, isolation rooms, hazardous process exhaust, chemical exhaust, and highly contaminated exhaust streams require run-around coils or specialized plates to guarantee safety.

Engineered based on exact supply airflow, exhaust airflow, design temperatures, humidity, and required effectiveness.

We match the perfect rotary wheel, plate exchanger, heat pipe, or run-around coil to your application requirements.

Carefully sizing airflow, static pressure, exchanger resistance, filters, coils, and VFDs.

Utilizing only premium materials for the casing, insulation, recovery media, fans, motors, filters, dampers, coils, and controls.

Compress India's modular ERUs are engineered and integrated according to exact project requirements, custom-built through our expert manufacturing partners and supplied from selected top-tier OEMs.

Rigorous factory checks on the casing, heat recovery section, fans, filters, dampers, coils, drain system, electrical components, and controls.

Thorough testing of supply airflow, exhaust airflow, temperature/humidity recovery, static pressure, energy recovery, electrical load, and controls.

All units conform to the standards and requirements genuinely applicable to the supplied equipment and local building codes.