Rooftop Systems

- Mitsubishi Electric

Climaveneta rooftop units (part of Mitsubishi Electric Hydronics & IT Cooling Systems) are autonomous, packaged air-cooled units dedicated to air handling and air renewal in large volume areas such as supermarkets, shopping centers, cinemas and exhibition centers. The range spans the established WSM2 series through to the newer, more compact and lower-GWP WSM3 series.

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WSM2

WSM2 is an autonomous rooftop unit dedicated to air handling and air renewal in large volume areas. All models come with a double cooling circuit, scroll compressors, R410A refrigerant, and EC plug fans. Available in seven operational types and three heat recovery technologies, with cooling capacity from 81.1 to 182 kW and airflow from 13,500 to 30,500 m³/h.

Data sheet

WSM2/AR, Air Recirculation

The basic unit in the WSM2 range, providing total recirculation where air renewal and exhaust extraction are managed separately. Ideal for replacing older units in pre-existing HVAC plants.

Capacity: 81.1 to 182 kW cooling capacity

Double independent cooling circuit, scroll compressors and R410A refrigerant
EC plug fans with built-in motor and electronic expansion valve as standard
Extended outdoor range, -12°C in heat pump to +48°C in cooling
Sandwich panel structure with rubber gaskets for thermal insulationW

WSM2/HR-B, Heat Recovery with Refrigerant Booster

Mixes recirculated ambient air with fresh outside air, with the controller automatically managing free cooling based on indoor and outdoor temperatures. Ideal for refurbished buildings with existing air extraction.

Automatic free cooling operation via the AIR3000TE controller
Reduces compressor use by exploiting favourable outdoor conditions
Suited to low air-tightness or refurbished buildings

WSM2/AX, Air Mixing with Axial Fan Extraction

Mixes recirculated ambient air with fresh outside air, using one or more axial fans to ensure exhaust air rejection. Ideal for commercial applications such as service stations needing a compact, autonomous solution.

One or more axial fans dedicated to exhaust air rejection
Compact, autonomous solution for commercial applications
Free cooling mode available up to 100%

WSM2/CE, Air Mixing with Plug Fan Extraction

Fitted with three motorised dampers for fully recirculated, mixed or extraction and expulsion modes. An EC plug fan on the return airflow allows accurate control of pressure in air-conditioned rooms.

EC plug fan on return air for accurate room pressure control
Three motorised dampers for flexible operating modes
Free cooling mode available up to 100%

WSM2/HR-B, Heat Recovery with Refrigerant Booster

Fitted with the exclusive Refrigerant Booster heat recovery system, promptly and fully recovering heat from exhaust air and transferring it to the refrigerant circuit to increase capacity while reducing compressor power draw.

Compact footprint, ideal for Mediterranean climates
Cooling capacity up by up to 12%, thermal capacity up to 11%
Reduces compressor power by exploiting exhaust air energy

WSM2/HR-P, Heat Recovery with Plate Heat Exchanger

Uses cross-flow heat recovery to transfer thermal energy from exhaust air to the fresh airflow, extending the operating limits. Available in Low Flow and High Flow versions depending on fresh air requirement.

Complete airflow separation for quick, easy cleaning and maintenance
Cooling capacity up by up to 10%, thermal capacity up to 22%
By-pass dampers reduce pressure drop during free cooling

WSM2/HR-E, Heat Recovery with Rotary Enthalpy Wheel

The most efficient WSM2 heat recovery technology, using a hygroscopically coated enthalpic wheel to recover both latent and sensible heat between fresh and exhaust air, reaching efficiencies of up to 85%.

Latent heat recovery with efficiency up to 85%
Cooling capacity up by up to 45%, thermal capacity up to 39%
Quick return on investment through efficiency gains

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WSM3

The newer generation of packaged, reverse-cycle or cooling-only rooftop units, working with low GWP R32 refrigerant and offering up to 30% reduced footprint and weight compared to WSM2, across eight sizes from 80 to 180 kW (16,000 to 33,000 m³/h).

Data sheet

WSM3-G07/AR, All Recirculation

The basic unit in the WSM3 range, designed for air recirculation only, taking air from the served rooms and delivering it back after conditioning through the filters and direct expansion coil. Ideal for replacing obsolete units in existing installations.

Capacity: 75.0 to 176 kW cooling capacity

Low GWP R32 refrigerant with reduced environmental impact
1+i compressor technology, fixed plus inverter, on sizes up to 120 kW
Reduced footprint and weight, up to 30% lower than WSM2
Electronic expansion valves and EC plug supply fans as standard

WSM3-G07/MF, Mixing and Free Cooling

Features two opposing motor-driven dampers for recirculated air only, mixtures and free cooling, mixing recirculated air with fresh outside air at a fixed or CO2-controlled percentage.

Capacity: 80.0 to 188 kW cooling capacity

Motor-driven dampers for recirculation, mixing and free cooling
Free cooling managed automatically by the AIR3000+ controller
Optional CO2 probe for demand-based fresh air control

WSM3-G07/AX-F, Extraction with Heat Recovery Free

Mixes recirculated and fresh air with axial extraction fans, conveying exhaust air through the exhaust damper to the outdoor coil to recover residual thermal energy. Ideal for small to medium commercial spaces.

Capacity: 80.5 to 190 kW cooling capacity

Axial extraction fans with brushless EC motor for efficiency
Residual heat recovery via the outdoor coil
Ideal for supermarkets, shops and service stations

WSM3-G07/HR-F, Heat Recovery Free

Uses a three-damper mixing chamber and return air EC plug fans, conveying exhaust air through the exhaust damper to the outdoor coils to increase overall performance in new, high air-change buildings.

Capacity: 80.5 to 190 kW cooling capacity

Return air EC plug fans overcome pressure drops above 250 Pa
Precise control of overpressure in air-conditioned spaces
Suited to cinemas, theatres, auditoriums and shopping centres

WSM3-G07/HR-B, Refrigerant Booster Heat Recovery

Uses a booster recovery coil near the exhaust damper to fully recover heat from exhaust air, transferring it to the refrigerant circuit to increase air handling coil capacity without increasing compressor workload.

Capacity: 87.4 to 206 kW cooling capacity

Complete, precise recovery of exhaust air energy without mixing
Increased cooling and heating capacity with reduced compressor power
Ideal for Mediterranean climates with mild winters

WSM3-G07/HR-P, Heat Recovery Plate

Uses a plate heat exchanger for energy recovery between fresh air intake and exhaust air, available in Low Flow and High Flow versions depending on fresh air requirement, extending the operating limits.

Capacity: 86.1 to 201 kW cooling capacity

Complete separation between exhaust and fresh air, no contamination risk
Easy cleaning and minimum maintenance, low pressure drop
By-pass damper reduces fan power in free cooling

WSM3-G07/HR-E, Heat Recovery Enthalpic

Uses a rotary enthalpy wheel to recover both sensible and latent heat between fresh outside air and exhaust air, with efficiency between 60% and 90% depending on operating conditions.

Capacity: 103 to 229 kW cooling capacity