The Reventon MC mixing chamber for HC20-45 is sized for integration with HC 20-45 series air heaters, for combined heating and mechanical ventilation management in medium-sized environments (workshops, small warehouses, shops, shopping centers). High-strength galvanized steel construction. Dimensions 900 × 600 × 500 mm. Weight 45 kg. Electrical power 0.3 kW. Maximum airflow 8,000 m³/h, power supply 230V single-phase / 400V three-phase, operating modes heating/ventilation/mixing. Equipped with double anti-freeze protection (mechanical thermostat + digital sensor), MODBUS RTU/TCP communication for integration into BMS systems, intelligent controller with automatic air proportion regulation. Suitable for medium-sized craft and industrial workshops, small warehouses, shops, shopping centers up to approximately 1,000-2,000 m². Distributed in Italy by Krollit.
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Compatible model: HC 20-45
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Frame material: High-strength galvanized steel
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Dimensions: 900 × 600 × 500 mm (customizable)
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Maximum airflow: 8,000 m³/h
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Electrical power: 0.3 kW
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Power supply voltage: 230V single-phase / 400V three-phase
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Communication: MODBUS RTU / TCP
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Anti-freeze protection: Double (mechanical thermostat + digital sensor)
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Weight: approx. 45 kg
Who uses the MC for HC20-45 and for what
The Reventon MC for HC20-45 is a mixing chamber for integration with HC 20-45 series air heaters. Operation: the chamber mixes outside (cold) air with preheated inside air from the heater, distributing a thermally optimized flow that reduces thermal loads on the system and optimizes energy consumption. The intelligent controller automatically regulates air proportions based on the set temperature, minimizing energy use. Multiple operating modes: heating (priority to heated air), ventilation (forced recirculation without heating), mixing (balances internal/external air). The double anti-freeze protection (mechanical thermostat + digital sensor) blocks the external airflow in case of frost risk, protecting the system. MODBUS RTU/TCP communication for remote monitoring and synchronization with other devices (thermostats, BMS systems, industrial automation). Maximum airflow of 8,000 m³/h and electrical power of 0.3 kW sized for medium-sized environments (workshops, small warehouses, shops, shopping centers). Among Krollit's customers, the MC for HC20-45 is chosen by medium-sized craft and industrial workshops, small warehouses, shops, and shopping centers up to approximately 1,000-2,000 m².
Its place in the range
The Reventon mixing chamber range includes 2 models by environment size: MC for HC20-45 (compatible with HC 20-45 heaters, flow rate 8,000 m³/h, power 0.3 kW) for medium environments (workshops, small warehouses, shops, shopping centers); MC for HC50-80 (compatible with HC 50-80, flow rate 15,000 m³/h, power 0.5 kW) for large industrial environments (warehouses, large shopping centers, production areas).
The MC for HC20-45 is sized for medium environments up to approximately 1,000-2,000 m². Difference from MC HC50-80: approximately half the flow rate (8,000 vs 15,000 m³/h), lower power (0.3 vs 0.5 kW), available voltage 230V single-phase or 400V three-phase (vs only 400V three-phase). For larger environments (over 2,000 m² or industrial sheds), the MC for HC50-80 is correctly sized. For very small environments (under 500 m²), evaluate whether a mixing chamber is necessary or if a standalone heater is sufficient.
Krollit Logistics and Support
Shipping 5-9 working days (7 days for Southern Italy). The MC for HC20-45 mixing chamber is shipped on a pallet, weighing 45 kg. Installation and connection to the heater require specialized HVAC technical personnel. Sensors, controllers, MODBUS spare parts and complementary Reventon accessories are available from Krollit with 3-5 working day shipping. Customer support in Italian is available.
Who is the MC for HC20-45 for?
| Profile |
Compatibility |
Reason |
| Hobbyist / small workshop |
Not recommended |
Industrial HVAC system: exclusively professional application with installation by specialized technical personnel. |
| Workshops, warehouses, shops |
Recommended |
Airflow 8,000 m³/h and power 0.3 kW sized for medium environments (workshops, small warehouses, shops, shopping centers). Double anti-freeze protection, MODBUS communication for BMS integration. |
| Integrated system with BMS / automation |
Recommended |
MODBUS RTU/TCP communication for remote control and synchronization with other devices. Multiple operating modes (heating, ventilation, mixing) manageable by centralized supervision. |
Not suitable for: hobbyist environments or small workshops (oversized; a standalone heater is correctly sized); environments without a compatible HC series heater (the mixing chamber integrates with specific Reventon HC heaters); installations without specialized technical personnel (integration requires HVAC and MODBUS expertise); corrosive environments or those with explosive dusts (specific certified ATEX models are required).
Compatibility and application
| Specification |
Value |
| Compatible model |
HC 20-45 |
| Operating modes |
Heating, ventilation, mixing |
| Regulation |
Cascade, single or group control |
Technical specifications
| Specification |
Value |
| Frame material |
High-strength galvanized steel |
| Dimensions (L × D × H) |
900 × 600 × 500 mm (customizable) |
| Weight |
approx. 45 kg |
| Electrical power |
0.3 kW |
| Maximum airflow |
8,000 m³/h |
| Power supply voltage |
230V single-phase / 400V three-phase |
Protections and communication
| Specification |
Value |
| Anti-freeze protection |
Double (mechanical thermostat + digital sensor) |
| Communication |
MODBUS RTU / TCP |
| Integration |
BMS systems, thermostats, industrial automation |
Compliance
| Specification |
Value |
| Marking |
CE |
Standard equipment
- Reventon MC mixing chamber for HC20-45
- Integrated intelligent controller
- Temperature sensors (supply, return, outdoor)
- Mechanical anti-freeze thermostat
- Digital anti-freeze sensor
- MODBUS RTU/TCP module
- Installation and use manual in Italian
- CE conformity documentation
Frequently Asked Questions
Does the chamber work without an HC heater?
No. The mixing chamber is designed specifically for integration with Reventon HC series heaters. Without a heater, the chamber cannot perform the heating function; it can only operate as a mechanical fan for air recirculation.
For standalone mechanical ventilation applications, dedicated fans are available and significantly cheaper. The MC mixing chamber is sized for integration with a complete HVAC system. For projects that only involve ventilation and not heating, the MC chamber is oversized.
What does MODBUS RTU/TCP mean?
MODBUS is a standard industrial communication protocol for automation devices. RTU (Remote Terminal Unit) uses an RS-485 serial cable for local communication; TCP uses an Ethernet network for communication via corporate networks or the internet. Both allow control of the chamber from centralized supervisors.
For integration into BMS (Building Management System) systems in professional buildings, hospitals, and shopping centers, MODBUS is the de facto standard. The MC chamber can be monitored and regulated from a remote workstation: set temperature, operating mode, alarms. For integration with specific systems, it is recommended to consult the building's BMS system integrator.
Is double anti-freeze protection necessary?
Yes, it is a mandatory safety component for HVAC systems operating with outside air. The risk: in case of frost, moisture in the air turns into ice on sensors and heat exchangers, causing mechanical damage and system shutdown.
Single protection (mechanical thermostat only) can fail without warning: if the thermostat does not detect frost, the system continues to operate, causing damage. Double protection (mechanical thermostat + digital sensor) offers redundancy: if one of the two sensors fails, the other continues to protect the system. For environments with regular frost risk (mountain areas, outdoor warehouses), double protection is mandatory; for continuously heated environments, it is prudent to still have redundancy.
Does installation require specialized personnel?
Yes. The integration of the chamber with the existing HC heater, the electrical connection, and MODBUS configuration require expertise in HVAC systems and industrial automation. DIY installation is not recommended for safety and warranty reasons.
Krollit provides telephone and email support for technical clarifications during installation, but the work must be carried out by qualified personnel (certified HVAC technician). For complex projects, it is recommended to involve a professional thermotechnical engineer for preliminary design. The chamber's warranty is valid only if installation has been performed by qualified personnel according to the manufacturer's specifications.
Is the 15-20% efficiency truly measurable?
Yes, but it depends on operating conditions. The 15-20% energy saving is a typical value in environments with an average ratio of fresh air to recirculated air; in environments with high fresh air demand (hospitals, gyms), the saving may be lower; in environments with low demand (offices, closed warehouses), it may be higher.
To measure actual savings, it is recommended to install dedicated energy meters (thermal energy for heating, electricity meter for fans) and compare with the situation before installation. For certified energy efficiency projects (ESCOs, white certificates), baseline + post-intervention measurement is mandatory. For correct sizing of expected savings, consult a professional thermotechnical engineer.
