As global regulations push for decarbonization and energy efficiency, the pressure is growing for building owners, designers, and facility managers to modernize their HVAC systems. Whether through the construction of new high-performance buildings or through the renovation of aging infrastructures, thermal energy must be precisely measured, intelligently regulated, and made as efficient as possible. In this context, ISOIL Industria presents the new MV311 Smart Control, a next-generation thermal energy calculator and controller that stands out as both a metering instrument and a real-time energy optimization tool.
Smart Control
More than a standard calculator, the MV311 Smart Control is a multi-functional, MID-certified platform that merges precise thermal energy measurement with dynamic system control. With built-in PI logic, universal flow sensor compatibility, advanced communication capabilities, and flexible retrofit adaptability, the MV311 is designed to address both technical and regulatory demands in modern HVAC and thermal energy systems. Its performance, versatility, and intelligence make it a strategic asset across commercial, industrial, and institutional environments—from district heating plants and hospitals to shopping centers, data centers, and high-end residential buildings.
Certified Accuracy for Water and Glycol Mixtures
At the heart of any credible thermal energy management solution lies accurate, certified measurement. The MV311 Smart Control is fully compliant with MID MI004 (Directive 2014/32/EU Annex VI) and EN1434, ensuring traceability, reliability, and conformity in energy billing and consumption monitoring.
Unlike many competing instruments, the MV311 is also officially MID-certified for operation with water-glycol mixtures up to 40%, a crucial advantage in climates or applications where antifreeze is necessary.
Quick Start commissioning with MID compliance
One standout feature of the MV311 is its Quick Start configuration function, which streamlines setup and calibration during the commissioning phase. This interactive guided menu allows users to set many parameters quickly and easily, prior to applying the electronic MID seals. Once the parameters are confirmed, the calculator can be sealed in accordance with MID requirements, guaranteeing regulatory compliance without the need for external configuration tools or complex software procedures.
This reduces commissioning time significantly and ensures that even large-scale or time-sensitive projects can maintain accuracy and regulatory alignment from the start. Moreover, the MV311 Smart Control is extremely easy to keep in stock thanks to its universal compatibility and wide configurability.
If design parameters or site conditions change during the execution phase—such as the thermal vector, flow sensor type, other — there is no need to replace the electronics. The same unit can be quickly reconfigured, saving time, avoiding unnecessary purchases, and simplifying warehouse logistics.
Built-In PI Controller: full-scale regulation logic
What sets the MV311 apart from traditional calculators is its integrated Proportional-Integral (PI) control logic. With this capability, the MV311 does not simply monitor energy—it actively regulates it.
The device can be configured to control any actuator or device that supports a proportional analog input, including control valves and variable-speed pumps, via 4–20 mA or 2–10 V outputs (with converter).
The MV311 Smart Control allows the user or the BMS to freely choose and change the regulation variable at any time, directly via the local interface or through the communication protocol. It supports regulation based on one of five key variables:
- Flow rate
- Thermal power
- AT (temperature difference)
- Supply temperature (T1)
- Return temperature (T2)
This flexibility enables dynamic system optimization based on real-time conditions, operating scenarios, or energy strategies, without the need to reprogram or replace the device.
Whether in peak load periods, off-season transitions, or during energy audits, the MV311 adapts instantly to changing control priorities.
Compatible with all flow meter technologies
One of the core strengths of the MV311 is its universal compatibility with any flow sensor technology. Whether the application requires electromagnetic meters, ultrasonic sensors, vortex flowmeters, mechanical turbines and others, the MV311 can seamlessly acquire and process the flow data without restriction.
When used in combination with ISOMtAG electromagnetic flowmeters, the MV311 supports installations with nominal diameters up to DN3000, making it suitable for very high-capacity central energy plants. The flexibility in flow sensor compatibility not only broadens the scope of application, but also allows for simple integration into existing systems—without replacing costly hydraulic infrastructure.
Ideal for new Installations and high-performance retrofits
The MV311 was designed with both new builds and retrofit installations in mind. In new systems, it acts as a core element of high-efficiency design, allowing engineers to meet or exceed the energy performance requirements of directives such as the EPBD (Energy Performance of Buildings Directive). In retrofit applications, however, it becomes an especially powerful tool.
Thanks to its universal compatibility, flexible communication protocols, and standalone control capabilities, it can be added to existing systems without service interruption. Moreover, it can independently optimize energy performance, prevent system inefficiencies such as high return temperatures, and avoid the Low Delta T Syndrome, a common cause of chiller underperformance and energy waste.
By dynamically managing AT, controlling flow, and adapting to real-time operating conditions, the MV311 significantly improves both energy efficiency and the useful life of HVAC systems, even in older infrastructures.
Robust communication and web integration
In the era of connected buildings and IoT-driven automation, the MV311 offers industry-leading connectivity features:
- Up to three simultaneous protocols
- BACnet and Modbus, both via RS485 and Ethernet/IP
- Built-in Webserver with optional TLS 1.2 encryption
- FTP server and SNTP support
- PoE (Power over Ethernet) capability
This connectivity package allows the MV311 to serve as a fully integrated node within any BMS (Building Management System), enabling real-time data sharing, remote configuration, event logging, and alarm monitoring.
For integrators and automation professionals, this drastically simplifies implementation and ensures seamless communication across complex multi-protocol environments.
Thanks to its web interface, users can also configure, visualize, and monitor the device via a standard browser—without the need for proprietary software or middleware.
Advanced data logging and diagnostics
The MV311 Smart Control features an optional 4 GB internal memory, capable of sampling measured values, alarms, and events at intervals as low as 1 second. This turns the MV311 into a powerful diagnostic tool, supporting:
- Historical energy data analysis
- Maintenance scheduling and early fault detection
- System optimization and energy audit support
- Long-term monitoring (over 50 years at 15-minute intervals)
Combined with the free MCP software suite from ISOIL Industria, users can export, visualize, and analyze performance data in multiple formats, adding value to energy reporting and compliance documentation.
Preventing inefficiencies, maximizing ROI
Energy inefficiency is one of the largest hidden costs in HVAC and thermal systems. Common culprits include oversized equipment, uncontrolled flow, poor AT management, and failure to adapt to changing thermal loads. The MV311 addresses these issues directly.
By preventing overflows, regulating temperature deltas, and maintaining optimal return temperatures, it protects chillers, boilers, and exchangers from premature wear while reducing pumping energy and generation losses. This not only cuts operating costs but extends equipment lifespan.
The result is an increased overall system ROI, improved environmental performance, and compliance with green building certifications such as LEED, BREEAM, and local ESG frameworks.
Real estate value enhancement and long-lerm benefits
More than just a smart calculator, the MV311 is a long-term investment in asset performance. In both new and existing buildings, it contributes to higher energy class ratings, which directly influence property valuation.
Investors and facility owners increasingly look for verifiable energy efficiency indicators when assessing the long-term viability of real estate.
By enabling smart control, reducing energy costs, simplifying management, and ensuring compliance with EU regulations like EPBD (EU Directive 2018/844) or BACS EN 15232-1, the MV311 becomes an indispensable tool for property portfolios aiming to remain competitive and future-ready.
For further information, please do not hesitate to contact our specialists.