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Dynamic Airflow Balancing

An application for both constant or variable volume air handlers that adjusts terminal units or dampers in concert to dynamically redirect air to spaces that need conditioning the most. Uses weighted averages of zone loads and equipment performance to maximize comfort while optimizing setpoint, setback, and preconditioning to consistently deliver efficiency improvements of 35-45%.

See the Guide to DAB

Dynamic Airflow Balancing scales easily from simple RTUs to advanced hybrid AHUs, and works out of the box to stage fan speed to airflow requirements in the system based on thermodynamic calculations to continuously redirect air. In a variable air volume system with staged heating or cooling, VFD frequencies are automatically set to best match the required stage. For built-up AHUs with chilled water and/or hot water coils and variable frequency drives, DAB resets temperature at the air handler to an optimum value for load calculations. This means proven perfomance in buildings of every size.

75F’s wireless sensors, placed in each zone, capture thousands of data points a minute and millions of data points daily. Data flows across a secure 900 MHz wireless mesh network, to the 75F cloud, where third party weather forecasting and historical data merges in a dynamic thermal model of each building to predict optimal control strategies. After just a few days, the 75F cloud can accurately anticipate heat loads and can use that information to predictively and proactively control the temperature and air volume in zones or offices. After a just a few weeks the weighted average and zone priorities of each building begin to allow zones to arrive at their setpoints at the same time, increasing building comfort, time the system spends in ventilation modes, the life of HVAC equipment, and energy savings even further.

The DAB design is fine grained, so every space gets its own individual temperature control. With these tools, building engineers who implement 75F’s DAB technology can expect vastly improved energy efficiency, occupant comfort, and productivity. These advantages are accessible to a wide variety of commercial buildings thanks to a full-stack solution that works out of the box, scalability across a range of central plant equipment and site footprints, and intuitive and user-friendly tuners like zone prioritization for hassle-free operation.

The two most imprtant loads, or differences between current and desired temperature, in a building are the system load and the zone load.

What makes 75F unique is that as an IoT-based system, customers have the benefits of the 75F cloud for much larger and more accurate data analysis and predictive calculations more complex than any on-premise system can handle.

What makes 75F Dynamic Airflow Balancing unique is that sensor data is used to constantly recalculate weighted averages across zones to create an accurate system load, and then air quality, occupancy, and setpoint data is used to constantly predict and reprioritize zone loads in each space.

This means that decisions flow from the 75F cloud back and down to the CCU to engage the RTU or AHU at the optimal time, with adjustments made to dampers in zones throughout the building simultaneously to maximize the performance of the system. This application effectively keeps the HVAC system optimized, or in balance, while simultaneously ensuring air is always being directed where it is needed most.

In addition to dynamic improvements via constant rebalancing of loads and airflow, the 75F system delivers energy savings via advanced temperature setpoint strategies. This includes site and portfolio-wide scheduling features, setback management, Dual setpoints to eliminate costly simultaneous heating and cooling conditions, and the industry's most advanced and efficient preconditioning calculations for optimal start.

While many programmable thermostats offer these features, 75F is a building management system capable of applying thousands or hundreds of thousands of schedules across thermostats and zones at once, for simple and easy operation.

Explore what 75F can do for you.

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