Energy-optimized automation for heating and cooling

Energy saving functions

Energy saving functions for heating and cooling allow energy-optimized automation of the technical installations of a building, thus reducing energy consumption drastically.

Minimized control deviation – feel comfortable, with good conscience

Individual room controllers with actuators from Siemens offer high-precision control within an extremely narrow tolerance band of +-0.2 Kelvin (certified by eu.bac); with standard room thermostats, on the other hand, the temperature fluctuates between 1 to 2 Kelvin.

The high control accuracy enables the room to have a lower setpoint, increasing energy efficiency.

Individual room temperatures – site-specific energy output

In every room, an individual room temperature can be set that meets the desired comfort needs.

Individual time-based programs and presence detectors ensure that the temperature is increased from pre-comfort to comfort level only when the room is occupied. In addition, they activate the energy saving mode at night as well as on weekends, holidays, and during vacation periods.

Window contact control – preventing energy waste

Once the control recognizes via a connected window contact that a window has been opened, it

  • automatically closes the control valves in the room,

  • stops energy output, and

  • activates the protection mode to prevent damage.


Optimized start/stop control (OSSC) – saving without sacrifice

Thanks to optimized start/stop control, the control switches the heating on at the appropriate time to ensure that the stipulated room setpoint has just been reached when occupants enter the rooms.

OSSC switches the heating off before the occupants leave the room while maintaining the comfort mode.

This saves energy at night, on weekends, and during vacation periods.

Heating and cooling demand control – Optimizing energy production

The energy demand signals (valve positions and temperatures) from the rooms are collected and then summarized and evaluated per heating and cooling circuit.

The demand derived from this information is transmitted to the generation and distribution, where flow rates and supply temperatures are adapted to the current demand.

Demand control of the pump – saving electrical energy

In the case of lower energy demand, the room control valves close and the differential pressure in the piping system increases.

Constant control of the differential pressure reduces the volumetric flow and the output of the pump decreases, thus reducing the energy consumption.

The speed control with variable differential pressure achieves even higher electrical energy savings.

Systematic energy generation – increasing energy efficiency

By evaluating the heating or cooling demand signals, the generator temperature can be adjusted to the current temperature needs.

Heat or cooling losses within the generator that are caused by unnecessarily high or low temperatures are thus minimized.

If multiple heat and cooling generators are available, the priority control releases those aggregates for operation whose output and effectiveness optimally meet the current energy demand.

The sophisticated switching of the operating sequence influences the generators in such a way that they can be operated with a high degree of use – thus ensuring energy-optimized operation.

Predictive heating controller – saving energy and costs

The patented predictive heating controller combines the following elements: outside temperature forecast, adaptation of heating curve and building model parameters, model-related forecast of room temperature, start/stop function, plus optimization of flow temperature setpoint.

Due to complete adaptation of the building model parameters, commissioning and maintenance costs are cut and energy savings are reached. Excellent system management improves both the transition from boost heating to comfort mode and the behavior in case of undersized heating output.

TABS control – highest comfort at low energy consumption

The energy saving function TABS control uses a patented process and controls TABS zones to ensure year-round fully automated operation.

The innovative application is modular in design. The base control strategy can be extended by optional modules to improve comfort and/or energy efficiency depending on given requirements and TABS plants.

Solar panel control – heat storage charged by solar energy

The application ensures optimum charging and discharging of heat storages. Charging takes place primarily through solar energy, then by heat supplied by a heating boiler.

When using solar collectors, discharging and consumer return can be operated at two levels. The integrated charging level indication shows the operating state of the heat storage.