Weather compensation

The weather is the main influence on the heat demand of a building. In cold periods the building requires more heating, and vice versa when the breezes in the surrounding area are warmer.

The weather constantly changes, and so does the heat load required to warm up a house. Compensating for the weather influence is therefore a rational and sound way to achieve energy savings. Our electronic controllers with weather compensation help you achieve such energy savings through intelligent heating control.

Weather Compensation in District Heating Systems

The optimum heat supply to a building is when the demand is met and nothing is in excess. An intelligent electronic controller for weather compensation in the heating system can proactively adjust the supply of heat to keep it at exactly that point by detecting changes in the weather conditions outside. In contrast, a heating system without a weather compensator will only react to the current indoor temperature, and thus be prone to delayed reactions when changes occur outside. This negatively affects both user comfort and energy efficiency.

How does it work?

The weather compensator gets its signal from an outdoor temperature sensor placed on the shadow side of the building. The sensor registers the actual temperature and the electronic controller adjusts, if necessary, the heat supply (flow temperature) to reflect the new conditions. The controller will also adjust the heat supply to the radiators and ensure that room temperatures are kept constant. The user will thereby not even notice that the weather has changed outside and experience the same temperature and comfort at all times.

10 - 40% energy savings with electronic weather compensation

A report by COWI, a leading environmental science consulting group, puts the estimated energy savings with electronic weather compensators in one-family houses at 10% and in some cases as much as 40%. According to the report, one-family houses with large heat consumption gain particularly fast returns on investment after installing electronic weather compensators.

Besides this, legislative regulations for multi-family and commercial buildings prescribe weather compensation. In more and more countries, this also applies to one-family houses.

A heating system with electronic weather compensation can have additional control functions, such as:

• Flow and capacity limitation
• Temperature limitation possible for primary return temperature and/or secondary flow temperature
• Safety function can be established
• Periodic system set-back function
• Possibility of data communication to e.g. a SCADA system or via a web portal
• Logging of energy consumption data

Systems with weather compensation are mainly used in radiator and floor heating systems.