Frequently asked questions

Siemens has a very comprehensive product range. This includes systems and services for power generation, transmission and distribution, as well as energy-efficient products and solutions for production, transportation and building technology; also technologies for high-quality and integrated healthcare. Automation technology, software and data analytics play a central role in all these areas. Our Financial Services Division makes capital available for Siemens and our customers.

Siemens is a stock corporation led by a Managing Board, to which the following people belong (as of December 1, 2017):


  • Joe Kaeser, President and Chief Executive Officer. He is responsible for Governance and Markets, Communications as well as Legal and Compliance.
  • Roland Busch, Chief Technology Officer, is responsible for Corporate Technology, Corporate Development and the Divisions Building Technologies and Mobility. He also oversees the regions Middle East and CIS ­– in addition to Sustainability and next47, our independent unit for startups.
  • Lisa Davis, Chair and CEO Siemens Corporation, USA, is in charge of the Divisions Power and Gas and Power Generation Services as well as the Americas.
  • Klaus Helmrich is responsible for the Divisions Digital Factory, Process Industries and Drives as well as for the regions Europe and Africa.
  • Janina Kugel, Chief Human Resources Officer, is responsible for Diversity, Social Innovation and Environmental Protection, Health Management and Safety.
  • Cedrik Neike is responsible for the Energy Management Division. Additionally, he oversees the regions Asia and Australia.
  • Michael Sen is responsible for the Strategic Units Siemens Healthineers and Siemens Gamesa Renewable Energy. He also oversees Global Services.
  • Ralf P. Thomas, Chief Financial Officer, is responsible for Finance and Controlling as well as Financial Services.

We suggest checking filters monthly. If you have a disposable type filter, and if it is dirty, just replace it. Don't attempt to clean it. Some higher efficiency 1" pleated air filters can go up to three months before needing replacement. But in the higher-use seasons, it's better to check more often

A system that is too large will cool or heat your house quickly, but you may not feel comfortable. That's because it will satisfy the thermostat before it can adequately remove sufficient moisture from the air during the cooling mode, leaving you feeling sticky and humid. This could even lead to moisture and mold problems. And, the stress of short-cycling will shorten the life of your equipment and increase your heating and cooling bills.
On the other hand, a system that is too small just cannot get the job done, especially in extreme weather conditions. The air conditioner will run constantly in the Summer and the furnace will do the same in the Winter.
But a correctly sized system isn't just based on the size of the structure. Many factors go into determining the size of the system. Including type of house and walls, type and size of windows, insulation, basement and attic conditions, house orientation, and so on. A Salesman must visit the house and take detailed measurements and notes while conducting the survey.
An air conditioner can change the temperature, humidity, even the general quality of the air in your home. More specifically, an air conditioner makes your home cooler, by absorbing heat energy from the house and transferring that heat outside, then replacing the air inside your home with cooler air.
The air conditioner in a central heating and cooling system provides cool air through ductwork inside your home, by providing a process that draws out the warm air inside, removing its heat. In a split system, the compressor condenses and circulates the refrigerant through the outdoor unit, changing it from a gas to a liquid. The liquid is then forced through the indoor evaporator coil or cooling compartment. The indoor unit’s fan circulates the inside air to pass across the evaporator fins. The evaporator’s metal fins exchange the thermal energy with the air around it. There, the refrigerant turns from liquid into vapor, removing any heat from the surrounding air. As the heat is removed from the air, the air is cooled and blown back into the house.

Our values – responsible, excellent and innovative – are the basis for Siemens’ success. They provide us with orientation and guide our decision-making processes. With our daily actions, we express them and make them come alive.