To add to the discussion... the location of a piano has a large impact on its ability to maintain its tune. For example, humidity plays a major role with impact

To add to the discussion... the location of a piano has a large impact on its ability to maintain its tune. For example, humidity plays a major role with impacting the soundboard, as well as all of the various wooden components of the piano. In general, a piano should be located in a consistently-maintained environment with regard to humidity and temperature, away from windows and direct sources of cold and heat (e.g., HVAC registers).