The same concept applies to the humidity in the air, efforts should be made to keep the humidity within a 20% range, we suggest using humidifiers and dehumidifiers accordingly. Otherwise, when the humidity varies too much your canvas can develop waves. In some instances it may become necessary to bring your art in to a frame shop having it re-stretched, however if they sustain too many variances in humidity your canvas can become permanently damaged.
Fresh air circulation is helpful as well, it is best to use your ceiling fan and hang your art on the wall in a way that allows for some air flow behind the artwork. These measures will help to ensure your art stays in great condition, upholding its value for years to come.