Most pianos need tuning at least once per year, more if you are playing it several hours per week or if your home is atmospherically unstable. As a rule pianos go flat in the winter when everything dries out and sharp in the summer when the humidity takes control. Pianos need to be placed away from heat or air conditioning ducts and wood burning fireplaces. Remember this one thing. Excessive heat kills pianos. A lot of people call and ask about “outside” walls. While this may have been a problem when homes weren’t insulated, it isn’t a problem today. Most homes today are so well insulated that drafts are a thing of the past.