Pianos should never be placed in locations exposed to extreme temperature fluctuations, direct sunlight, or high relative humidity, as wood and felt are highly sensitive to environmental moisture shifts. Specifically, owners must avoid positioning pianos directly against exterior uninsulated walls, right next to active heating or air conditioning vents, underneath drafty windows, near working fireplaces, or in damp unconditioned basements, as these harsh conditions cause soundboards to crack and tuning pins to slip.