The 40" tower fan has a wider oscillating angle of 90 degrees and a 15 hour built-in timer. It also has 4 modes, which are Eco, Night, Natural and Fan. The 30" has a oscillating angle of 70 degrees and a 7.5 hour built-in timer. The tower fan has 3 different modes which are Normal, Natural and Sleep.
What's the difference between the 30" and 40" Tower Fan?
