Like comment in here bladeless fan is noisier. It still has fan in for of turbine inside. It is small in size, thus generation high pitch sound which can be annoying to certain people. Once the filter get clogged up. the air produce will drop too since less air can be sucked from outside.

I'm very familiar with Dyson fan. Just because of its design, it is selling at premium price but the actual cost is way lower except for certain product that use special coating process to protect circuit board from moisture.