If your main goal will be drying carpet or other flooring, you're not going to want a blower fan that blows air at waist height. Conversely, if you want to circulate air in a large, enclosed area, a fan made specifically for drying carpet shouldn't be your top choice. Your best bet is to look at fans that are versatile in flow height and speed. Those models will give you more bang for your buck, since they'll work for various applications. Some models are specifically made for certain jobs, so make sure you know for sure what your chosen fan is designed for before making a purchase.