<human>:  What is the best air purifier to buy?
<bot>: The best air purifier to buy depends on your specific needs and budget. Some of the most popular models on the market include the Dyson Pure Cool TP04, the Coway AP-1512HH Mighty, and the Honeywell HPA300. Each of these models offer a variety of features and benefits to help you choose the best purifier for your home.