The Dyson Purifier Cool Formaldehyde TP09 is ideal for those primarily concerned with specific indoor air pollutants like formaldehyde, common in new furniture or building materials. If you live in a newly renovated space or have chemical sensitivities, its unique ability to detect and destroy formaldehyde, alongside general particle purification and fan cooling, is invaluable. You prioritize specialized purification over heating capabilities and appreciate direct cooling during warmer months. The $499.89 price point is acceptable for its focused health benefits and advanced sensor technology.

The Dyson Purifier Hot+Cool HP1 is perfect for individuals seeking an all-in-one climate control and air purification solution. If you need a device that can heat a room in winter, cool it in summer, and continuously purify the air by removing particles, gases, and odors, the HP1 is your best choice. Its slightly higher price of $544.99 is justified by its versatile 3-in-1 functionality. You value convenience and space-saving, preferring one appliance for multiple comfort needs, controllable via app or voice commands.