Knowledge base

The background reading behind our rankings — how cooling actually works on the human body, and how to stay safe when it does not.

• How Personal Cooling Devices Actually Work (Fan vs Chilled Air)

  Fans, misters, neck coolers and thermoelectric devices all promise relief. Here is the physiology of what each one does to your body, and when each stops working.

  7 min read

• Heat Exhaustion Warning Signs You Should Never Work Through

  A nurse's field guide to spotting heat exhaustion early, the difference between exhaustion and heat stroke, and what to do in the first ten minutes.

  8 min read

• Managing Hot Flashes at Work Without Making It Everyone's Business

  Discreet, practical strategies for handling hot flashes during the working day, from clothing choices to targeted cooling and thermostat politics.

  7 min read

• Portable Fan Battery Life: How to Read the Claims Honestly

  Why a advertised 12-hour runtime becomes three hours in real use, how mAh, speed settings and heat interact, and what to look for on a spec sheet.

  6 min read