In a warm office that already reads 26 C, which change can make people feel cooler without lowering the thermostat?
Show answer & explanation
Answer: Add gentle air movement
Add gentle air movement ✓ — Correct. Gentle air movement can make people feel cooler without changing the wall thermostat because it speeds heat loss at the body surface. It removes the warm air layer near skin and clothing and can help sweat evaporate when skin is moist. ASHRAE-style comfort methods treat air speed as a separate lever, which is why a higher room temperature can feel acceptable with a breeze.
Seal every window gap — Sealing gaps can help in a cold drafty winter room, but it is not the best move for a warm 26 C office that needs more cooling at the person. If sealing reduces ventilation or air movement, it may make the room feel stuffier. The useful contrast is that comfort can improve by increasing controlled local air speed, not just by stopping all leaks.
Raise clothing insulation — More clothing insulation usually makes a warm office feel warmer, not cooler. Clothing slows heat leaving the body, which is helpful in cold rooms but the wrong direction when people already need to dump heat. The same comfort model that includes air speed also includes clothing level, and those two levers often push sensation in opposite directions.
More Physics in Daily Life questions
- Why might 26 C feel acceptable in a breezy naturally ventilated summer building but too warm in a sealed winter office?
- On a warm humid day, why can the same 27 C room feel much worse once you start sweating?
- Why can moving air make a 27 C room feel cooler without changing the thermometer?
- Which hidden factor can make a desk beside a cold window feel chilly even when the thermostat across the room still reads 22 C?
- In the same 22 C room, why might someone who just climbed stairs feel warm while someone sitting in a T-shirt feels chilly?
- Why does a quiet seated person still count as a heat source in a 22 C office?