The Diplomatic Thermostat

Every shared office has one wall that matters more than all the others. It is the wall with the thermostat on it, and it has ended more friendships than any spreadsheet. One person is wearing a cardigan and fingerless gloves in June. Another is fanning themselves with a folder. Each of them visits the little box on the wall several times a day, adjusts it by two degrees, and walks away with the tight smile of someone who has won a battle but not the war.

The Diplomatic Thermostat ends the war by giving everybody what they want. It is a handsome cream-coloured unit with a large, friendly display and two soft buttons marked warmer and cooler. Press warmer and the number rises. Press cooler and it falls. A gentle whoosh plays from a hidden speaker, and a small green light glows to confirm that your request has been received and is being taken very seriously indeed.

It is connected to nothing whatsoever. The heating is run by a separate system in the basement, set once a year by a building manager nobody has met. The Diplomatic Thermostat simply remembers each person's last choice and shows it back to them when they approach, using a discreet sensor that recognises the way they walk. The cardigan wearer sees twenty-four degrees. The folder fanner sees nineteen. Both return to their desks feeling heard.

The premium model adds a range of reassuring features. There is a slow countdown that says the room will reach your chosen temperature in approximately twelve minutes, which is long enough for everyone to become absorbed in their work and forget. There is a weekly report, emailed on Fridays, thanking staff for their contribution to a comfortable workplace. There is also a locked mode for meetings, which shows the word balanced and plays a short tune reminiscent of a hotel lobby.

Early trials have gone remarkably well. Complaints about the temperature fell sharply in the first month, and two colleagues who had not spoken since a disagreement about an open window were seen sharing biscuits. The only problems arose when two rivals arrived at the thermostat at the same moment, which caused the display to show both numbers alternately, very quickly, until one of them gave up and went to make tea.

The joke is closer to real life than it looks. Heating and air-conditioning technicians have described for years how some office thermostats are dummies, fitted so that people have something to adjust while the real controls sit elsewhere. Workers still report feeling better after turning them. A thermostat on the wall is not only a control for the air. It is a way of telling people their comfort counts.

Part of the reason is that comfort is not purely a matter of temperature. How warm a room feels depends on how active you are, what you are wearing, how damp the air is, and whether there is a draught near your desk, so two people in the same room really can feel different. Psychologists have also found that a sense of control makes many kinds of discomfort easier to bear. So the next time someone quietly nudges the dial, remember that they may be changing nothing but their own mood, and that this counts for something.