Karma, Not Cash: How a Non-Monetary System Could Make Heating Fairer and Greener

Imagine if your heating bill depended not on how much money you had, but on how thoughtfully you'd used heat in the past. Researchers at KTH, a technical university in Stockholm, Sweden, are testing exactly that kind of system — and early results suggest it could cut heating waste by 14% while being fairer to low-income families.

The idea is called a "karma economy." Instead of paying money or receiving financial penalties for how you heat your home, your past behavior shapes your future heating access. Waste too much heat by leaving windows open in winter, for example, and your karma goes down — meaning you get less heating allocation later. Use heat wisely, and your karma rises, giving you more access when you need it. No cash changes hands.

Buildings account for a surprisingly large slice of global carbon emissions — about 10%, mostly from heating. New technology like heat pumps can help, but researchers say technology alone won't be enough to reach climate goals. People's habits matter too. The problem is that most programs designed to encourage smarter heating habits rely on money, which puts low-income households at a disadvantage. If you can't afford to invest in smart thermostats or don't have time to monitor real-time pricing signals, you're left out.

The karma system sidesteps this problem entirely. "Karma leverages the repeated and dynamic nature of heating energy allocations to attain climate targets both fairly and efficiently over time without resorting to financial means," the research team explains.

The KTH researchers ran their experiment using a digital model of their Live-In Lab, a real building on campus where scientists study how people actually live in test spaces. The simulation helped them fine-tune how karma accumulates and decreases, and estimate what might happen when real people try it. Next, they plan to test it with actual human volunteers living in the lab.

If the results hold up in real life, the karma approach could offer a new path toward greener, fairer heating — one where everyone competes for climate points, not dollars.