The Guilt of the Glossy Flyer

You are looking at the paper in your hand, a glossy flyer that arrived with the morning post, and you are feeling that familiar, low-grade thrum of guilt. It features a high-resolution photo of a family in knitwear and a bold, sans-serif promise: “Save up to 31% on your energy costs.” There is a list of suggestions below it. Most of them are verbs. Seal. Insulate. Optimize. Reduce. What there isn’t, anywhere on the card, is a single number with a unit attached to it that relates to the actual air you are breathing right now.

I am looking at that same kind of vagueness from my desk, having just typed a login password wrong five times in a row. It is that specific brand of systemic frustration where the interface tells you “Error,” but refuses to tell you if you missed a capital letter, a digit, or if your finger just slipped on the ‘P’. It is a refusal of precision in favor of a general, unhelpful “No.” The energy conversation operates on this exact same frequency. We are saturated with urgency, but starved of the arithmetic required to solve the problem.

The reason for this is rarely discussed, but it’s quite simple: vagueness scales. If a company tells you to “be more efficient,” they can sell that message to a million people living in a million different types of homes. If they give you the literal math of your living room-the volume of air, the thermal conductivity of your specific wall material, and the wattage output of a 630×847 mm panel-they might find out that you don’t actually need to buy anything at all. Or worse, they might find out you only need one very specific thing that they don’t sell.

The Immersion Fallacy

I spent several years as a difficulty balancer for mid-to-high budget video games. My entire job was to tweak the “feel” of an experience so that a player felt challenged but not cheated. For a long time, I was a staunch advocate for hiding the math. I believed that showing a player a health bar with numbers-say, 1,420 out of 2,000-broke the “immersion.” I thought it was better to use a vibrating screen or a red tint to indicate “You are hurt.”

I was wrong. I was profoundly, demonstrably wrong.

I realized this when I watched playtesters interact with a boss fight I’d designed. They weren’t immersed; they were anxious. Because they didn’t know if a healing potion restored 10% or 50% of their health, they didn’t take risks. They played tentatively, hoarding resources, and eventually getting frustrated because they couldn’t plan. The moment I toggled the “Show Numbers” option on, the behavior changed. They became bold. They calculated. They took the hit because they knew they had 200 points to spare.

The Arithmetic of a Room

The energy industry treats you like a playtester in a game where the UI has been turned off. You are told to “turn the heat down,” but you aren’t told how many Watts of heat your current radiator is actually dumping into the room versus how much that room is leaking per hour. Without that math, you aren’t an actor in your own home; you are just a nervous consumer hoping that the “Eco” setting on a new device is more than just a green sticker.

Let’s look at the actual arithmetic of a room. It isn’t as scary as the marketing departments want you to think. Most people in Germany or the UK are living in spaces where the heating is calculated based on a “Delta T” of 50 degrees. That is the difference between the average temperature of the water in your radiator and the temperature you want the room to be. If you have a room that is roughly 15 square meters, you might need about 1,500 Watts of heat to keep it comfortable during a freeze.

Now, look at your radiator. If it’s an old, clogged, single-panel unit, it might only be outputting 800 Watts. You can “optimize” your boiler settings until you’re blue in the face, but you are essentially trying to fill a bathtub with a teaspoon. The math doesn’t work. Conversely, if you know the room requires that 1,500W, you can look for a specific solution, like a 1800×616 mm vertical flat panel radiator, and see its rated output. Suddenly, the “efficiency” conversation stops being about guilt and starts being about hardware.

This is where a company like SONNI differs from the general “vague urgency” crowd. They aren’t selling you a lifestyle of knitwear and lower thermostats; they are selling you the specific dimensions of a radiator-white or anthracite, side or central connection-that fits a specific gap on your wall. When you move into the realm of sonni Heizkörper, you are leaving the world of percentages and entering the world of millimeters and Watts. That transition is where the anxiety dies.

When a utility provider sends you a report saying you used “12% more than similar homes,” they are giving you a data point with no path to resolution. What is a “similar home”? Is the insulation the same? Is the inhabitant a 20-year-old who runs marathons or an 80-year-old with poor circulation? By omitting the variables, they keep you in a state of perpetual, low-level concern. Concern is a great motivator for signing up for new monthly “protection plans,” but it’s a terrible way to manage a building.

If we actually wanted to solve the energy crisis at a household level, we would stop talking about “saving” and start talking about “matching.” We would match the heat loss of a north-facing wall to the specific thermal output of a radiator designed for that volume. We would talk about the multiblock valve sets that allow for precision flow control, ensuring that the water isn’t just rushing through the pipes, but staying in the panel long enough to actually radiate its energy.

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The Bathroom Problem

I’ve seen this play out in my own life, beyond the game design world. I used to live in a flat with a bathroom that was perpetually damp and cold. I did what the flyers told me. I closed the window. I turned up the main thermostat. I bought a “dehumidifier” that hummed like a jet engine and cost me a fortune in electricity. None of it worked because the arithmetic was wrong. The bathroom had a tiny, rusted radiator that couldn’t even manage to dry a single towel, let alone heat the room to a point where moisture would evaporate.

The moment I stopped “trying to save” and started “calculating the need,” the solution was obvious. I didn’t need a dehumidifier; I needed a 1600×500 mm towel warmer with a dedicated heating element that could handle the specific cubic meterage of that room. I replaced the hardware, and the problem vanished. The cost of the new radiator was less than three months of running that useless dehumidifier.

The “vague urgency” model would have had me buying a new, “more efficient” dehumidifier every two years. The arithmetic model had me buy one piece of steel that solved the problem for a decade.

The Choice of Uninformed Needing

We have a strange cultural resistance to technical details in the domestic sphere. We think that “width, depth, and finish” are boring details for contractors, while “sustainability” is a beautiful concept for homeowners. But you cannot live inside a concept. You live inside a box made of bricks and mortar that requires a certain number of Joules to stay warm.

The industry’s refusal to lead with the numbers is a choice. It’s a choice to keep the consumer in a state of “uninformed needing.” If you don’t know that a slim vertical radiator can produce the same heat as a bulky horizontal one while freeing up floor space for a desk, you might think you need an entirely new extension to make your home “functional.”

When you start demanding the numbers-asking for the exact output at Delta T50, checking the connection types, measuring the space between your pipes-you are taking back the agency I saw my playtesters reclaim when I finally showed them their health bars. You stop guessing. You stop typing the password wrong and wondering why the system is yelling at you.

The Most Sustainable Choice

In the end, the most “sustainable” thing you can do is to be right the first time. Buy the radiator that actually fits the wall. Order the valve set that actually controls the flow. Stop participating in the theater of vague efficiency and start measuring your world in millimeters and Watts. It is less “inspirational,” perhaps, but it is significantly warmer. And it’s a lot harder to sell you something you don’t need when you already know exactly what you do.