Sunday. Auto show.
Kids are chasing after shiny sports cars.
I’m standing next to the spec sheets—comparing fuel consumption.
3.9 liters… 5.2… 7.8…
And then: the electric models.
No liters. Just: kWh/100 km.
And that’s when it hits me—
It’s exactly the same with windows.
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MYTH: All PVC windows are the same.
That’s like saying: “All cars drive.”
Sure, they do.
But the real question is—how much do they consume?
And how much do they save you over time?
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I remember visiting a factory once.
They proudly showed me their “best” PVC window—
white, glossy, looked just like any other.
So I asked:
“What’s its Uw-value?”
Awkward glances.
Someone muttered: “Well… standard. It’s good.”
That’s like asking a car dealer about fuel efficiency,
and getting: “It doesn’t use much.”
But is that 3.5 liters—or 8.5?
Or worse—what’s the range of that electric car?
They can’t tell you.
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The Uw-value of a window tells you exactly what fuel efficiency tells you in a car:
👉 How much energy leaks out.
👉 How much you’ll pay—year after year.
👉 Whether you’re heating your home or the street.
Uw = 0.73 W/m²K is not the same as Uw = 1.3 W/m²K.
Just like 4 l/100 km is not the same as 8 l/100 km.
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At first, the difference seems small.
But over the years?
💸 One window saves.
🔥 The other silently drains your budget—every winter.
They might look the same.
But they perform completely differently.
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Just like electric cars are transforming how we move,
energy-efficient windows are transforming how we live.
So let us ask:
When you choose windows,
are you picking based on price?
Color?
Or on how much energy they protect?
Because just like with cars—
It’s not just about getting from A to B.
It’s about how smartly you get there.