Does Hanging Towels Reduce a Towel Warmer’s Heat Output?
Short answer: a little but not in the way most people think.
Yes, placing a towel on a towel warmer slightly reduces the heat going directly into the room. But that’s only part of the story. As the towel heats up, it starts releasing warmth too, essentially becoming an extension of the radiator itself. So instead of losing heat, you’re redistributing it.
Here’s what’s happening in simple terms. A towel warmer heats a room in two ways: by warming the air (convection) and by radiating heat from its surface. When you hang a towel over it, airflow is partially blocked, which slightly reduces convection. At the same time, the towel absorbs that heat. Within minutes, it warms up and begins giving off heat of its own.
So now, it’s not just the radiator heating the space it’s the radiator and the towel working together.
In real-world use, this means the overall impact on room temperature is minimal. You’re still heating the space, just with part of that energy going into drying and warming the towel first.
Where things really start to differ is in the quality of the towel warmer itself. Lower-end models tend to have fewer tubes and less surface area. Once you hang a towel on them, you’re essentially covering most of the heat source, which can significantly reduce performance.
Higher-quality towel radiators are designed differently. With more tubing and greater surface area, they continue to release heat even when towels are in place. The towel doesn’t smother the unit it becomes part of the heating process.
A simple way to think about it: on a well-designed towel warmer, the towel adds to the heat. On a basic one, it blocks it.
One last detail worth knowing many European hydronic towel radiators are tested with towels on them, since that’s how they’re actually used. In contrast, some lower-cost electric models are rated without towels, which can make their real-world performance feel underwhelming.
Bottom line: a good towel warmer is built to do both heat your space and your towel at the same time.