Many outdoor heating (and semi-open) projects fail for a simple reason: they focus on air temperature. Real thermal comfort is not a number on a thermometer but a physical sensation linked to radiation, surfaces and the human body.
1) The most common confusion: temperature ≠ comfort
Air temperature is a static value. Thermal comfort is a dynamic perception.
In an open or ventilated area, warm air moves, escapes and cools. Even when a thermometer shows a “correct” value, the body still loses heat.
What the human body actually feels
- Convective heat loss (circulating cold air)
- Radiative loss toward cold surfaces
- No “warm” surfaces around you
As long as these losses are not compensated, air temperature alone will never create comfort.
2) Thermal comfort is an energy balance
The human body constantly seeks balance between:
- the heat it naturally produces,
- the heat it loses to its surroundings.
If losses exceed gains, we feel cold even if the ambient temperature looks acceptable.
3) Why electric infrared heating changes the logic
Electric infrared heating does not try to heat the air. It emits radiant energy that becomes heat directly on people and surfaces.
What radiation does
- Heats the body directly
- Warms nearby surfaces (tables, floors, walls)
- Creates a stable comfort zone
What it does not do
- Does not depend on air volume
- Does not escape with the wind
- Does not aim to raise the air temperature
Result: comfort appears faster and stays stable even when the air remains cool.
4) Why two spaces at the same temperature can feel opposite
Consider two situations with the same air temperature:
| Situation | Temperature | Feeling |
|---|---|---|
| Warm air without radiation | 20 °C | Persistent chill, discomfort, drafts |
| Well-positioned infrared radiation | 14–15 °C | Stable comfort, local warmth |
This explains why many “powerful” systems disappoint, while properly designed infrared heating performs better.
5) Typical temperature-driven mistakes
- Oversizing to “raise degrees” → visual and energy discomfort
- Multiplying hot-air heaters → constant losses
- Ignoring cold surfaces (floors, walls, tables)
- Thinking in m² or m³ instead of occupied zones
6) What users actually want
People do not ask for “20 °C”. They want:
- not to feel cold when seated,
- no icy drafts,
- to stay longer without discomfort,
- immediate, local warmth.
Electric infrared heating meets these expectations because it directly affects the body’s heat balance.
Air temperature is misleading whenever a space is not fully enclosed. Real comfort depends on radiant heat, distribution and the ability to compensate the body’s heat losses. That is why electric infrared heating is the coherent solution for true perceived comfort outdoors.