Install a heat reflector behind the radiators
Why heat the wall that faces the outside? Return heat to the room.
Recommended Materials
- Radiator reflector film (aluminum + insulation)
- Double-sided adhesive
- Scissors
Steps to follow
Step 1
The principle (simple physics): A radiator emits heat in all directions (in front, but also behind). If your radiator is placed against a wall facing the outside (especially if it is poorly insulated), a large part of the heat goes to warm the birds outside. The reflective film acts as a thermal mirror and reflects this heat back into the room.
Step 2
Material: Buy a roll of special radiator reflective film (a layer of thin insulation + a layer of shiny aluminum). It costs around €10-15 per roll.
Step 3
Measure and cut: Measure the height and width of your radiator (the back part). Cut the film with scissors. Tip: Cut it 3 to 5 cm smaller than the radiator (in height and width) so that it is completely invisible once installed.
Step 4
Installation (Easy): No need to dismantle the radiator! Slide the film behind the radiator, with the shiny aluminum side facing the radiator (it does the thinking).
Step 5
Fixing: Use double-sided adhesive to stick it to the wall. If the film is magnetic (some models), it sticks itself to the back of the radiator (if it is steel).
Step 6
The result: The efficiency gain is estimated at 5-10% on an uninsulated wall. The room heats up faster and the wall behind it remains cold.
Frequently Asked Questions
On an interior wall (partition) ?
It is less useful because the waste heat heats the next room (or hallway). Focus on the front walls.
Precautions
- Do not block the radiator ventilation grilles.
- Do not use on electric toaster heaters (risk of overheating).
