Put reflective foil behind radiators on outer walls
About 3 m² of radiator foil on uninsulated outer walls saves around 2% of heating costs.
Do it yourself
Sources checked on .
Medium impact≈ 60 kg CO₂ a year · 6×HeatingLevel 2 · Quick fixCost: Under €100A few hours≈ 2% of heating
Radiator foil reflects heat back into the room instead of into a cold outer wall. It costs little, is fitted without tools, and can be removed when you move out, so it suits tenants well.
Only worthwhile on outer walls that are not insulated; on interior or insulated walls the gain is negligible.
Details
| Impact | Medium · Radiator foil on uninsulated outer walls saves about 2% of heating, which is about 300 kWh a year in an average Flemish house (15,000 kWh for heating). How we rate impact |
|---|---|
| CO₂ saved | About 60 kg of CO₂ a year, roughly the yearly uptake of 6 forest trees. How we count CO₂ |
| Estimated saving | ≈ 2% of heating · Average for radiators on uninsulated outer walls (Flemish government figure). (confidence: medium) |
| Who acts | You (tenant) |
| Needs landlord's agreement | No |
| Type | Action |
| Constant or subject to change | Constant · Good practice that barely changes with new laws, prices or services. |
Sources
- Besparen op uw energieverbruik (in Dutch) · Vlaamse overheid (vlaanderen.be) (official source) · checked on