Radiator Reflectors: Don't Heat the Wall
Impact
Medium
Difficulty
Easy
Speed
Instant
If you have radiators on exterior walls, a huge portion of that heat is being absorbed directly into the cold wall rather than warming your room. You're basically paying to heat the view outside.
The solution is a 'Radiator Reflector'. You can buy specific kits, or just use heavy-duty aluminum foil taped to a piece of cardboard. Place this reflector behind the radiator, with the shiny side facing the room. This bounces the infrared heat back into the living space, improving efficiency and helping the room warm up much faster.
While it might not be the most glamorous 'decor' choice, it's virtually invisible if done correctly. It's a smart hack for older homes that can reduce heat loss through walls by up to 10%. It's a great example of how simple physics can be harnessed to keep you cozy for less. Give your radiators a mirror and let them reflect on their own efficiency!
Quick Check Before You Try This
Use this tip as a practical starting point, then check whether it fits your home. The right answer can change with climate, utility rates, equipment age, household routines, and whether you rent or own.
| Check | Why it matters |
|---|---|
| Your actual bill | A high-impact tip in one home may be minor in another. |
| Equipment age | Older appliances and HVAC systems often waste more energy. |
| Comfort tradeoff | A good energy habit should not make the home harder to live in. |
| Safety or warranty limits | Electrical, HVAC, plumbing, and appliance work should stay inside manufacturer and code rules. |
For a broader next step, browse the EnergyBS guide library and compare this hvac tip with a full article before making a paid upgrade.