On cold days, heating often runs for longer to keep homes comfortable. Energy use depends not only on how long the system is on or how the thermostat is set, but also on how quickly a building loses heat. Reflective panels are one targeted measure that may help in some rooms without altering the heating system.
The panels are fitted behind radiators to limit the heat absorbed by the wall. When a radiator is operating, some heat warms the room while some radiates towards nearby surfaces. If the wall behind it faces outdoors and is poorly insulated, part of that heat may escape. A reflective surface can reduce this transfer and help keep more heat inside.
The panels do not generate heat, increase a radiator’s output or guarantee a particular reduction in energy use. Their usefulness depends on the home and the wall behind the radiator. They are most relevant on poorly insulated exterior walls; on internal walls, much of the heat remains within the home, while well-insulated exterior walls leave less room for improvement.
Before buying a panel, check which radiators are mounted on exterior walls and measure the available space behind each one. Choose a size that fits without covering openings or interfering with airflow. If using a roll, cut the material to fit the area behind the radiator rather than extending it beyond the edges.
Turn off the heating and wait until the radiator is cold before installation. Follow the product instructions for fixing it in place: some panels have adhesive backing, while others require a compatible tape, adhesive or fasteners. Clean the wall if the instructions call for it, and avoid using an improvised fixing method.
Place the panel carefully in the gap behind the radiator. For conventional reflectors, the metalized side faces the radiator, but the product’s instructions should take precedence. Do not cover valves, bleed points or connections, or obstruct air circulation. If the space is too narrow, use a compatible panel rather than moving pipes or removing the radiator yourself.
Sources: elDiario.es.