![]() ![]() That’s useful if you are expecting an overnight freeze, but don’t want to leave the heater running all night. The anti-frost mode is enabled by turning the heater on and setting the thermostat to 41☏ (5☌), which means it will activate when it is just above freezing temperature. It was much quieter than the similar Amazon basics oil radiant heater, which made a noise like rain on a windowpane while heating up. Unlike the fan heaters, the Radia was almost silent in use, with only a few slight popping noises as the oil heated up. ![]() Oil-filled radiators may be slower to heat up than fan heaters, but they are also slower to cool down, so they are ideal for keeping the temperature constant. After heating the room to the desired temperature, it silently regulated the output of the heater to keep the temperature steady. I also found that the thermostat worked well. The Radia was not as quick to heat as the fan heaters that we tested – it takes longer to warm the things around it, even at the highest of the three power settings. Oil filled radiators are more economical to run because they retain. For example, if you have a1500 W heater the maximum it will use is 1.5 energy units per hour. However the maximum the heater will cost will per1 unit of electricity per hour, per kilowatt of heat. The fins on the radiator distributed the heat quickly, and perhaps more importantly, kept fingers away from the really hot parts between the radiator blades. It depends largely on the type of house, size of room and quality of insulation. That took about five minutes, though, so it isn’t great for when you come in from the cold. I found that the DeLonghi Radia S performed excellently, heating my test room quickly once the oil in the system got heated. ![]() (Image credit: DeLonghi) DeLonghi Radia S Eco Radiator Heater review: performance ![]()
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