Experts recommend oil-filled, radiator-style heaters for well-insulated rooms where the heater will be on for long periods of time. Like other heaters of this type, the DeLonghi TRD0715T Oil-Filled Radiator with Timer takes quite a while to heat up initially, but then provides steady, quiet heat. Users also appreciate the convenience of the DeLonghi heater's programmable timer. It's the top-ranked heater of this type, but we found many reports of quality-control issues -- in particular, some units that give off a chemical odor even after weeks of use. Owners also report that the SafeHeat design sends heat out the top instead of the sides, a feature that some like (because the sides stay cool) but others dislike (because there is no heat near floor level). For quicker heating, consider a space heater with a fan like the Lasko 755320 Ceramic Tower Heater (*Est. $75) or the budget-friendly Lasko 754200 Ceramic Heater with Adjustable Thermostat (*Est. $30) .
We found the best comparison review of the DeLonghi TRD0715T Oil-Filled Radiator with Timer at ConsumerReports.org, where it's ranked in relation to 12 other electric space heaters based on ratings for safety, temperature control, noise and ease of use. The same model (under the name Dragon TRD820T) is also reviewed at Which? magazine, a British version of ConsumerReports.org. We found the most owner-written reviews of the DeLonghi TRD0715T Oil-Filled Radiator with Timer at Amazon.com, but reviews at other sites are also useful.
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Review credibility: Excellent ConsumerReports.org tests and compares 20 space heater models using six testing criteria, including effectiveness of heating a room and capabilities as a personal heater, fire safety, ease of use, noise and surface heat. The DeLonghi TRD0715T is included in the list of larger room heaters.
Review: Space Heaters, Editors of ConsumerReports.org, August 2012
Review credibility: Very Good About 425 owners review the DeLonghi TRD0715T Oil-Filled Radiator at Amazon.com. Most praise its quiet convection heat, but others report a variety of quality-control issues. Some owners say the radiator takes too long to heat up, and others report a persistent bad odor or leaking oil.
Review: DeLonghi TRD0715T Safeheat 1500W Portable Oil-Filled Radiator with Vertical Thermal Tunnels, Contributors to Amazon.com, As of November 2012
Review credibility: Good About 30 owners review the DeLonghi TRD0715T Oil-Filled Radiator. Most owners like it, saying that though it takes a while to heat up, once warm it easily heats a large room. Some reviews point out that the heater can get hot to the touch, and because the coils aren't visible and there's no fan running, it's hard to tell whether it's on. Most Viewpoints.com reviews for this unit are at least a year old.
Review: DeLonghi Portable Oil-Filled Electric Radiator Heater TRD0715T Reviews, Contributors to Viewpoints.com, As of November 2012