A DeLonghi ComforTemp oil-filled radiator provides electric room heat through a sealed radiator body. It may suit someone who wants adjustable, fanless supplemental heating, but it needs a suitable outlet, clear floor space and attentive use. This review examines documented features rather than claiming a hands-on test.
Check which ComforTemp model you have
DeLonghi’s EW7707CM-6A product page specifies 1,500 watts, three heat settings, an adjustable thermostat, preassembled wheels and thermal shutoff. Confirm the model suffix and electrical rating on your unit; an older review title does not identify every version.
The sealed oil transfers heat inside the appliance; it is not fuel that the owner replenishes. DeLonghi states that the reservoir never needs refilling. Do not open it. If oil leaks or the heater is damaged, stop using it and arrange authorized service.
What the controls can and cannot establish
The ComforTemp feature manages temperature and power levels. The manufacturer’s advertised efficiency comparison is against the same unit with its thermostat at maximum and ComforTemp disabled. It does not establish a universal percentage saving on a household heating bill.
Before choosing it, consider whether you want heat mainly in one occupied room, how that room loses heat and where the heater can stand safely. A customer report about a large basement does not prove this radiator will heat your basement or replace a building’s heating system.
A fanless design avoids blower noise, but do not interpret that as a guarantee of silence. The matching EW7707CM-6A/EW7707CB-6A manual notes that creaking can occur during initial operation. Follow its commissioning instructions.
Estimate electricity use correctly
At a constant 1,500-watt draw, one hour uses 1.5 kilowatt-hours. Multiply that by your electricity tariff: at an illustrative $0.20 per kWh, the cost is $0.30 for that hour. Six hours continuously at that draw would be 9 kWh, or $1.80 at the same example rate.
Actual use depends on the selected setting and how long the thermostat calls for heat. These calculations are examples, not a current local tariff or a promise of savings. Compare the complete heating arrangement rather than calling any electric radiator automatically cheap to run.
Hot surfaces and electrical safety
The manual warns that the appliance becomes very hot. Cool-touch controls do not make the whole radiator safe to touch. Operate it upright, keep it uncovered and follow all specified clearances. Do not use it in bathrooms, laundry areas or outdoors.
The U.S. Fire Administration advises keeping combustible items at least three feet from space heaters, plugging electric heaters directly into wall outlets and turning them off before leaving or going to sleep. Keep bedding, curtains and drying clothes away.
Do not use an extension lead or power strip with this radiator. If the plug, outlet or cord overheats or deteriorates, stop use and have the problem assessed. Thermal shutoff is a backup, not permission to ignore placement requirements or bypass a fault.
Do not rely on it as an unattended pipe-protection plan
An anti-freeze setting does not establish the temperature at pipes under a house or inside a remote wall. Power loss, distance and building conditions can defeat that assumption. Have a qualified professional assess vulnerable plumbing; do not place this indoor room heater in a crawl space based on an old testimonial.
For a purchase, verify the exact model, condition, returns and current warranty terms. Its appeal is straightforward supplemental room heating, provided its limitations fit your needs. Compare other types in the space-heater guide.
