De’Longhi Comfort Temp Full Room Radiant Heater KH390715CB-6A, Black review

The De’Longhi KH390715CB-6A is a black, seven-fin oil-filled radiator listed for 120 V, 60 Hz operation, with a 1,500-watt maximum and three heat settings. It weighs 22.12 pounds, has a mechanical control panel and moves on caster wheels. Its clearest point of difference is straightforward fanless radiant-and-convection warmth: there is no blower to add a fan-only breeze or carry dust around the room. The maker calls the sealed-oil design quiet, but this is a manufacturer description rather than a measured sound test.

What the three settings do—and do not promise

The product page lists three power settings and a thermostat, but the current U.S. support page says that no instruction manual is available for this exact model. I therefore treat “three settings” as the documented level count without inventing their individual wattages, a thermostat temperature range, or detailed timer behavior. The listing includes anti-freeze protection and a safety thermostat. Those are useful features, but they are not a substitute for the placement and electrical instructions that a model-specific manual would normally settle.

De’Longhi also promotes ComfortTemp as a way to reduce energy use compared with running the same heater at its maximum thermostat setting. That comparison is the company’s claim, not a measured saving I can reproduce. A 1,500-watt plug-in heater still draws that full listed maximum when operating at it. Choose this model for its control style and type of heat, not a promised lower bill or a room-size guarantee.

Placement matters more than the radiator’s coverage phrase

The U.S. page lists a “working capacity” of 2.15 m² (about 23.2 square feet); it does not present that value as an independently tested room-heating result. Treat it as a manufacturer listing detail, not proof that the radiator will comfortably heat an entire room, especially one with drafts or poor insulation. Its body dimensions are printed as 5.9 × 13.8 × 24.8 inches without assigning those numbers to height, width and depth. Measure the actual space and keep all operating clearances separate from the cabinet measurements.

The exact support listing has no manual, so bathroom approval, outdoor use, minimum room area, separate numeric clearances, outlet-strip rules, extension-cord permissions and unattended-use guidance remain unknown here. Unknown is not approval. Use the heater only in a dry indoor position where it can stand upright on a stable floor, keep it away from fabrics and furniture, and follow any complete instructions supplied with the exact unit before use. Do not infer those clearances from a similar-looking EW7707 or another ComfortTemp radiator.

Where it sits among De’Longhi radiators

The closest comparison is the seven-fin EW7707CM-6A, which has a similar mechanical, fanless design but a different listed weight and cabinet dimensions. The KH page calls out a 22.12-pound body and SmartSnap caster assembly; the EW page lists 23.37 pounds and a 5.9 × 13.78 × 24.9-inch envelope. Those exact differences can matter for storage and moving, but they do not establish a performance advantage. A shopper who needs a documented delayed start or a verified auto-off should instead compare a digital radiator such as the white TRD40615E-6A, whose linked instructions describe both timer functions.

In an ordinary questionnaire, select indoor floor use and fanless heating if you want a quiet-style radiator without forced airflow. Do not select fan-only: this model does not circulate unheated air. Three heat levels can meet a requirement of at least three documented levels, but not four. If your choice depends on a strict room-size limit, bathroom use, a numerical clearance, or a confirmed timer, the available exact-model evidence does not establish that fit.

Who should consider it?

Consider the KH390715CB-6A when you want fanless heat from a portable radiator, mechanical controls and three manufacturer-listed power positions, and you can make room for a fairly heavy caster-mounted unit. A shopper who prioritizes the lightest equipment, timer scheduling, a remote or phone control should compare other types instead. Check the full model and SKU 0108390303 before purchase: the similarly sized EW7707CM-6A is a separate configuration, not a manual substitute. The product gallery shows the black finish, but it is not a hands-on photograph or proof of the heater’s performance.

De’Longhi KH390715CB-6A product page · Exact-model U.S. support listing