Delonghi TRD40615E Review

Oil-filled radiators, also known as oil-filled heaters, oil-filled panel heaters, or column heaters. They are a prominent type of convection heater used in homes. It is filled with oil, which is utilized as a heat reservoir rather than a fuel, and oil-filled radiators are heated by electricity.

What Are Oil-Filled Radiators and How Do They Work?


Metal columns with cavities in electric oil-filled radiators allow heat to flow easily around the heater. It operates by heating a reservoir of thermal oil inside the machine with an electrical heating element. The electrical heating element is totally immersed in the oil and heats it.

It transfers heat to the metal wall by convection, then to the walls via conduction, and finally to the surroundings via air convection and thermal radiation.

A heated liquid is also used to convey warmth across the surface of oil-filled radiators with central heating models. The sole difference is that an oil-filled radiator uses its internal heating element to warm the liquid inside. 

Heating System 

Whereas a central heating radiator relies on an interconnected system of pipes and uses a boiler to warm up externally to the equipment. An oil-filled radiator’s heating element is similar to a coil of metal-protected wire put into the base.

When a radiator applies an electric current, the electrons collide and flow along the limited length of wire, causing friction and heat. When the wire heats the oil, it transfers heat to the radiator body. 

It subsequently uses air convection to heat the space. The working procedure may differ from one manufacturer to the next, but the core steps will always be the same.

Benefits of Oil-Filled Radiator Heater

When you think of an oil-filled radiator, what comes to mind? Is it a dependable, portable backup for when your central heating fails, or a sleek and beautiful wall-mounted option with cutting-edge technology? 

Oil-filled electric radiators come in a variety of forms, but they all have one thing in common: they’re all popular and sought-after home heating options. There’s a reason they’re one of the most popular electric heaters. 

If you’re not sure what they can do for you, here are three of the most important advantages of oil-filled electric radiators.

Oil-filled heaters have lower running costs

In practice, the increased heat retention of oil implies that your electric radiators will be more energy-efficient and, as a result, less expensive to run. If you have fixed radiators with advanced digital programming, you may save even more money by arranging a heating schedule for each room in your home. 

Each unit has controls built-in, allowing you to build a custom heating schedule for each room based on how it is used on a regular basis. Fixed oil-filled electric radiators have precise digital thermostats, many of which are ​accurate to within 0.2 or 0.5 degrees Celsius, preventing overheating.

Oil-filled radiators are so cost-effective as a home heating solution because of their heat-retaining characteristics combined with accurate digital thermostats.

They provide easy control.

Oil-filled electric radiators have something for everyone, whether you just need a backup heater for emergencies or an energy-efficient system you can rely on on a daily basis. 

You can choose between basic manual control or complex programming. Whatever the case may be, we’re confident that an oil-filled electric radiator will meet your requirements. 

Oil-filled radiators provide a long-lasting, soothing warmth that you can enjoy over longer periods of time. As opposed to fan heaters, which are noisy, inefficient, and can emit an unpleasant odor when dust burns on their exposed parts.

DeLonghi TRD40615E Review

The DeLonghi TRD40615E may be one of your finest options if you’re looking for a high-quality oil-filled space heater with sturdy construction, modern style, and the ability to heat small to large rooms. We’ll go over its features, specifications, and benefits today.

About DeLonghi TRD40615E Oil-Filled Heater

The DeLonghi TRD40615E is an oil-filled radiant space heater that will wow you with its gorgeous design, quality, usability, and safety features, in addition to its heating powers.

This 1500W oil-filled space heater produces 5120 BTUs and has three heating modes, including an ECO mode, for greater temperature control. With the 24-hour timer, you may program the heater to give heat for as long as you want. Simply put, the heater is really useful, simple to operate, and energy-efficient.

See Where DeLonghi TRD40615E Ranks in Our Best Oil Filled Radiator Heater


The radiant heater’s design is sleek and basic, with a black control panel at the front, as you can see in the image above. Its design is substantially different from that of traditional oil-filled heaters. 

The DeLonghi company introduces a new original and revolutionary design with this heater, whose goal is to improve the efficiency of heating a space while using less energy.

Flat-panel heaters have a 25% larger heating surface area than oil-filled heaters in the same class. This heater has the ability to transfer heat in two ways: convective and radial. This is a significant advantage.

You’ll also appreciate the additional feature of the thermal chimneys on the heater’s top surface, which improves heating efficiency. They even contribute to the heater’s contemporary style. 

Thermal chimneys speed up the flow of heat out into the space while also keeping the surface temperature of the heater very low, making it safe to touch.

LCD Display

The LCD screen, adjustable thermostat, variable heat settings, and the 24-hour easy programmed timer are all located on the front of the user-friendly and elegant black control panel.

24 Hour Timer

One of the characteristics of the heater that we all like is the timer. We’ll be able to arrange for the heater to switch off after a specified amount of heating time with the help of the timer.

You can also program the heater to turn off for a certain number of hours before turning itself back on. The timer allows the heater to be set for a maximum of 24 hours, ranging from 0.5 to 24 hours.

This allows you a lot of flexibility in terms of managing not only the room’s temperature but also your electricity use. You may also keep track of your finances at the same time, which is very beneficial in the winter.


Its dimensions are 16.4 inches long, 10.3 inches wide, and 26.1 inches high, which are equivalent to most oil-filled heaters. Its base weight is 26.6 pounds (about 12 kg), making it slightly heavier than other models in its class.

Three Heating Modes + ECO mode.

This DeLonghi heater comes with three different heating settings to help you achieve the most accurate temperature in your room: 700 Watt Low Mode, 800 Watt Medium Mode, and 1500 Watt High Mode.

The functioning indicator is also a great feature that we think you’ll enjoy. The indicator changes color depending on which mode the heater is in, for example:

  • The functioning indicator will turn red if the heater is operating at maximum power.
  • The indicator will be yellow when the heater is set to a medium setting.
  • The indicator will turn green when the heater is set to the lowest heating mode.

In addition to these three heating modes, the heater also has an ECO mode that can be selected as needed. When in Eco mode, the heater will automatically change the most appropriate power level to achieve the ideal room temperature while using significantly less energy.

Delonghi Trd40615e Safety Features

This DeLonghi TRD40615E oil-filled heater comes with a number of safety features, including:

Overheat Protection

If the indoor temperature exceeds the permitted limit, the device will be turned off promptly by the overheating feature. This is highly helpful in preventing unwelcome events.

Anti-Freeze Function

Another vital safety element to include in a space heater is the anti-freeze function. If the temperature in the room dips below 41 degrees Fahrenheit (5 degrees Celsius), the heater will automatically switch to the highest heating mode to keep the room from freezing.

Malfunction Diagnostic System

A diagnostic mechanism that identifies failures like these is a very unique and good safety element that most heaters lack.

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Probe Malfunction 

If the gadget does not operate on the LCD display for some reason, the “PF” indication will appear. You will need to contact De’Longhi Customer Service in this scenario.

High Temperature 

If the device’s internal temperature becomes too high, the display will show “HT” and the heater will gradually reduce its heating power, bringing the temperature back within the safe range. The “HT” indication on the display will disappear once the temperature within the heater has been regulated.

Delonghi TRD40615E Specifications:

  • Configuration: Heater
  • Control Type: Electronic
  • Display Type: LCD
  • Heater Type: Portable Heater, Radiator Heater
  • Installation Type: Portable
  • Overheat Protection: Yes
  • Programmable: Yes
  • With Casters: Yes
  • Zero Clearance: No
  • Frequency: 60 Hertz
  • Fuel Type: Electric
  • Hardwired: No
  • Heating Area: 144 sq. ft.
  • Voltage: 120
  • Wattage: 1500, 700, 800
  • Eco Friendly: Yes
  • Manufacturer Warranty: 1 Year

What We Like About Delonghi TRD40615E

  • This is an oil-filled heater that saves energy.
  • It has innovative pre-assembled castors for easier movement around the house.
  • Unique and cutting-edge design
  • 1500W heating capacity
  • There are multiple heating levels available, as well as an ECO mode.
  • Handle for easy transport
  • Chimneys that emit heat
  • Safety features include overheating protection, anti-freeze function, and a malfunction diagnostic system 
  • Convenient 24-hour programmable timer 
  • Comes with a holder for the power cord
  • Portable

What We Don’t Like

  • The heater, which is normal for oil-filled heaters, takes some time to heat up the room.
  • When the heater is turned on for the first time, it emits a distinct stench, which is a frequent problem with all new heaters. After the first or second usage, the odor will be gone.
  • This heater does not come with remote control, which is surprising for a high-quality heater like this one.

Final Verdict


This DeLonghi TRD40615E review reveals that this is a high-performance radiant heater with a novel, clean, and modern design that will blend in seamlessly with your home’s decor.

It has a heat output of 5120 BTUs, which is sufficient to heat any space, small or large. Furthermore, it is quiet, safe to use, has excellent portability, and, thanks to its built-in ECO mode, it will lower your electricity use and save you money.

As you can see, the DeLonghi trd40615e is a full-room radiant warmer with a few downsides, although having many beneficial qualities like other heaters. That doesn’t mean it is not worthy of your investment.

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