DeLonghi TRD40615E Dragon Oil Filled Radiator Heater Review

Ben Leonavicius
By Ben  • Updated:   October 26, 2023
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The TRD40615E Dragon oil-filled radiator is a premium full-room radiant heater from DeLonghi and truly looks and feels like a high-quality product, with a solid construction, high material quality, and beautiful styling. And, like all DeLonghi space heaters, the Dragon comes with a full 3-year manufacturer’s warranty! But is the DeLonghi TRD40615E Dragon oil-filled radiator a good space heater?

Let’s find out, by exploring the TRD40615E and how it works, talking about our own experience using the heater, and looking at reactions to the heater from verified customers as well.

Our Pick
De’Longhi DeLonghi TRD40615E Full Room Radiant Heater
$179.95 $149.00
Buy Now on Amazon
We earn a commission if you click this link and make a purchase at no additional cost to you.
05/17/2024 12:34 pm GMT

Is DeLonghi a Good Company?

DeLonghi (or De’Longhi) is best known for its beautiful espresso machines, coffee makers and coffee grinders, and, well, all things coffee, and is considered one of the finest companies, and an obvious choice for top quality, coffee shops, restaurants, and private homes all around the world.

But DeLonghi also makes some of the finest products beyond coffee – if there is indeed a world beyond coffee – including kitchen appliances of all types, air conditioners, heaters, air purifiers, and more.

If you’ve ever priced a DeLonghi espresso machine, you know that they are pretty darned expensive – and we would fully expect this for such superb and absolutely stunning products. And the same is true of many of their brilliantly styled and beautifully made home appliances.

That’s why we are so pleasantly surprised that the DeLonghi oil-filled radiator heaters are so reasonably priced – in fact, while not cheap, they’re competitively priced compared to other space heaters, and outright bargains considering how well they are built and how well they work.

What is an Oil-Filled Radiator Heater?

First invented and developed by DeLonghi, and now often imitated, an oil-filled radiator heater is a radiant heater, similar in many ways to any other radiator heater, but with an important basic difference in design which allows it to be very efficient and also to output a deeply warming and wonderful feeling heat, which somehow feels better than what you get from so many other radiant heaters. 

An oil-filled heater is different in that it’s, well, oil-filled.

It has a permanently sealed internal reservoir that extends throughout the heating fins and contains diathermic oil, which heats up with the heater and maintains that heat over long periods of time, only cooling down very slowly.

This system holds heat so well that an oil-filled radiator heater can save lots of money on utility bills compared to even other radiant heaters – which are already known to be very, very energy efficient and real money-savers. Plus, oil-filled heaters still enjoy all of the main benefits of normal radiant heaters, including:

  • Uniform, Consistent Heating
  • Quiet Operation
  • No Maintenance
  • Less Expensive than many other types of heaters
  • Deep Heating and Comfort
  • Better Air Quality and No Allergens
  • Makes the Air Less Dry than many other types of heaters
  • And, again, Real Savings on Utility Bills!

Does DeLonghi make a Good Oil-Filled Full-Room Radiator Heater?

Our Pick
De’Longhi DeLonghi TRD40615E Full Room Radiant Heater
$179.95 $149.00
Buy Now on Amazon
We earn a commission if you click this link and make a purchase at no additional cost to you.
05/17/2024 12:34 pm GMT

So you must be wondering a couple of things:

  • Is the DeLonghi TRD40615E Dragon a Good Oil-Filled Radiator Heater?
  • Is the DeLonghi TRD40615E Dragon Worth the Money?

The second question may especially be on your mind since the TRD40615E Dragon is a fairly pricey product, and there are certainly less expensive radiator heaters on the market.

That said, the DeLonghi TRD40615E Dragon oil-filled radiator has a real premium look and feel, and at least appears to be worth the money. And in terms of heating effectiveness, the Dragon is definitely one of the best space heaters we’ve ever tested.

And not just heating, but all aspects of operation with the DeLonghi TRD40615E were first-rate – just what we’d expect from a premium product in every way!

What is Our Experience with the DeLonghi TRD40615E Dragon Oil-Filled Radiator Heater?

Since we’ve had experience with lots of oil-filled radiator heaters in the past, the first thing we did with the DeLonghi TRD40615E Dragon is to set it in our garage and run it for a full day out there, allowing the initial smell to burn off completely before using the heater in our house.

After that, we could never detect even the slightest odor when using the Dragon inside the house. Our experience with all types of radiant heaters helped us with another issue some customers had – that is, a few people talk about how long this, or any radiant heater, can take to heat up their space, especially a larger space.

This is absolutely the nature of radiant heaters, though, even the best full-room heaters like this one, and if you can be patient and allow them a few hours to fully radiate heat into the room, you will see what wonders they are actually capable of.

We found that the DeLonghi TRD40615E Dragon full-room oil-filled radiator is easily capable of keeping a small or medium-sized room really warm and cozy (even much larger than DeLonghi, in their typically conservative specifications, indicates).

When we really kept it running, over the long term, even our largest rooms began to feel warm all the way through. And maybe our main impression of the DeLonghi TRD40615E Dragon is the heat itself and how much we loved how it feels.

Here at Home Caprice, we have always been big fans of radiant heat – with its deep-down heating and a stable temperature it just feels better to us, and it is less drying, and more efficient (read less expensive) than many other types of heaters, but the DeLonghi oil-filled heaters, in particular, feel absolutely incredible, keeping us so deep-down warm and satisfied, but never overly hot.

While we have found that all kinds of heaters, and even some other DeLonghi oil-filled radiators, can be a little noisy when they first startup (an issue of the metal slightly expanding with heat), the DeLonghi Dragon doesn’t seem to have this issue at all and was always completely silent running.

The sophisticated control panel on the DeLonghi TRD40615E Dragon oil-filled radiator is wonderful to use. Sometimes we find that more advanced electronic controls can be more difficult to use, or at least to get used to, but the clearly marked buttons and easy-to-read display of the Dragon were so obvious and intuitive that we didn’t even have to consult with the user’s manual to know what we were doing.

The controls also just feel really nice – solid, smooth, and easy to press, with just the right amount of feedback so we knew they had worked and with a feeling of premium material. In fact, in general, this is one of the most striking things about the DeLonghi Dragon radiant heater, it just looks and feels so good – obviously high levels of material quality, workmanship, and design, with a feeling that the Dragon will run reliably for years and years, and an overall beautiful appearance.

With an intelligent design, great quality, silent and trouble-free operation, and deep, satisfying radiant heat that fills a wide range of rooms and spaces, the DeLonghi TRD40615E Dragon oil-filled radiator is not only worth the money, but it is also a great value, and we loved using it!

What do Customers Say about the DeLonghi TRD40615E DRAGON  Oil-Filled Radiator Heater?

Customers also absolutely love the DeLonghi TRD40615E Dragon oil-filled radiator, which has very high ratings on Amazon and all around the web, even after thousands of reviews.

One of the most striking things you see in customer reviews and comments is that, while some were worried about spending a little more – even for such a good brand – they found that the DeLonghi TRD40615E Dragon oil-filled radiator actually saved them so much money in the long run that they had no reason to be concerned.

And this ties into the main comment we see from verified customers, that the DeLonghi Dragon works much better than they expected, even in larger spaces, and they found themselves using their central furnace much less and keeping its settings at a much lower level.

People seem to love the feeling of the radiant heat, and in fact, we seem to see more positive comments about the quality of heat from the Dragon than from other heaters of similar design – this definitely correlates with our own experience of just how good the Dragon’s heat output made us and our space feel.

Other comments mentioned how customers like having a heater they totally rely on. With solid construction and quality material, good safety features, total lack of smell or noxious fumes, silent operation, and excellent heat output, people love to be able to just set the DeLonghi TRD40615E Dragon oil-filled radiator up, turn it on, and then forget about it and enjoy the warmth.

And, as we might expect, lots and lots of people just love the beautiful design of their DeLonghi TRD40615E Dragon oil-filled radiator and are pleased with how it looks and how it looks in their homes.

In fact, customers are very impressed with several basic things about the DeLonghi TRD40615E Dragon and all Delonghi oil-filled space heaters, compared to other brands and types of heaters, including:

  • Quality look and feel
  • Quiet operation
  • Ease of use
  • Reliability
  • Clean air and odor-free heat
  • Big savings on utility bills, even compared to other space heaters
  • Beautiful design
  • Great Warranty and Customer Service

As far as negatives, we didn’t see as many people talk about how long it takes for the DeLonghi TRD40615E Dragon oil-filled radiator to heat a room – a common issue with many space heaters (which can take time to really fill a space with heat but, once there, are excellent at maintaining that heat efficiently and inexpensively).

We also saw fewer complaints about the small clicking noises that can be heard when a heater first starts up. But neither of these things surprised us – when people are as happy with a purchase as folks seem to be with the Dragon, they simply find less to complain about.

People tend to be fiercely loyal to DeLonghi as a company, and to their products, and the heaters are no exception. Indeed, we see more repeat customers for DeLonghi space heaters than maybe any other company – even more remarkable considering that customers tend to have them for many years!

DeLonghi TRD40615E DRAGON  Oil-Filled Radiator Heater Pros and Cons

✅ Pros❌ Cons
Extremely Energy Efficient – saves money even compared to other oil-filled space heatersEmits an odor when you first use it
Deep, Warm, Even-Heat & Effectiveness in Larger Spaces than ExpectedVery few people mention this and acknowledge that the odour goes away right away – after the ‘burn-in” period, and doesn’t come back. 
Quiet, even Silent, Operation & Ease of Use and Intelligent Design 
Cleaner Running, Odorless and No Noxious Emissions & Very High Material and Build Quality and Extreme Reliability 
Beautiful Modern Styling 
Complete Safety Features 
Great Warranty (3 Years) and Customer Service 

Features & Specifications

  • Heating Element: Electric
  • Heating Type: Oil-Filled Radiant 
  • Heating Power: 700, 800 and 1500 Watts
  • Effective Heating Area: 250 Square Feet (~23 Square Meters)
  • Safety Features: Smooth, Cool-Touch Surfaces; Auto-Off for Tip-Over or Overheating
  • Sophisticated Electronic Control Panel and Display
  • Built-In Room Thermostat
  • 24 Hour Programmable Timer
  • Anti-Freeze Circuitry
  • Rust-Resistant Durable Metal Construction
  • Integrated Power Cord Spool & Heavy-Duty Caster Wheels
  • Size: 16.4 x 10.3 x 26.1 Inches 
  • Weight: 26.6 Pounds
  • Warranty: 3 Year Limited Manufacturer’s Warranty
Our Pick
De’Longhi DeLonghi TRD40615E Full Room Radiant Heater
$179.95 $149.00
Buy Now on Amazon
We earn a commission if you click this link and make a purchase at no additional cost to you.
05/17/2024 12:34 pm GMT

Final Thoughts: Should You Buy a DeLonghi TRD40615E DRAGON  Oil-Filled Radiator Heater?

Any good radiant heater is a great idea these days – they help us stay warm as winter approaches, and as we are spending so much time at home recently they are especially important and nice to have. A good space heater will also save us lots of money on utility bills since we can heat only one space or room in our home, and keep the furnace running at a much lower level.

Of course, you can get a less expensive space heater, but for this level of quality in materials and construction, for its great design and appearance, its ease of use, its effectiveness, and the wonderful feeling of its warm oil radiant heat, the DeLonghi TRD40615E Dragon oil-filled radiator is well worth the money.

And when you consider how much money the DeLonghi Dragon will save you on your utility bills, it is actually quite a bargain.

Hey there! I am Benas, the founder and content editor at Home Caprice. Thanks for reading the article. I hope you were able to find what you were looking for. I and my team are here to simplify heating and cooling for everyone. Please have a look at the About page for more details about our website and feel free to check out our editorial process.