Oil Filled Radiator vs Convection Heater: What to Source

You're sourcing heaters for a market that's split between two technologies, and you need to know which one to bet on. I've spent 15 years building both types in our factory, and the answer isn't "one is better." It's "which one fits your customer's room, usage pattern, and electricity price."

Let's cut through the marketing noise. Oil filled radiators and convection panels both heat a room, but they do it differently. That difference changes everything about how the heater feels, costs to run, and where it should be installed.

How Each One Actually Heats

A convection heater pulls cold air in at the bottom, passes it over a heating element, and pushes warm air out the top. No fan. The air moves by natural convection. It heats the air directly. The room warms up fast, but the air cools quickly once the unit cycles off.

An oil filled radiator heats a thermal fluid inside sealed metal fins. The oil holds heat. The metal surface gets hot, and that heat radiates outward and also warms the air around it. The room warms slower, but the heat lingers. Turn it off and the fins keep throwing heat for 20 to 30 minutes.

That's the core difference. If your customer wants quick warmth in a drafty living room, a convection panel wins. If they want steady, even heat that doesn't dry out the air, the oil filled radiator wins.

Real Numbers: Wattage, Cost, and Comfort

Let's talk about actual power. A typical wall mounted electric heater for a bedroom runs around 500W to 1500W. An oil filled radiator for the same space usually starts at 600W and goes up to 2500W for larger models.

Here's the catch: wattage is wattage. A 1500W convection panel and a 1500W oil radiator draw the same electricity. The difference is how long they run. A convection heater cycles on and off more often because the air temperature fluctuates. An oil filled radiator runs longer but stays on less frequently, because the thermal mass holds temperature. In a well-insulated room, the oil radiator often ends up using less energy over a full day.

But in a room with poor insulation or high ceilings, the convection heater will cycle on and off constantly, and the oil radiator will struggle to keep the space warm at all. Neither is truly an energy efficient electric heater in that scenario. The building envelope matters more than the heater type.

Real Buyer Search: oil filled radiator vs convection heater

I see this search term in our analytics every week. Distributors want to know which one to stock. Here's my blunt advice: stock both, but know your market.

If your customers are in the UK or Northern Europe, where energy prices are brutal, oil filled radiators sell well for bedrooms and living rooms. People there understand running costs. They want a heater that feels warm for hours after it shuts off. They're willing to wait 15 minutes for the room to warm up.

If your customers are in North America or Australia, where rooms are often bigger and people want instant heat, convection panels are easier to sell. They're also lighter, cheaper to ship, and easier to mount on a wall. A wall mounted electric heater is a no-brainer for a rental apartment or a home office.

One more thing: oil filled radiators are heavy. A 2000W unit weighs 15 to 20 kg. Shipping costs eat into margins. Convection panels weigh 3 to 5 kg. If you're doing private label and need to hit a price point on Amazon, convection is the safer bet.

What About Safety and Certifications?

Both types are safe if built properly. But there are differences.

Oil filled radiators have a sealed oil chamber. The oil never needs replacing. But if a unit develops a leak, it's a fire hazard. That's why we pressure-test every unit at 1.5 times operating pressure before it leaves our line. We've been doing that since 2009, and we've never had a leak claim.

Convection panels have exposed heating elements inside a metal shell. They need a good thermal cutoff and tip-over switch. For bathrooms, you need IP24 rating on either type. We make convection panels with IP24 as standard for our European buyers. That's a real requirement for electric heater for bathroom IP24 applications.

Both types should carry CE, RoHS, and UKCA if you're selling into the UK or EU. We also do ERP compliance for energy labeling. Don't skip that. If your unit doesn't have the right label, you'll get stopped at customs or have listings pulled.

Which One Is Quieter?

Both are silent electric heater options. No fan, no motor. The only noise you'll hear is the thermostat clicking on and off. If your customer is putting a heater in a bedroom or a nursery, either works. But the oil filled radiator has a slight edge because it doesn't cycle as often, so the clicking is less frequent.

We've had buyers ask for a silent electric heater for a yoga studio or a recording room. We point them to the oil filled radiator with a mechanical thermostat. No digital beeps, no relay chatter. Just heat.

Sourcing Reality: MOQ, Lead Time, and Customization

If you're sourcing from China, here's what you need to know. Our standard MOQ is 200 pcs per model. That's low enough for a trial run but high enough to get a decent price. Lead time is 15 to 45 days depending on whether you need custom colors, logos, or packaging.

For oil filled radiators, the MOQ is higher because the tooling for the fins is expensive. We usually ask for 500 pcs on a new oil radiator model. Convection panels are simpler, so we can do 200 pcs and turn it around in 20 days.

If you're a private label brand, you can get your logo on the front, your color on the body, and your packaging. But don't ask for a new heating element design. That's not how OEM works. You choose from our tested platforms, and we customize the cosmetics and controls.

The Honest Takeaway

Don't pick a technology based on what's trending. Pick based on your customer's room and their electricity tariff. Oil filled radiators are for steady, long-duration heating in small to medium rooms. Convection panels are for quick warm-up in larger spaces or where weight and shipping cost matter.

And if you're not sure, order a sample of each. Run them in the same room for a week. Measure the electricity bill. Feel the heat. That's the only way to know for your market.