Infrared vs Convection Heaters: What Buyers Should Know

A distributor in Germany once asked me why his container of 2000W infrared heaters wasn't moving. His customers loved the instant heat. But they kept returning units because the room never felt warm. That's the classic mistake: confusing radiant heat with space heat. If you're sourcing electric heaters, you need to know which technology fits which job. Here's the no-nonsense breakdown.

How they actually work

Convection heaters heat the air. They pull cold air in, pass it over a heating element, and push warm air out. That warm air rises, cools, and cycles. It takes time to warm a room, but once it does, the whole space is comfortable. Oil-filled radiators are a type of convection heater, just with a thermal mass that keeps giving off heat after the power cuts. Wall-mounted convection panels work the same way, often with a silent operation that buyers love for bedrooms.

Infrared heaters heat objects, not air. They emit electromagnetic waves that warm people, furniture, and floors directly. You feel heat within seconds, but the air temperature barely moves. That's why an infrared heater in a large room feels great when you're standing in front of it, but useless if you're around the corner. It's like sunlight: you feel it on your skin, but the air around you stays cold.

Where each one wins

Infrared shines in spot heating: a garage workbench, a bathroom (with IP24 rating), or a workshop where you're not heating the whole space. They're also great for rapid warm-up in a cold room. But if you need to heat a large room or a bedroom overnight, convection is the better choice. Oil-filled radiators are heavy and slow, but they hold heat long after you turn them off. Wall-mounted panels are slim, silent, and good for offices or basements where floor space is tight.

We've made both for years. Our 2000W oil-filled radiator takes about 20 minutes to warm a 20m² room. A 2000W infrared heater will make you feel warm in 30 seconds, but that same room's air temperature might only rise 2–3°C after an hour. That's the trade-off.

The question buyers always ask: running cost

Everyone wants an energy efficient electric heater. The truth: all electric heaters are 100% efficient at converting electricity to heat. The difference is how you use them. A low wattage electric heater (say 500W) costs less per hour but heats less. A 2000W heater costs more per hour but can heat a larger space. If you're comparing electric heater vs gas, gas is usually cheaper per kWh in most markets, but electric wins on installation cost and flexibility. For spot heating, infrared is cheap to run because you're not heating the whole room. For whole-room heating, convection is more practical.

What to look for when sourcing

If you're an OEM electric heater manufacturer or private label brand, here's what matters:

• Thermostat: A good thermostat is non-negotiable. Mechanical ones are cheap but inaccurate (±3°C). Digital ones cost a bit more but hold temperature within ±1°C. For wifi smart electric heater models, you need a digital thermostat anyway.
• Safety: Tip-over switch, overheat protection, and cool-touch housing. For bathrooms, IP24 is the minimum. We've seen too many cheap imports fail on this.
• Certifications: CE, RoHS, UKCA, ERP. Don't skip ERP. It's not just a label; it affects your ability to sell in the EU.
• MOQ and lead time: Standard MOQ is 200 pcs. Lead time is 15–45 days depending on complexity and whether you need custom tooling. Plan for 45 days if you want a custom color or logo.

Real buyer questions we hear

"Can I use an infrared heater in a large room?" Yes, but only for spot heating. If you want to heat the whole room, go convection.

"What's the best electric heater with thermostat for a bedroom?" A wall-mounted convection panel with a digital thermostat. Silent, no fan noise, and it holds temperature well.

"What about an electric heater for RV campervan?" You need a 12V electric heater or a low-wattage 500W unit. Most RVs can't handle 2000W. We make a 500W convection panel that works well.

"How to choose electric heater for a garage?" If you're only there for an hour, infrared. If you're working all day, convection. And check the wattage: a 3000W fan heater will need a dedicated circuit.

One honest takeaway

There's no single best electric heater. The right choice depends on how you use the space. If you're sourcing for retail, stock both types. Your customers will figure out which one they need, and you'll have the answer either way. Just don't try to sell an infrared heater as a whole-room solution. That's how you get returns.