Wall Mounted Electric Heater Sourcing Guide for B2B Buyers

Most buyers who come to us for wall mounted electric heaters ask the same first question: what wattage for a 20 square meter room? The honest answer is 1500W to 2000W in a well-insulated space. If the walls are single brick or the ceiling is high, go 2000W. We've built these panels since 2009, and that rule hasn't changed much.

Convection vs. Oil-Filled: What Your Customers Actually Get

A wall-mounted convection panel heats air fast. You feel warmth in 5-10 minutes. But when the thermostat cuts power, the heat stops. An oil-filled radiator keeps radiating for 15-20 minutes after shutoff. That's why the oil filled radiator vs convection heater debate never dies. For a bedroom, oil-filled wins on comfort. For a hallway or bathroom, convection wins on speed and lower unit cost.

We make both. The convection panel is a stamped steel body with a finned element. The oil-filled unit needs a welded tank, pressure test, and oil fill. That extra step adds about 15% to the factory cost. Your retail price gap should reflect that.

The Thermostat Is Where Cheap Units Fail

A mechanical bimetal thermostat is fine for a garage. For a living room, buyers expect a digital thermostat with 0.5°C accuracy. We see returns spike when a unit overshoots by 3°C. That's not a heater problem, it's a thermostat problem. If you're sourcing a best electric heater with thermostat, insist on a digital model. The cost difference at the factory is under $2. Your return rate will drop.

IP Ratings and Real-World Placement

A bathroom heater needs IP24 minimum. That means protected against splashing water from any direction. We mold a gasket around the control panel and seal the element ends. Don't accept IP21 for a bathroom. It will fail in a steamy room. For a workshop or garage, IP20 is fine. For an RV campervan, you need 12V or a 220V unit with a sturdy mounting bracket. Vibration kills cheap brackets.

Silent Operation: Not All Heaters Are Equal

A convection panel has no fan. It's completely silent. An oil-filled radiator is also silent. A fan heater moves air and makes noise. If your customer wants a silent electric heater for a bedroom, sell them a panel or radiator. Don't sell them a fan unit and expect a good review.

Wattage, Running Cost, and the Energy Label

A 2000W heater running at full power for 1 hour uses 2 kWh. At $0.15 per kWh, that's $0.30. But a thermostat cycles the unit. In a 20 square meter room, a 2000W panel might run 30 minutes per hour after warm-up. That's $0.15 per hour. Compare that to a 1500W oil-filled radiator: lower draw, longer run time, similar total energy. The energy efficient electric heater label comes from how well the thermostat controls the duty cycle, not from the wattage alone.

We test every model to ERP Lot 20. That's the EU standard for local space heaters. It requires a 30% reduction in standby power and better thermostat control. If your supplier can't show an ERP test report, walk away.

Certifications and MOQ: What to Expect

CE and RoHS are mandatory for the EU. UKCA for the UK. We build to those standards daily. A typical MOQ for a private label electric heater is 200 pcs per model. Lead time is 15-45 days depending on whether you need custom packaging or a new mold. A new injection mold for a plastic front panel adds 25-30 days and $3,000-$5,000. If you're testing a market, use our existing tooling and put your logo on the carton. That keeps MOQ at 200 and lead time at 15 days.

Wiring and Plug Types

A 2000W heater draws about 8.7A at 230V. That's fine for a standard 13A UK plug or a 16A EU plug. But a 3000W unit needs a dedicated circuit. Don't let your customer plug a 3000W heater into a 10A socket. We put a warning label on every unit. You should too. For 12V RV units, the current is higher: a 300W 12V heater draws 25A. That needs thick cables and a good ground. We use 12 AWG wire on our RV models.

The Honest Takeaway

Don't chase the lowest factory quote. A $2 difference in thermostat quality can cost you $20 in returns and a bad review. Buy a sample. Run it in a cold room for a week. Check the thermostat accuracy with a separate thermometer. If it overshoots by more than 1°C, reject the batch. That's the difference between a heater that sells and a heater that comes back.