For Southeast Asian manufacturers and exporters looking to sell on Alibaba.com, understanding product attribute configuration is critical to matching buyer expectations. The 1500W power rating paired with 10-20㎡ applicable area represents one of the most common configurations in the global electric heater market—but it's not the only option, and it's not always the best fit for every buyer.
What Does 1500W Mean? Electric heater wattage directly correlates with heating capacity. Industry guidelines follow a simple rule: 10 watts per square foot (approximately 107W per square meter) [1]. This means a 1500W heater can effectively heat about 150 square feet (roughly 14 square meters), making it ideal for small offices, bedrooms, or studio apartments. However, real-world performance depends on factors like insulation quality, ceiling height, and climate zone.
- 500W: Personal/desktop heaters (under 5㎡)
- 750W: Small rooms (5-10㎡)
- 1500W: Standard for living rooms and offices (10-20㎡)
- 2000W+: Large spaces (20㎡+) [2]
Why 1500W Became the Default: There's a practical reason behind this standard. In North America and many other markets, standard household circuits are rated at 15 amps at 120V, which equals 1800W maximum capacity. A 1500W heater operates safely within this limit while leaving headroom for other devices [4]. This electrical compatibility makes 1500W the default choice for mass-market products.
Most space heaters don't specify exact square footage. They'll say 'small room,' 'medium room,' or 'large room.' The 1500W models typically fall into the medium category, which works for most bedrooms and home offices [4].
