A 3-in-1 bathroom heater combines a light, an exhaust fan and a heater in a single ceiling unit. It clears steam, warms the room and lights the space, saving room and simplifying installation compared with three separate fittings. Newer 4-in-1 and 6-in-1 models add cooling or air circulation on top.

Extraction is measured in m³/hr and should match your room size. As a rough guide, a 5m³ bathroom needs around 100m³/hr, a 10m³ bathroom around 200m³/hr, and a 20m³ bathroom 400m³/hr or more. Use our exhaust fan calculator for an exact figure for your room.

Infrared R7s heat tubes give instant, intense radiant warmth but draw more power and the globes need replacing every few years. Ceramic and PTC heaters circulate warm air, hold heat after switch-off and have no globes to replace, making them the lower-maintenance, more modern choice.

In a small to medium bathroom a bright unit of around 1200 to 1700 lumens can serve as the main light. In larger bathrooms we recommend adding downlights, especially over the vanity, as you want roughly 500 to 600 lumens per square metre.

Most 3-in-1 units must be hard-wired by a licensed electrician. Some models, such as the Fantech Response Radiance, are plug-and-play with a wireless switch for easier DIY installation. Always check your ceiling depth and the unit's clearance requirements before buying.

Yes. Strong extraction removes steam and moisture before it condenses on cooler walls, ceilings and windows, which is what leads to mould, mildew, peeling paint and timber decay. Choosing the correct extraction rating for your room size is the key to preventing it.