Martec Flow Exhaust Fan

What is the Martec Flow exhaust fan range

Martec Flow is a small exhaust fan range from Martec, built for bathroom ventilation rather than general air circulation. An exhaust fan is different to a ceiling fan: instead of moving air around a room, it actively pulls moist, humid air out of the bathroom and expels it outside or into a duct system. With 4 products in the range, Flow offers a compact but purpose-built selection for bathrooms needing effective moisture extraction.

Why bathrooms need an exhaust fan

Bathrooms generate a lot of moisture from showers and baths, and without proper extraction that moisture settles on walls, ceilings, mirrors, and grout. Over time, trapped moisture is one of the leading causes of mould growth in bathrooms, along with musty odours and damage to paint and plasterboard. An exhaust fan addresses this directly by removing humid air at the source, rather than relying on an open window or door, which is not always practical or effective, especially in bathrooms without external walls.

Buying considerations for exhaust fans

Choosing the right exhaust fan comes down to a few practical factors rather than style alone:

• Extraction rate suited to room size: an exhaust fan needs sufficient extraction capacity for the volume of the bathroom it is installed in. A fan that is undersized for the room will struggle to clear moisture effectively, so check the specification against your bathroom's dimensions
• Ducted vs wall-vented installation: some exhaust fans vent directly through an external wall, while others connect to ducting that runs to an outside vent, often through the ceiling. Which option suits your bathroom depends on its position in the house and whether ducting is already in place or needs to be installed
• Whether a light is included: some exhaust fan units combine ventilation with a light fitting in one unit, which can simplify installation in a bathroom where both are needed, while others are ventilation-only and pair with a separate light fitting
• Noise level: because exhaust fans run every time the bathroom is used, quieter operation is worth checking if the bathroom is near a bedroom or living area

Who the Flow range suits

A small, focused range like Flow suits bathrooms needing straightforward, reliable extraction without the need to compare an extensive catalogue of options. It is a practical choice for renovations or new bathroom builds where moisture control is a basic requirement rather than a complex ventilation project.

Getting the installation right

Because exhaust fans rely on either direct wall venting or a ducted connection to the outside, confirming which installation method suits your bathroom's layout before purchasing is one of the most important steps. A fan that cannot be properly vented to the outside will not perform its core job of removing humid air, regardless of its extraction rating.