The Best Bathrooms Breathe

Whether you are building new or remodelling a bathroom, it is important to consider how the bathroom will be ventilated. If not extracted effectively, steam will very quickly create mould & mildew on ceilings, sills and walls and the bathroom will feel cold and damp.

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Match the Fan to the Room Size

The size of the room is fundamental for choosing a fan that can effectively remove steam.

Bathrooms require 11 – 15 ‘Air Changes per Hour’ to effectively remove steam. ‘ACH’ indicates the airflow rate sufficient to remove/replace the total volume of air in a room, at a specified number of times each hour.

To find the ‘ACH’ calculate the volume of a room in cubic metres (m3) by multiplying the length x width x height. For example: 2.8m x 2.6m x 2.4m = 17.47m3.

Multiply the volume 17.47m3 x 15, the recommended air changes per hour to calculate the fan performance required to effectively ventilate the room. The result in this example requires a fan performance of 262/hr.

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Place Fans Close to the Source

To achieve optimum steam extraction, use fans that can be placed close to the source, either over or near the shower. For example, for larger shower heads the 150mm FAN0101 from Manrose is a complete in-line kit option that removes steam effectively with an impressive performance rate of 394m3/hr.

We have a large range of fan options including in-line kits, wall or ceiling mount, thru-wall kits and combination heat and heater/fan/lights. The fan option best for your needs will be determined by the physical layout and design of the bathroom.

Improve Performance with Make Up Air

To ensure maximum airflow performance, “make up air” is required for a fan to function efficiently. This is simply air that replaces the air that is being extracted and can be achieved with a gap under, or a grille in the door to draw from an adjacent room or hallway. Best practice is to position the fan to draw make up air directly past the main path of steam during extraction for optimal ventilation.

Extraction, Heat & Light

The addition of combination heat fan/light units, give extra warmth and light to larger bathrooms. Primarily added for the heat lamps, they provide direct warmth below, so are best placed near the basin or close to a bath where the occupant will stand to brush teeth, apply cosmetics or towel off.

These units also offer the convenience of extra light, when the heat component is not required. Supplementary ventilation is included. Manrose has a 4-heat lamp version, best suited to complement dedicated extraction fans in larger bathrooms, or a 2 heat lamp model with ventilation suitable for an ensuite or smaller bathroom. The Manrose Designer LED HFL models offer higher levels of extraction in a stylish linear unit.

Stronger, Quieter Extraction from Manrose

Manrose extraction fans include high quality ball bearing motors to ensure longevity of operation
and are supported by a five-year warranty. And with new improved engineering, the performance of many
150mm fans is increased to 109l/s (394mhr) a quiet 38dB and a low 27 Watts – offering you the greatest fan for your bathroom.

Recommended by
NZ Electricians

Prolonged life
ball-bearing motors

Supported by a
five-year warranty