Square Frameless Premium Silent Inline Fan Kit with Roof Vent – Surfmist 150mm

This complete ventilation kit includes a silent operating and high-performance inline fan designed for discreet installation in your roof space. It comes with a modern frameless ceiling vent, a slim roof outlet, and flexible ducting for easy installation. A built-in backdraft shutter helps improve insulation by preventing heat loss and stopping unwanted drafts.

The inline fan features a built-in dual-speed switch, so you can easily choose between high or low airflow to suit your needs.

With an inline extraction system, large amounts of moist air are vented directly outside instead of collecting in your roof space, helping reduce dampness and moisture buildup.

The flow of air is as follows:

Internal ceiling vent – inline fan – back draft shutter – roof vent.

Installation

The kit is intended as a “do it yourself”, and the fan can be plugged into an available power point in the roof space (connected to a switch in the room). This is usually available in bathrooms, toilets, and the like, or an electrician could install it independently of the system installation.

How to calculate the required air volume

For good ventilation, it is recommended to achieve 15 air changes per hour in a bathroom, toilet, laundry or similar. To work this out, calculate the volume of air in the room ( length x width x height, all in meters) and multiply this by 15 to get the required air volume of the fan. Note this will be adequate in most situations. We recommend that those clients who have a lot of glass or have warmer, longer showers or simply prefer a minimum of steam/moisture get a fan with double or more the recommended capacity.

About the Roof Vent

To learn more about how to install the product, view the comprehensive installation manual below or find more details in the spec sheet.

Low Profile Roof Vent Installation Manual

Low Profile Roof Vent Specifications Sheet