DIY Subfloor Kit 5 – Premium TT Silent 150mm for area up to 120m3


Product Description

This DIY Sub floor ventilation kit is designed to ventilate a sub floor space of up to 120m3. This is a premium kit and includes the TT Silent inline fan.
This kit includes the following components:

1x TT Silent 150mm Inline fan – Click here for full fan specs
1x 6m of 150mm duct – this can be easily cut to suit your system. If more duct is required please see ‘accessories’ below.
1x External Vent
1x Intake Vent
1x 24hour Timer (The timer is plugged into a standard power point)
1x Flex & Plug (The fan is then plugged into the timer). Flex & plug is wired to high speed. Customers purchasing additional speed controller accessory are advised that the lead and plug will need to be removed so the fan can be hard wired to the switch.
1x Roll of Hanging Tape
1x Roll of Duct Tape

These components were selected because they are suitable for DIY installation. Using this kit in conjunction with accessories which need hardwiring will require installation by an electrician.

Some buildings have very little subfloor ventilation. Inadequate underfloor ventilation can lead to an accumulation of moisture in the sub floor. This in turn can cause structural and health problems for the home and it’s occupants.

The most common reason for inadequate under floor ventilation is that there not enough vents, or they are too small for the size and layout of building. Building extensions, building location and soil type can all contribute to problems in the subfloor.

This underfloor kit is specifically designed to service areas of up to 120 cubic meters.

TT Silent Mixflow Fan Features

  • Premium Kit – Silent Motor
  • Only 33 dB(A) on the high speed (this fan is wired to the high speed)
  • Long life ball bearing motor
  • Suitable for continuous running
  • IP X 4 rated motor
  • Includes mounting brackets
  • Overheating protection with automatic restart
  • Dynamically balanced turbines


Additional information

Extract Capacity (free flow)


Power Consumption On High (Watts)


Noise (at 3m on low)

26 dB(A)

Recommended Subfloor Size (based on 5 air changes)

Up to 111m3

Motor Type

Mixflow – These fans display centrifugal characteristics in sizes of 150mm and above and are generally recommended for moderate lengths of ducting.


Flex & Plug Included (can be plugged into standard power point), Please note: some optional controllers and accessories may not be suitable for DIY installation. Check individual product specifications before purchasing accessories

Type Of Fan


Fan Brand


Warranty On Fan

Fanco – The fan is covered by a 2 year replacement warranty – conditions apply. See for details.


Please be aware that this kit comes with a fan with a 'lead and plug'. For this reason returns for change of mind reasons cannot be accepted.

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