Budget Sub Floor Ventilation Kits (AC Motors)

Sale price$510.00
In stock

Fan Profile: Normal Profile

System Sizing

The following table outlines useful information, such as quantities of included items and coverage area, for our budget sub floor ventilation kit.

Additional quantities of individual items can be purchased in our store.

Our budget sub floor ventilation kits are designed to be price comparable with other, more basic sub floor ventilation kits available online. Unlike cheaper kits available elsewhere, our budget kits use the same premium components as our premium kits, which are components we install in our business on a daily basis. Our budget kits include fewer items, making them directly comparable to other kits available online.

Our budget sub floor ventilation kits cannot be installed in the same way that we would install our professional sub floor ventilation systems. They do not include enough components or extraction points to achieve the same coverage. They are a simple solution for providing air flow to a sub floor area only. If you would like a kit that replicates our professional installation service, please see our more popular sub floor ventilation kits with AC and EC motors, that also include custom installation maps and one-on-one technical advice.

Sub Floor Ventilation Kits with AC and EC Motors
Kit Size

1 Fan Kit

Suitable for Areas Up to

60 m2

150mm AC Centrifugal Fans (Made in Germany)


Anodised Aluminium Weatherproof Grilles


Back Boxes for Duct Connection to Anodised Aluminium Weatherproof Grilles



150mm Centrifugal Fan

This is the motor. Depending on the way it's faced, it can either pull air out or push air in. It is suspended in your sub floor area by hanging strap so that vibrations can't be transferred through the structure.

150mm V-Flex Duct

This flexible duct is made in Australia and joins all of the components of the system together. It is much stronger than standard flexible duct.

150mm Plastic Louvre Grille

One plastic louvre grille is installed in your external wall. It requires a 160mm round hole to be cut. The grille has a 150mm spigot on the back allowing duct to be connected securely so that there are no leaks. The other plastic louvre grille is installed at the end of the open duct where you are extracting air from. It provides a solid opening to fasten to, so that duct cannot deteriorate over time, or be sucked back in on itself. It also provides a secure point for fastening off to the structure. They are both connected to the fan via ducting.

Digital 7 Day Timer with Battery Backup

The fan plugs into this timer, which is then plugged into a power point. It allows the fan to be switched on and off during daylight hours, typically from 7:00am to 5:00pm. Unlike cheaper timers, it has an automatic battery backup. So if the power is interrupted it automatically resumes once power is restored.

Duct Tape (Left) and Hanging Tape (Right)

Duct tape is used to secure all of the components in the system together. Hanging tape is a polyweave ribbon that is used to tie up and support all of the components in the system.

Fan Specifications


  • Single speed.
  • Approximately 540 m³/h air flow and 48 W power usage.
  • 37 dB(A) breakout sound pressure at 100% speed. Please see our FAQ section below on why decibel ratings are misleading.
  • R2E190 motor manufactured by ebm-papst in Germany.
  • Custom Australian made fan housing.
  • 5 year warranty.
  • IP 44 protection rating.

Normal Profile Dimensions

  • 342mm width (A).
  • 342mm height (A).
  • 336mm length (G).
  • 150mm duct attachment flange diameter (B).

Low Profile Dimensions

  • 340mm width (A).
  • 217mm height (H).
  • 310mm length (G).
  • 150mm duct attachment flange diameter (B).


Negative Pressure, Positive Pressure or Balanced Pressure?

Installing the most suitable sub floor ventilation system in your home can help get rid of air pollutants that can harm your health and your family’s wellbeing. Fresh Ventilation offers efficient solutions that can eradicate stale, moist air in the sub floor area and replace it with cleaner, fresher and drier air. We have three different types of ducted sub floor ventilation systems that you can choose from.

All of our systems are available in any of the three pressure configurations – the components don’t change, the way they are installed determines the configuration.

Depending on how your sub floor ventilation fans are installed, they will either blow air into your sub floor area (positive pressure) or suck air out of your sub floor area (negative pressure). If you have two or more fans installed, it is possible for fans to both blow air in and suck air out of your sub floor area (balanced pressure).

Why Sub Floor Ventilation is Important

Many pest and building inspectors recommend sub floor ventilation to reduce termite risk.  These systems are very effective in homes that experience a continuing musty odour or where there is mould on shoes and clothes in wardrobes or on furniture in living spaces.

Your sub floor area may seem insignificant because it does not form part of your living room. However, the fact of the matter is that this space actually has a high impact on the quality of air you breathe in while you are indoors and may affect your health. Poorly ventilated sub floor areas are often damp. This dampness can result in mould, mildew, musty odours, wood rot and pest infestation in your sub floor area and can also contribute to the spread of mould, mildew and allergies above. 

Sub floor ventilation can remove ground moisture from underneath raised floors, creating a drier and warmer sub floor area.

Types of Sub Floor Ventilation

Fresh Ventilation supplies and installs a range of efficient and technologically superior sub floor ventilation products.  Our systems utilise the latest in ventilation technology, with Australian made components and German made AC or EC motor centrifugal fans by ebm-papst.

Ducted Sub Floor Ventilation Systems

Fresh Ventilation supplies a range of efficient and technologically superior ducted sub floor ventilation products.  Our systems utilise the latest in ventilation technology, with Australian made components and German made AC or EC motor centrifugal fans by ebm-papst. Ducted sub floor ventilation systems have significant advantages:

Duct can be run to problem areas.

The ability to have multiple pickup points means coverage is far greater.

Smart design can achieve excellent cross-flow ventilation.

Stale air can be drawn from deep in the sub floor area.

Premium centrifugal fans are much quieter than most wall-mounted fans and outperform axial wall-mounted fans in a ducted system.

What Makes Fresh Ventilation Different

Fresh Ventilation is a family owned and operated business. Our main business has specialised in the installation of premium quality ventilation systems for over 10 years. Our sub floor ventilation kits use the same premium components we install in our business on a daily basis.

Effective sub floor ventilation requires quality components and proper installation. Given that no two sub floor areas are the same, there is no one-size-fits-all solution to sub floor ventilation. This is why we place a strong emphasis on customised solutions and after-sales support to help you with installing your system.

Our focus is on premium products and expert advice to create ventilation systems that actually work.

All of our kits include:

Installation photos and videos outlining best practices and things to avoid.

Ventilation System Installation

Why Premium Components and Proper Installation Matter

Fresh Ventilation supplies a range of efficient and technologically superior sub floor ventilation products. Our exclusive design is based on years of knowledge, experience and trialling competing products.

Not all components are equal!

System Design

Instead of using a single larger fan, we use smaller fans but more of them.

More fans allow greater coverage, better efficiency and more extraction points.

A single larger fan makes more noise, uses more power and requires longer duct runs to cover the same area as two smaller fans. This is inefficient and leads to uneven duct lengths and subsequently uneven air flow.

Our smaller fans use the same size ducting as our exhaust grilles and we allow one exhaust grille per fan. This allows air to be freely exhausted without a reduction in air flow due to pressure buildup.

Larger fans need reducers to reduce the duct size so that they can be connected to exhaust grilles. This results in a reduction of air flow due to resistance.

When comparing our systems against other systems with the same suggested coverage areas, our kits include more fans, more duct, more extraction points and more exhaust grilles.

Our systems are designed to properly ventilate your sub floor area.

Our kits include the necessary components and advice to do the job properly the first time.


Our 150mm AC motor centrifugal fan has a capacity of 560 m³/h.

The single speed AC motor consumes 52 W.

Our fans make less noise and use less power. Some larger fans use 193 W when operating and have less capacity than two of our smaller fans.

Our fans have a 5 year replacement warranty.


Our digital timer has a battery backup. It won't lose time and start running in the middle of the night.

Our digital timer can be programmed differently on different days of the week. This is ideal when you want different operation on the weekends.


Our duct is manufactured in Australia from two layers of high grade metallised polyester bonded together with fire rated resin encapsulating spring steel wire.

Our duct is not prone to tearing or unravelling like single layer competing products.

Customer Reviews

Based on 89 reviews
Mitch Hurford (NSW)

Great product

Chris Mercer (NSW)

The team at Fresh Ventilation were brilliant in sharing their knowledge and expertise for the design of our HRV system. The manner in which they explained the concepts and rationale for design choices was well articulated and considerate. Highly recommend.

Jack Ho (NSW)
Good service

Good service

Johann Bell (NSW)
Deposit for installation

Really appreciate the considerable time that Fresh Ventilation has spent explaining the benefits of the products they install, evaluating how best to fit them within our house, and their flexibility in identifying a suitable date for the installation.

Alexandre Firmin (NSW)

Deposit for Installation by Fresh Ventilation