Air Exchange

Air X
Subfloor Ventilation

Inadequate sub-floor ventilation will provide excellent conditions of dampness for termite and bacterial growth which can lead to unnecessary destruction of foundations and floorboards. One of the major applications of AirX Fans is that of sub-floor ventilation. Everbreeze Ventilation is able to design a ducted sub-floor system uniquely suited to your house and your needs. Because there is no such thing as "one size suits all" AirX fans come in a range of sizes.

Commonly asked questions about ducted mechanical ventilation systems may be helpful to you when you are making decisions regarding your own home.

What is a ducted mechanical ventilation system?

It is a network of ducts or pipes which have controlled openings through which air is drawn by an electric fan.

Why do I need a ducted system?

Passive ventilation is not always adequately capable of drawing air through the dampest parts of the sub-floor area. Many older homes have walls extending to solid foundations impeding normal air flow. Consequently there are pockets where air will remain stagnant.

By using ductwork that reaches into these isolated places, together with strategically placed wall vents, we force fresh air to travel across paths of our choosing, maximising dilution of contaminated sub-floor air. The contaminated air is then discharged to atmosphere via a grille or discharge pipe.

Why can't I use a simple extract fan?

An extract fan will draw air from an area close to itself only. The make up air may come also from a point nearby, in which case there will be little effect outside of this narrow fresh air corridor.

Is the fan noisy?

We have a fan that is very quiet. It can be further quietened by the use of sound dampening material and acoustic ducting. The fan will have no acoustic impact on people in the house.

How much will the fan cost to run?

Since the fan most commonly used is 75 watts, the running cost is approximately $2.00 per month.

How is the fan operated?

A 24 hour timer will activate the system throughout the day. Initially you may wish to run the fan for a longer time to dry out the area sub-floor. Once conditions have stabilised, you would expect to run the fan intermittently for about 8-10 hours per day.

What maintenance is required?

The fan has a filter mounted inside the casing to protect the fan against the build up of dirt and dust. This filter may be cleaned approximately every 6-12 months or more frequently in a dusty environment.

Installation & Maintenance Guide

The following notes will give you some general information about the AirX fan and provide a guide to installation and maintenance.

General

The fan casing is constructed from galvanised steel and all mechanical and electrical components are manufactured to international quality standards DIN EN ISO 9001. The casing is lined with flamed retardant acoustic material.

The blower assembly incorporates a high efficiency, backward curved centrifugal impeller powered by a single-phase 240V 50Hz motor. Motor is rated to IP44 with insulation to Class B. Motors are equipped with thermal over-load protection. Motor bearings are sealed for life and designed to run at any angle.

The AirX fan is supplied with a mounting bracket designed to simplify installation.
All AirX fans are single speed. If a variable speed function is required please consult your installer.

Safety

Ensure that the fan voltage and circuit details are compatible with the power supply. Wiring must comply with appropriate regulations including requirements laid down by the supply authority.

Mounting the unit

The unit can be mounted in any plane using the bracket secured to any suitable surface using wall plugs or similar. The power cable should be installed via the conduit access hole with the rubber lug that is located adjacent to the terminal block cover panel. Remove the panel to attach the power lead and replace when wiring is complete.

Filter

The AirX fan has a filter, which is a length of filter media attached to a wire frame. The filter is mounted inside the casing to protect the blower assembly from damaging build up of dirt and dust. If the fan is to be used to supply air it will also improve the quality of the air delivered by removing airborne particles such as dust and pollen.

Maintenance

Periodically (more frequently in a dusty environment) the filter will need to be checked.

To access the filter please isolate the fan first is by removing the power cord from the socket. Remove the cover/blower assembly that is attached to the rear of the main unit cover.
Remove the six securing screws and carefully withdraw the cover/blower assembly from the unit casing. (Note that if, after installation, you wish to reverse the airflow e.g. from supply to extract the blower assembly may be removed and replaced after rotating 180 degrees.)
Remove and vacuum the filter but do not wash as this damages the efficiency of the filter media. Replace the filter media if the fibres are separating or breaking down. The filter media supplied with the AirX range is rated to G4 standard.
Remove any dirt and dust with a clean soft brush that may have collected on the blower assembly handling the unit carefully to avoid any damage or distortion.