Solar Sub-floor Ventilation

Solar Sub-floor Ventilators

Remove dampness under floors, permanently.

  • Reliable, Quiet, Fully Automatic
  • Runs every day, costing nothing
  • Very easy to install.

You may have a serious damp problem, even before you can smell it, with corrosion creeping up masonry walls, and floor timbers swelling and rotting.

Sub-floor ventilators will cure crumbling bricks.

Sub-floor ventilators will prevent crumbling of bricks and foundations.

Checklist:

  • Is it damp under the house?
  • Are the foundations damaged?
  • Do floorboards move or squeak from rotting timber?
  • Are you encouraging termites? 
  • Is there an unpleasant smell from the damp under floor?
Sub-floor ventilators will prevent rotting of floor joists.

Sub-floor ventilators will prevent rotting of floor joists.

  • Simple remedy for damp and smelly under floor areas.
  • Permanent solution –  once installed, you have on-going protection.
  • No more smells, rotting timber or flaking paint.  
  • No running cost, and no intrusive noise.
  • No sprays, no poisons.

 

Five common problems prevented:
• Horrible, mouldy smell.
• Rotting floor boards & stumps.
• Damage to internal walls & paintwork.
• Crumbling brickwork and foundations.
• Breeding ground for termites, white ants & borers.

Pass warmer, drier, outside air through damp sub-floor areas, to remove the moisture that causes damage. 

  • Fan operates during daylight hours only, when fresh air is warmer and drier, rapidly reducing moisture under the floor.
  • Dampness under the floor, will be completely removed, so long as any water flow is stopped.
  • Once dried out, the problem is gone forever.
  • Why pay to operate the fan, when the sun can do it for free?

See this video to learn more about these solutions

 

Three Solutions:

1.   Wall-mounted air extractor fans. 

Three sizes and five models:

Just make hole, and push it in from the outside.  No need to access under the floor.  

16w wall mount sub-floor air extractor fan

16w wall mount sub-floor air extractor fan

  • Removes moisture all day, directly out through the wall.    
  • No need to get under the house, just make a hole and insert the fan from the outside.    
  • Three models, all with external grille and insect screen. 
  • Suits any type of wall.
  • The fan box fits into the space of 3 bricks high by 1 brick wide – (235mm x 245mm).   
  • The white grille covers any rough edges, as it is larger (280mm x 290mm) than the hole.
  • The black metal box sits inside the wall cavity, with just the white louvres showing.
  • Solar panel may be installed on any sunny roof or wall.
  • Wire is included, to connect the fan and solar panel.
  • For best effect, install to draw fresh air right across the sub-floor space.
Showing rear of wall mount sub-floor fan

Rear of the sub-floor fan; you could easily add a duct

 Easy to install.

  • Completely safe, 12 volt – no dangerous wiring.
  • Fan box is one brick wide x three bricks high. (235mm x 245mm x 100mm deep)
  • Choice of 3 fans – gentle, medium to high air flow.
  • Runs all sunny days, and will completely dry out the sub-floor area.
  • Kits contain the fan with housing, a matched solar panel with frame, electrical cable, wiring and instructions.
  • Optional flexible duct kits are available  to connect to the fan.
  • Dimensions of the vent cover:  280mm x 290mm.
Showing 200mm sub floor air extractor fan kit

Showing 200mm sub floor air extractor fan kit

200mm sub floor extractor with metal fan

200mm sub floor extractor with metal fan

Large 300mm sub-floor fan

Large 300mm sub-floor fan

Size of white grille:   408mm x 408mm

Large 300mm sub-floor fan back view

Large 300mm sub-floor fan back view

Size of fan duct:  300mm dia x 180mm

Large 300mm sub-floor fan side view

Large 300mm sub-floor fan side view

Size of black box:  360mm x 48mm

150mm 8 watt fan (300 m3/hr), 150mm 16 watt fan (500 m3/hr), or 200mm 10 watt fan (900cmhr)

Products – April 2016
Prices
Sub-floor in-wall extraction kit 0818 without duct – Wall extractor 150mm 8w fan kit with safety vent cover, 18w solar panel with adjustable tilt frame, 10m electric wire & installation instructions. $526
Sub-floor in-wall extraction kit 0818 with duct – Wall extractor 150mm 8w fan kit with safety vent cover, 18w solar panel with adjustable tilt frame, 10m wire, 6m flexible uninsulated duct, duct tape & installation instructions. $601
Sub-floor Ventilation kit 1518 –  150mm 8w fan with safety vent cover, 18w solar panel with adjustable tilt frame, adjustable temperature thermostat, 10m double-insulated electrical cable, 6m uninsulated flexible duct, duct tape & installation instructions. $740
Sub-floor in-wall extraction kit 1635 without duct – 150mm 16w fan kit with safety vent cover, 35w solar panel with adjustable frame, 10m wire & installation instructions. $637
Sub-floor in-wall extraction kit 1635 with duct – Wall extractor 150mm 16w fan kit, 35w solar panel with adjustable frame, 10m wire, safety vent cover, 6m flexible uninsulated duct, duct tape & installation instructions. $712
Sub-floor Ventilation kit 1535 – 150mm 16w fan with a safety vent cover,  35w solar panel with tilt adjustable frame, adjustable temperature thermostat, 10m double-insulated electrical cable, 6m uninsulated flexible duct, duct tape & detailed installation instructions.  $780
Sub-floor in-wall extraction kit 90010 without duct – Wall extractor 200mm 10w fan kit, 10w solar panel with adjustable frame, 10m wire, safety vent cover & installation instructions. $640
Sub-floor in-wall extraction kit 90010 with duct – Wall extractor 200mm 10w fan kit, 10w solar panel with adjustable frame, 10m wire, safety vent cover, 6m flexible uninsulated duct, duct tape & installation instructions. $675

 

  • These fans are built as external extraction fans, discharging air out through the grille.
  • The direction of air flow may be reversed by removing the fan and installing it the other way round.
  • Fans may be purchased drawing from the grille and discharging into a duct for $50 extra.

 

 

 

 

2.   In-line fans.

Use with flexible aluminium or PVC duct, to direct air to or from specific problem areas.

  • Direct air to, or draw air from, specific problem areas under the floor.
  • More effective in clearing up particular bad problem areas.
  • Fit duct, or a piece of PVC pipe, onto the fan, to go towards specific moist places.  
  • Three fan and solar panel options available.
  • Two sizes of 150mm fan are used – the gentle 8w model is quieter than the higher flow rate 16w fan.   They are identical in size.
  • The 200mm fan has metal blades, draws more air, and is quieter than the 150mm fans.
  • Generally, 150mm duct is easier to obtain, and to work with, than 200mm duct.
  • Adaptors are available to reduce the duct size: 200mm – 150mm.
  • Generally, there is more loss on the downstream side of the fan, so it is wise to draw the air, rather than to push it, for maximum effectiveness.
150mm and 200mm in-line DC fans

Relative sizes of the 150mm and 200mm in-line DC fans

  • The most popular size sub-floor ventilation fan we sell is the 150mm in-line fan.
  • Highly adaptable, easy to make your own custom ventilation system to suit your house.
  • Use the 150mm inline fan to direct fresh, warm air to a particular damp place underneath the house, or to extract moist air from any particular area, to the outside.
  • Flexible 150mm aluminium or plastic duct is readily available to direct the air flow, or you can buy standard 150mm PVC pipe, available from local plumbing supplies.

flexible-ducting

  • The 150mm 16 watt brushless DC fan, runs from a 35w or 40w solar panel.
  • Mount the solar panel on a nearby sunny roof, or north-facing wall, and wire it directly back to the fan, preferably via a DC switch or the adjustable thermostat which we recommend.
  • The closer the solar panel faces towards the sun, the better will be the performance of the fan.
  • Fans have metal 150mm flanges already fitted, for easy fitting to the flexible ducting.  Just use cable ties or duct tape to hold it in place.
  • 150mm PVC pipe also fits straight onto the flanges, and can make it easier to reach hard-to-get places, that could otherwise be inaccessible.

elbow

  • Metal elbows, Y-pieces, check valves and boosting fans, are available, to make up your own customised ventilation system.
  • For really wet, damp or cold areas, it may be beneficial to pre-heat the air, using a SAM solar air heating module.
  • Heated, dehumidified air, blown into the damp sub-floor space can dry it out better and faster.

Specification for 150mm Inline fans

 12 volt Inline Fans 8 watt model 16 watt model25 watt model
 Airflow Up to 300 m3/hr Up to 500 m3/hr Up to 1200 m3/hr
 Speed 1600 rpm 2300 rpm 1000 rpm
 Current draw 0.7 amp 1.7 amp
 Noise level 40 dBA 43 dBA 56 dBA

 

The 200mm inline fan has a 10w motor, moves more air than the 150mm fan, and has less air noise, and is almost silent.

For more effective sub-floor ventilation, ducting from the outside fresh air source to the center of the building is advised, so that the moist air is vented out equally on all sides of the house.    Another option is to run the ducting directly to the dampest part of the sub-floor area.

We recommend the ducting be suspended from the floor joists to keep it off the ground,    We include suitable metal strapping with the duct kits, or it can be purchased locally.

 

 Prices – September 2015

Sub-floor Ventilation kit 1635 –  150mm 16w fan, mounting kit, 35w solar panel with tilt adjustable frame, 30m double-insulated electrical cable, safety vent cover, 6m uninsulated flexible duct, 2m strapping, end fitting & detailed installation instructions.$780
Sub-floor Ventilation kit 1640 – 150mm 16w fan, mounting kit, 40w solar panel, thermostat, 30m double-insulated electrical cable, safety vent cover, 6m uninsulated flexible duct, 2m strapping, end fitting & detailed installation instructions. $745
Add SAM Heating module kit – SAM air heater and all mounting fittings, 3m flexi insulated duct, duct tape & detailed instructions.$650
Sub-floor in-line  200mm extraction kit 2010 with duct – In-line 200mm extractor fan kit, 10w solar panel, 30m wire, safety vent cover, 6m 200mm flexible uninsulated duct, 2m strapping, one end fitting & detailed instructions.$780
Sub-floor in-line  200mm extraction fan 2010 with no duct – In-line 200mm extractor fan kit, 10w solar panel, 30m wire,$675
Sub-floor in-wall flanged 200mm extraction kit 2010 no duct – Flanged extractor fan kit, 10w solar panel, 30m wire, safety vent cover & detailed instructions. $650
EXTRA COMPONENTS – Customise your own kit:
Extra inline 16 watt brushless DC fan with flanges – Up to 1200 Cubic Meters per hour$165
Solar panel – 40watt – basic solar panel with leads, no mounting supplied$110
Solar panel direct-on-roof pair of mounting brackets and screws$55
Solar panel – 35watt – solar panel with fully adjustable mounting frame$220
Adjustable Temperature Control Thermostat$88
Additional flexible 150 mm aluminium expandable duct – 6m $80
Plastic insulated flexible 150 mm duct – 6m$130
Extra roll of 2 core sheathed 4mm twin wire, 30 metres $58
Extra flanges, for 150mm duct connection$28
Eave Vent cover, painted galvanised Steel – 450mm x 250mm$28

 

 

3.    Wall mounted or in-line 300mm fans, for large areas. 

  • To move massive amounts of air into, or out from, a sub-floor area, you can use the SV3000 gable fan models, and a much bigger hole in the wall.
  • These fans require a safety cover, for accident protection.
  • The 300mm fans may be ducted from one or both sides.  (Select required model)  

 

Dimensions:  fan diameter 300mm, flange outside diameter 500mm, depth 200mm

 

Silently effective, moves more air than any other, but requires 300mm duct, if using duct.

Solar panel with adjustable mounting frame

Solar panel with adjustable mounting frame

Largest 300mm sub-floor ventilator fan.

Largest 300mm sub-floor Gable ventilator fan.

Unless the air flow volume and direction are carefully considered, it can be worthless using this bigger volume fan, over the smaller ducted fans.

When purchasing the Gable-mount Solar Fan you will probably need to order at least one Gable Vent Cover as a safety cover for the spinning fan, and another to cover up any additional vent hole, to protect from the weather.

The weatherproof safety vent covers are made from moulded plastic to suit the sub-floor Gable fan, and can be painted to match the house.   An additional cover may be used to cover a vent opening at the other end of the house.

Safety cover for the Gable sub-floor ventilation fan

Plastic safety cover for the sub-floor Gable fan

You need to give some thought to the airflow direction – is there a cross-flow situation where fresh air can be drawn in at one side, and the damp air expelled from the other?    Do you need to make any extra openings to assist in cross air flow?

In almost all cases it is best to run the sub-floor ventilation directly from the solar panel, however in rare cases of extreme damp, it could be better to operate the fan via a thermostat, so that only warmed air is pumped in.    This extra control can be gained from fitting an adjustable thermostat, and you can then control the temperature at which the fan starts and stops operating.   Remember that the thermostat measures the air temperature where it is actually located, so don’t install it under the house!

Prices – September 2015
Sub-floor Ventilation Kit 1400G – Includes large fan, mounting kit, 20w solar panel with frame and fittings, thermostat, 30m extra wire, with round safety vent cover & detailed instructions.$780
Sub-floor Ventilation Kit 2100G – Includes large fan, mounting kit, 25w solar panel with frame and fittings, thermostat, 30m extra wire, with round safety vent cover & detailed instructions.$840
Sub-floor Ventilation Kit 3000G – Includes large fan, mounting kit, 30w solar panel with frame and fittings, thermostat, 30m extra wire, with round safety vent cover & detailed instructions.$920
Extra Gable Vent – 560mm diameter$145
Bushfire-rated Galvanised Steel Mesh Vents$25
Adjustable Temperature Control Thermostat$88

 4.   Pre-heating the air.

 

Solar Air Heating Modules for preheating the air.

Solar Air Heating Modules for preheating the air.

To really remove all the moisture quickly and permanently, you can heat up the air first, before it enters the sub-floor.

This means the relative humidity of the incoming air is really low, thus being able to absorb more moisture before it becomes saturated.

Installing a SAM solar heating module can effectively deal with persistent or severe sub-floor damp issues.

It is important to first identify and eliminate any sources of large amounts of moisture inflow, when fitting your sub-floor ventilation system.

This ensures the best chances of a successful result.

Because SAM modules provide dry, heated air, a damp sub floor cavity quickly evaporates the damp much quicker, and better ventilates.

This completely changes the sub-floor, easily solving bad damp problems.

sub floor heating using SAM module

For best effect, mount the SAM unit so the ducting into the sub-floor is short, to minimise heat loss.

The 150mm fan, is used for the SAM, and is ideal for sub-floor ventilation projects because it is simple to install, and requires a smaller wall penetration hole.

Installation Guide is available by clicking here:

If a booster extraction fan is required, just add an additional fan and solar panel to the basic kit.

Install a thermostat if you want the fan to only operate when the outside air temperature exceeds the pre-set limit.    (Remember to place the thermostat where you want the air temperature to be measured).

 

 Prices – September 2015

Add SAM Heating module kit – SAM air heater and all mounting fittings, 3m flexi insulated duct, duct tape & detailed instructions. $650
EXTRA COMPONENTS – Customise your own kit:
Extra inline 16 watt brushless DC fan with flanges – Up to 1200 Cubic Meters per hour$165
Solar panel – 40watt – basic solar panel with leads, no mounting supplied$110
Solar panel direct-on-roof pair of mounting brackets and screws$55
Solar panel – 35watt – solar panel with fully adjustable mounting frame$220
Adjustable Temperature Control Thermostat$88
Additional flexible 150 mm plastic expandable duct – 6m $55
Extra roll of 2 core sheathed 4mm twin wire, 30 metres $58
Extra flanges, for 150mm duct connection$28

 

Free sizing and design assistance – advise sub-floor area (size) and location (suburb):






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