Fridge Box Filtered Vents

All too often people underestimate the amount of ventilation reqired.

Mostly a few slots or a little grill does bugger all.

Might be worth thinking about a 12 volt fan...like from a computer ( various sizes available).

There are a variety of off the shelf grill systems available or you may be able to contrive something.

Car air cleaners various shapes and sizes can be pressed into service very nicely.

If you house the 12 volt fan in the air cleaner and have it blowing in....it will preasurise the compartment and air will flow out of every crack and hole.....keeping inside pretty clean....if the campartment is fairly air tight you may have to make some sort of outlet to get good air flow.

All too often ventlation of various compartments is eother completly ignored or piss #@$Y poor.

cheers

I have a fridge box that has a filter at the rear of the box. It is an oiled filter and also has a small fan to help extract hot air from the box, this is powered by a small solar panel.

It does the job very nicely and might give you some ideas.

The fridge box



Here you an see the filter and fan



The filter housing sits on the back of the box



12V Panel to power the fan



The filter is easy to remove and clean.

Even compressor fridges need good ventilation. You need good sized free flowing vents in well positioned locations. Any filters that you place across them will render the vent nearly useless if you are relying upon convection currents for it to operate.

If you wish to have filtered ventilation then you need fairly efficient fans to force the air through the filter. I don't know if anyone has done any tests on the air flow in the box that evaredy posted the pictures of. The size of the solar array in the pictures leads me to the conclusion that the fan would not pump much air. Also it would only supply forced ventilation with full sun on it. When the sun id not on the solar array then the total heat transfer from the sealed unit in the fridge would rely on the heat sink effect of the aluminium case. The filter would effectively block the openings.

Womb@t,

Been thinking of adding extra ventilation to our slide-on camper, and have been thinking of using Honda lawn mower filters to keep the dust at a minimum. They're about 100mm square. However they might be a bit small for a trailer, that's closer to the dust thrown up by the vehicle.

Jaycar sell a good variety of 12v fans., and Whitworths have a number of vents that might help you set something up. Had a look on the Ryco website today for panel (flat)filters, but it's hard to find anything the way the site is set up. Something like a Falcon filter might be the go?

Bob.

Stopped in at the local KK dealer during the week to have a look at there venation systems and decided to get creative today

grabbed a few nylon vents from BCF

Picked up some briggs & straton air filters from the local mower shop

shaped up some aluminium plate I had lying around

fitted off the vents

then the filters were installed

next I'll be installing a small 12 volt computer fan and outlet to the fridge gullwing box to keep air moving around for more efficiency