Vent covers, why bother ? (1 Viewer)

[ymfb]

Could someone explain the benefits of fitting vent covers, also any reasons to not fit them.

Thanks

 

[sylvester1954]

Could someone explain the benefits of fitting vent covers, also any reasons to not fit them.

Thanks

Ditto.. I look forward to responses with interest.

 

[Odd job]

We don't use the MO HO in the winter apart from as a car, so don't fit the covers, the more air circulation the better. But if sleeping in it when it's cold we do fit them.

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[Reallyretired]

I fit the vent cover on the oven in the winter but don't bother with the fridge as it still seems to work fine. Unlike the fridge which is sealed the oven vent lets in a draught.
Perhaps in constant sub zero temperatures the fridge vent might help.

 

[DuxDeluxe]

My vent covers sit in the MH garage. Never used them but use the van all year round

 

[Nirvanauk]

The manufacturers recommend them to be fitted when the outside temp is below 8 degrees. So just do it.

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[Theonlysue]

Handy when its windy. Stops blowing the flame out.
I've camped in minus 15 and fridge worked better without covers than with.
Perhaps it's trial and error?

 

[Shrimp]

We put the covers on the other week when it was very cold and after a short time the fan was running, so we took them off again & it’s been fine.

 

[Lenny HB]

Use them all the time when the van is not in use, stops all the crap getting in behind the fridge. When the van is in use I fit them when it's cold but if running on gas I only fit the bottom vent.
I take them off when travelling as the have been known to come off and at over 40 quid a pair I don't want to loose them.

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[Lenny HB]

We don't use the MO HO in the winter apart from as a car, so don't fit the covers, the more air circulation the better. But if sleeping in it when it's cold we do fit them.

Sounds like you have a very dangerous fridge installation, the back of the fridge must be completely sealed from the habitation area for safety. If there are any draughts it needs sorting.

 

[Drexxer]

I always use our's, when washing the van

best not to get any water near the PCB or similar

 

[LesW]

Didn't know such a thing existed...

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[Lenny HB]

I always use our's, when washing the van

Dometic instructions state they must be used when washing the van.

 

[bigtwin]

But if sleeping in it when it's cold we do fit them.

Id be inclined to fix the problem rather than rely on the fridge covers.

Ian

 

[TerryL]

This was covered in a thread a couple of weeks ago, but here is the real reason.

Your fridge has heating elements which are used to heat an evaporator, the cooling of which then cools the refrigerant liquid - sounds stupid but that's the physics of it, we all know evaporation results in cooling. Ordinarily the heating elements are able to provide enough warmth for the works to do it's job but if the outside temperature falls below a certain point insufficient heat is generated thus there is insufficient cooling. This in turn may* result in the temperature sensor inside the fridge demanding more cooling so the heating elements stay on longer - if you're on gas you may notice the gas burner running longer than usual. The point of the covers is to reduce the flow of outside air thus giving the heating elements a chance of doing a proper job and the manufacturers have specified a temperature at which point you should use covers. Incidentally you should never completely blank the vents off.

This also the reason you may be advised to turn the fridge controls down (i.e. less cooling) if you fridge doesn't appear to be working properly - again it sounds daft but it's true when you understand the physics.

*You note I say may. Some installations manage quite well without covers but it's also quite possible you never notice the fact that the heating elements are on longer than usual.

Tried to put it into basic language, but I only managed a "D" in O-level physics - at the third attempt!

As for reducing drafts, yes they're good at that too although that shouldn't be necessary in a properly installed fridge..........................

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[Geo]

I think I did well in my O levels

Moths 0
Engrish 0
Histerry 0
Scyence 0
Woodwok, Nailed that
I was so good they said i didnt have to go back as i was excrement

 

[pappajohn]

The exhaust vent on my RV fridge was roof mounted, which most American RVs are, and on inspection the mesh insect guard had rotted through in places.
Removed the outer rain cover to replace the simple mesh guard and found an active bees nest.
It worth fitting the covers during none use/storage even in summer.

 

[petenshirley]

Beware using the covers as recomended, up to plus 8C, I believe. I followed this instruction, the outside air temp was around plus 4C, and running on gas, anyway after getting a whiff of scorching, I found the top cover and slatted piece underneath warped. I can only assume it was due to heat build up. I now fit the top cover leaving a one slat space at the top. The covers are of the full width type and came with the van.

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[TerryL]

Beware using the covers as recomended, up to plus 8C, I believe. I followed this instruction, the outside air temp was around plus 4C, and running on gas, anyway after getting a whiff of scorching, I found the top cover and slatted piece underneath warped. I can only assume it was due to heat build up. I now fit the top cover leaving a one slat space at the top. The covers are of the full width type and came with the van.

It should never get hot enough to damage the vent cover - I think there might be a diffuser of some sort (there is on my Swift) but I'm no expert. Methinks a proper inspection might be called for. Anybody else ever suffered this fault?

 

[Lenny HB]

Beware using the covers as recomended, up to plus 8C, I believe. I followed this instruction, the outside air temp was around plus 4C, and running on gas, anyway after getting a whiff of scorching, I found the top cover and slatted piece underneath warped. I can only assume it was due to heat build up. I now fit the top cover leaving a one slat space at the top. The covers are of the full width type and came with the van.

On the big fridge/freezers the top vent gets very hot on gas, I just fit the bottom one when running on gas.

 

[DBK]

This was covered in a thread a couple of weeks ago, but here is the real reason.

Your fridge has heating elements which are used to heat an evaporator, the cooling of which then cools the refrigerant liquid - sounds stupid but that's the physics of it, we all know evaporation results in cooling. Ordinarily the heating elements are able to provide enough warmth for the works to do it's job but if the outside temperature falls below a certain point insufficient heat is generated thus there is insufficient cooling. This in turn may* result in the temperature sensor inside the fridge demanding more cooling so the heating elements stay on longer - if you're on gas you may notice the gas burner running longer than usual. The point of the covers is to reduce the flow of outside air thus giving the heating elements a chance of doing a proper job and the manufacturers have specified a temperature at which point you should use covers. Incidentally you should never completely blank the vents off.

This also the reason you may be advised to turn the fridge controls down (i.e. less cooling) if you fridge doesn't appear to be working properly - again it sounds daft but it's true when you understand the physics.

*You note I say may. Some installations manage quite well without covers but it's also quite possible you never notice the fact that the heating elements are on longer than usual.

Tried to put it into basic language, but I only managed a "D" in O-level physics - at the third attempt!

As for reducing drafts, yes they're good at that too although that shouldn't be necessary in a properly installed fridge..........................

This is quite a good description of how these type of 'fridges work.

https://www.arprv.com/how-dometic-norcold-fridge-works.php

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