Carcoon Analysis

[Jellybean]

Purchased a carcoon this year , got a hydrometer, over the last few days I am gathering data 

Reading up, a carcoon is primarily about controlling the dew point ,  my understanding is when the air temp equals the dew point temp , air is 100% saturated , condensation, fog can occur

https://www.carcoon.com.au/how-carcoon-works/

Over the last few days 

The carcoon air temp is 5.7 degrees, 66.9 relative humidity and 0 degree dew point temp , low risk of condensation

Carcoon 

Garage

It was up at 15 degrees in the garage with the sun out and 49% humidity

Garage

 

It got interesting when I seen a big shift in temps , 2 degrees to 14 degrees within 12 hours (allegedly the carcoon has its own controlled climate , compensates for the temperature swings , in theory it should not see a big swing in temps within the bubble , resulting in no condensation)

Unfortunately, it has not done its job, Aluminium parts have condensation on them, Aluminium has different chemistry so I assume different thermal properties to steel but still, defeats the purpose of it , 

Occured at 

Carcoon

Note: steel does not appear to have any condensation 

Conclusion to date 

I am still on the fence , need more data 

It will stop damp rising from the concrete slab , stop rodents 

I read 55 to 60 is the relative humidity required to stop rust , need to research if high relative humidity environment is ok once the air temperature, and dew temperature do not coincide , high humidity but no condensation 

I purchased another hydrometer to put in the garage as a baseline, I can compare the carcoon environment Vs garage , carcoon in theory stabilises it environment, no temperature fluctuations, no condensation, mould ; interesting the difference, if any in data points

It is basically a plastic bag with two pc air fans , I am sceptical 

I cannot find anything online contradictory or factual data to back it up, long term users vehicles have no rust but I have not come across any who stripped a car after use , I am more concerned about unseen areas not directly exposed to the air flow of the fans 

I could put a dehumidifier in there but it's expensive to run and carcoon state you don't need one

Will try some silica cat litter, it may reduce the humidity or maybe nothing outside of a dehumidifier with these big temperature swings

 

 

Edited November 24 by Jellybean
Update pics (see edit history)

[jagman]

Maybe try one of the small dehumidifiers (1 litre , for a bedroom sized room ) circa £35 and 40 watts - ) running 24 /7 around £1.50 a week - you can check to see how much water is collected daily and when during the day /night to use a timer ? The quantity of water per day will now be visible and any changes to the garage ventilation or silica bags etc show both on the hydrometer and in the water jug 

[Jellybean]

47 minutes ago, jagman said:

Maybe try one of the small dehumidifiers (1 litre , for a bedroom sized room ) circa £35 and 40 watts - ) running 24 /7 around £1.50 a week - you can check to see how much water is collected daily and when during the day /night to use a timer ? The quantity of water per day will now be visible and any changes to the garage ventilation or silica bags etc show both on the hydrometer and in the water jug 

I was looking at the dehumidifier,but for low temps you need a Desiccant dehumidifier, continuous drain , they are about 200 and 10p per hour to run , considering the fans pull in air from the unsealed garage ,I assume it would be running 24/7 

Estimate 30 to 40 pound a month to run , expensive 

I was looking at 20mm rubber gym floor tiles ,may help 

Will try 7kg of silica cat litter in the carcoon , see if it helps, cheapest option 

 

[TuneR]

Those pics look like underneath the bonnet in my cars in my steel shed, i've opened the bonnets and stuck on the dehumidifier for longer to try and sort it out. The big temperature swings are the cause alright and it looks set to continue this month. Will be just increasing the dehumidifier running time til i get it right. Strange to see it in a Carcoon, thought they were supposed to prevent this but looks like they cant cope with those swings either.