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Evaporative Cooling


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#1 My4Sunshines

Posted 29 November 2012 - 02:12 PM

We have it, and most summers it's been fine though last summer, and looks like this summer too, it just seems to make the house humid or more humid than what it was.

I know it won't make the house 'cold' just cooler, which is fine but I can't stand the humidity. I put it on not long ago then turned it off a short time later as the humidity jumped, it is a VERY hot day today so I realise it will struggle, though we did buy a bigger unit than we needed.

Is this normal for evap or does it need checking?
It's 10 years old and we had it serviced perhaps the end of 2010??

#2 Rachaelxxx

Posted 29 November 2012 - 02:15 PM

Our Evap Cooling is horrible in the humidity, in fact everything just becomes wet and sticky, but it's great with the hot northerly breezes.  I'm in Melbourne and my evap isn't working that great today.

#3 My4Sunshines

Posted 29 November 2012 - 02:17 PM

I'm in Melb too, think I'll leave it off till this evening if I can hold out that long

Drip drip tongue.gif

#4 Feral_Pooks

Posted 29 November 2012 - 02:20 PM

I'm in melb too. We recently moved into a new place with the Evap central air, I've never had it before. I didn't know about the wet thing. So I went for a massive dive, slipping on the wet tiles, and have hurt my sizable ass.

Damn heat.

#5 travelmum

Posted 29 November 2012 - 02:22 PM

I am in Melbourne too and thought that there was something wrong with our unit as all the tiled floors were wet

#6 clm1982

Posted 29 November 2012 - 02:23 PM

Evaporative cooling sucks in really hot and humid weather. It only generally takes the temperature down from 4-10 degrees from what it is outside.

Which is the reason i went with refridgerated air-con yes it costs alot of money to run but id much rather be cool than sit in 45 degree heat  huh.gif

#7 Eeyolet

Posted 29 November 2012 - 02:25 PM

Do you have a window open in every room so the moist air can exit the house?

#8 Feral_Pooks

Posted 29 November 2012 - 02:26 PM

Oh are you meant to do that?

My bruised ass wish it knew that a few hours ago! Lol

#9 My4Sunshines

Posted 29 November 2012 - 02:29 PM

QUOTE (Eeyolet @ 29/11/2012, 03:25 PM) <{POST_SNAPBACK}>
Do you have a window open in every room so the moist air can exit the house?

Yes in most rooms where there isn't a hot breeze coming through, so the majority are open

#10 Eeyolet

Posted 29 November 2012 - 02:30 PM

QUOTE (Pooks_ @ 29/11/2012, 03:26 PM) <{POST_SNAPBACK}>
Oh are you meant to do that?

My bruised ass wish it knew that a few hours ago! Lol


Yeah we grew up with evap cooling and my Mum always drilled it in to us that you need the windows open, even just 15cm. Whenever we forget in one of the rooms (usually DDs bedroom) the room gets so moist, otherwise we don't have any problems. If it is a really humid day it is a bit worse but on a day like today  (in Melbourne) it works prefectly.

Edited by Eeyolet, 29 November 2012 - 02:31 PM.


#11 Missy Shelby

Posted 29 November 2012 - 02:33 PM

QUOTE (Pooks_ @ 29/11/2012, 03:26 PM) <{POST_SNAPBACK}>
Oh are you meant to do that?

My bruised ass wish it knew that a few hours ago! Lol

Damn Pooks, that is Evap cooling 101!! tongue.gif

We have evap cooling as well and it seems just so weird to me to have windows open on a day like this.  I get the theory behind it, it just doesn't seem right!

#12 Walkers

Posted 29 November 2012 - 02:36 PM

It is so bad today! It's not worth having on.
My little boy fell flat on his back this afternoon so the anti-slip socks went on. Wearing socks in this weather defeats the purpose of having cooling!
I also found out the hard way that our toilet seat is wet and slippery  wacko.gif
Very hazardous with timber stairs as well.



#13 My4Sunshines

Posted 29 November 2012 - 03:02 PM

Since I turned it off the humidity has gone from 78 down to 72% however the temp is now 30 inside, blergh!
The sun is on our west side now too so it's going to get worse sad.gif

#14 BadCat

Posted 29 November 2012 - 03:13 PM

Since evaporative cooling works by running air over wet pads to cool it, it doesn't work well in humid conditions because the air is already carrying a heavy moisture load.

If you have your windows open though, it shouldn't get wet on your floors and stuff.

Our unit typically keeps our house at around to 12 degrees cooler than the air outside.  On a humid day it struggles to keep it 8 - 10 degrees lower.

On the bright side, I never feel like I'm living in the fridge, which is how I feel whenever I visit MIL with her air con.

Edited by BadCat, 29 November 2012 - 03:14 PM.


#15 Phoenix Blue

Posted 29 November 2012 - 07:58 PM

Urg. We have evap cooling and I hate it. Today has been horrible. So sweaty and wet inside. Give me refridge any day.

Our house is only just feeling bearable now at 9pm!

#16 Soontobegran

Posted 29 November 2012 - 09:24 PM

We had our evap on today and it was 23 degrees inside as opposed to 40 outside. It was almost 100% humidity today and they do not work as well in conditions such as these but as PP have said the trick is leaving windows ajar just a little.
It doesn't let hot air in because the pressure from the system pushes the air out but it stops the moisture forming.

I love my evap...even though today it wasn't working at it's best, I hate being frozen as in refrig and I hated paying those bills ohmy.gif



#17 Soontobegran

Posted 29 November 2012 - 09:29 PM

QUOTE (My4Sunshines @ 29/11/2012, 04:02 PM) <{POST_SNAPBACK}>
Since I turned it off the humidity has gone from 78 down to 72% however the temp is now 30 inside, blergh!
The sun is on our west side now too so it's going to get worse sad.gif



Maybe your unit needs another service OP. sad.gif  Ours is a bit newer than yours but was pretty good today.




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