portable airconditioner
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CraigVmax

Original Poster:

12,248 posts

306 months

Tuesday 12th July 2011
quotequote all
all, interested in thoughts...

Our bedroom is in the eaves of our house and as such gets v warm.

The velux windows if open do help but then of course let light in when sun comes up.

I had a cupboard big enough to fit a portable aircon unit in so fitted one and then cut hole through back of cupboard to vent exhaust into the void behind cupboards (which isnt connected to the room). this exhaust hose will eventually be vented to outside once my mate brings his big drill/core cutter over.

Now, I fitted a grill to the cupboard door and a vent pipe from the aircon blower to this grill. I have also boxed in the aircon unit so the cool air can only escape through the vent.

BUT.. without the cupboard door open it just doesnt cool the room enough. With door open it does cool the room, not to ice cold but to a decent temp. With door open though its not ideal as it cuts off the room.

its a 9000btu unit that covers 235 cubic ft/minute. The room is about 15ft x 12 ft but has a dressing area about the same size linked by corridor which is effectively all one room.

Is it just that the room is too big or have I missed something with where the unit is situated?

illmonkey

19,656 posts

222 months

Tuesday 12th July 2011
quotequote all
Is it cutting off? The sensor will be on the AC unit, and you're locking it in a small hot cupboard.

King Herald

23,501 posts

240 months

Tuesday 12th July 2011
quotequote all
illmonkey said:
Is it cutting off? The sensor will be on the AC unit, and you're locking it in a small hot cupboard.
In which case it would be a small cold cupboard, seeing as it is an air conditioner......;)

If it can't blow air all around the place it'll just cool the cupboard and then click off.

I really think it needs to be able to breathe, as it won't cool by conduction, but needs to be able to circulate air freely around the room.

illmonkey

19,656 posts

222 months

Tuesday 12th July 2011
quotequote all
King Herald said:
illmonkey said:
Is it cutting off? The sensor will be on the AC unit, and you're locking it in a small hot cupboard.
In which case it would be a small cold cupboard, seeing as it is an air conditioner......;)

If it can't blow air all around the place it'll just cool the cupboard and then click off.

I really think it needs to be able to breathe, as it won't cool by conduction, but needs to be able to circulate air freely around the room.
He said he's made a vent from the AC unit to a grill on the door, so all cold air is going directly out. Otherwise, that explains why the room isn't so cold, as the cold is in a sealed cupboard!


CraigVmax

Original Poster:

12,248 posts

306 months

Tuesday 12th July 2011
quotequote all
nope a lot of the cold air is coming out through the vent

JM

3,170 posts

230 months

Tuesday 12th July 2011
quotequote all
CraigVmax said:
Now, I fitted a grill to the cupboard door and a vent pipe from the aircon blower to this grill. I have also boxed in the aircon unit so the cool air can only escape through the vent.

BUT.. without the cupboard door open it just doesnt cool the room enough. With door open it does cool the room, not to ice cold but to a decent temp. With door open though its not ideal as it cuts off the room.
You tell us how the air gets from the air con unit to the room, but how does the air from the room get into the air con unit?

CraigVmax

Original Poster:

12,248 posts

306 months

Tuesday 12th July 2011
quotequote all
good point, I'm not sure where on the aircon unit it sucks in the hot air, I'll have a look, its this one btw..

http://www.pixmania.co.uk/uk/uk/6181455/art/royal-...

JM

3,170 posts

230 months

Tuesday 12th July 2011
quotequote all
CraigVmax said:
good point, I'm not sure where on the aircon unit it sucks in the hot air, I'll have a look,
It'll be where the filter is.

You will need a grill for the unit to draw the air from the room into itself.


CraigVmax

Original Poster:

12,248 posts

306 months

Tuesday 12th July 2011
quotequote all
better get my hacksaw out again!

King Herald

23,501 posts

240 months

Wednesday 13th July 2011
quotequote all
illmonkey said:
King Herald said:
illmonkey said:
Is it cutting off? The sensor will be on the AC unit, and you're locking it in a small hot cupboard.
In which case it would be a small cold cupboard, seeing as it is an air conditioner......;)

If it can't blow air all around the place it'll just cool the cupboard and then click off.

I really think it needs to be able to breathe, as it won't cool by conduction, but needs to be able to circulate air freely around the room.
He said he's made a vent from the AC unit to a grill on the door, so all cold air is going directly out. Otherwise, that explains why the room isn't so cold, as the cold is in a sealed cupboard!
When he said he had put a grill in the door I assumed it was in addition to the cold air outlet, but now I fear it is not, thus cold air can get out, but the warm air in the room cannot get back in to recirculate properly, thus he is cooling the whole world by forcing cooled air out past the door/window/air leaks in the room.


ThatPhilBrettGuy

11,810 posts

264 months

Wednesday 13th July 2011
quotequote all
dibbers006 said:
In my experience, the rating is complete BS...
This unit is really amazing. Specs say it uses 890W but gets 9000btus of cooling out of it.

890W is only about 3000btus....

I wonder what BTU Booster technology is? Evaporate water as well?

Craig, as you're chopping your whole house up, might as well make sure the inlet is a low as possible in the room and outlet as high as it can be.

CraigVmax

Original Poster:

12,248 posts

306 months

Wednesday 13th July 2011
quotequote all
yup thx mate, the outlet is as high as can be but I'll put the inlet low down now. Hopefully it makes some more difference then

ThatPhilBrettGuy

11,810 posts

264 months

Wednesday 13th July 2011
quotequote all
CraigVmax said:
yup thx mate, the outlet is as high as can be but I'll put the inlet low down now. Hopefully it makes some more difference then
Well the cold air pooling around the floor might as well get pumped around. Less chance of the air just popping out of one vent and straight back into the other too! smile

JM

3,170 posts

230 months

Wednesday 13th July 2011
quotequote all
ThatPhilBrettGuy said:
This unit is really amazing. Specs say it uses 890W but gets 9000btus of cooling out of it.

890W is only about 3000btus....
I presume it draws 890 watts when running, and the cooling performance is 9000 btu's or 2.63Kw.


ThatPhilBrettGuy said:
Evaporate water as well?
Yes the condesate water will be "evaporated" in the condenser air outlet, similar principle to most domestic or commercial fridges.




King Herald

23,501 posts

240 months

Wednesday 13th July 2011
quotequote all
JM said:
Yes the condesate water will be "evaporated" in the condenser air outlet, similar principle to most domestic or commercial fridges.
Pity they can't sort that out on other air-con units, to save having that dripping everywhere, or drain pipes running hither and yon.

We'll be using two split units on our new house, but running that drain is going to be a bit of pain, unless we just drip it into space. How about a home made evaporative tray, seeing as the sun shines red hot most days? scratchchin

JM

3,170 posts

230 months

Wednesday 13th July 2011
quotequote all
King Herald said:
JM said:
Yes the condesate water will be "evaporated" in the condenser air outlet, similar principle to most domestic or commercial fridges.
Pity they can't sort that out on other air-con units, to save having that dripping everywhere, or drain pipes running hither and yon.

We'll be using two split units on our new house, but running that drain is going to be a bit of pain, unless we just drip it into space. How about a home made evaporative tray, seeing as the sun shines red hot most days? scratchchin
With splits the 'hot' bit is outside so you need to get the condesate there.

What about using a mini pump and small 1/4 hose?


King Herald

23,501 posts

240 months

Wednesday 13th July 2011
quotequote all
JM said:
King Herald said:
JM said:
Yes the condesate water will be "evaporated" in the condenser air outlet, similar principle to most domestic or commercial fridges.
Pity they can't sort that out on other air-con units, to save having that dripping everywhere, or drain pipes running hither and yon.

We'll be using two split units on our new house, but running that drain is going to be a bit of pain, unless we just drip it into space. How about a home made evaporative tray, seeing as the sun shines red hot most days? scratchchin
With splits the 'hot' bit is outside so you need to get the condesate there.

What about using a mini pump and small 1/4 hose?
The cold bits will each be on (the inside of) an external wall so I will probably just route it through the wall and out into space. The condensers will be up on the roof garden, probably.

CraigVmax

Original Poster:

12,248 posts

306 months

Monday 18th July 2011
quotequote all
so the advice ref venting to the inlet was golden, all working great. i have also fixed a vent pipe to the blower so everything goes into the pipe and out into my room through the vent.

Question though, v occasionally I can feel slight moisture in the air coming out, if any of this runs back down into the unit could it damage it or cause fire?

JM

3,170 posts

230 months

Monday 18th July 2011
quotequote all
CraigVmax said:
so the advice ref venting to the inlet was golden, all working great. i have also fixed a vent pipe to the blower so everything goes into the pipe and out into my room through the vent.

Question though, v occasionally I can feel slight moisture in the air coming out, if any of this runs back down into the unit could it damage it or cause fire?
Glad to hear it's working.

The moisture is coming into the room? There is a drip tray to collect the condesate which will probably drain to a sump where it will be 'vaporised', so if any moisture droplets are condensing/collecting on the tube into the room, they should just run back into the evaporater and down into the drip tray.
But there shouldn't be moisture coming out into the room in the first place, unless maybe the drip try is full and not draining away properly.


CraigVmax

Original Poster:

12,248 posts

306 months

Monday 18th July 2011
quotequote all
well originally, the filters and air intake were butted right up to wall stupidly, it was then that I felt moisture coming into the room from the blower.

I havent felt that since I turned it round and put a vent on the door so the inlet can suck air from the room.

Afaik, on this model moisture is sent out through the exhaust pipe?