I have a Mitsubishi MJ-E16PX Dehumidifier with which I am well
pleased. I am using it in my bedroom at the moment and it seems to be
extracting, what I think is, a lot of water. On average it is
collecting 8 litres per 24 hours (the dehumidifier is on from 7am to
10pm). The humidity on the dehumidifier ranges from 60% - 75%.

The room is pretty large 16 feet x 16 feet x 14 feet high. The
building is an old victorian with stone walls. The bedroom has two
addults and one baby sleeping in it overnight.

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

Thanks,
J

(John Flynn) wrote in message . com...
I have a Mitsubishi MJ-E16PX Dehumidifier with which I am well
pleased. I am using it in my bedroom at the moment and it seems to be
extracting, what I think is, a lot of water. On average it is
collecting 8 litres per 24 hours (the dehumidifier is on from 7am to
10pm). The humidity on the dehumidifier ranges from 60% - 75%.

The room is pretty large 16 feet x 16 feet x 14 feet high. The
building is an old victorian with stone walls. The bedroom has two
addults and one baby sleeping in it overnight.

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

Thanks,
J

I had this problem in my bedroom. It only started after I had new
sash windows built so they sealed properly. I don't like
dehumnidyfiers (too lazy to empty them). The other option is to get a
fan installed to the outside. Baxi make a heat exchange fan
specifically for this purpose (and the sound is barley noticeable in a
bedroom) that is designed to be left on all day. As the hot air
leaves the room, the heat is trapped in the exchanger, which in turn
heats cold air as it is brought in from outside. The fan has changed
my windows from dirpping with condensation every day, to dry .... the
company which installed the fan for me was Protim Services.

In article ,
(John Flynn) writes:
I have a Mitsubishi MJ-E16PX Dehumidifier with which I am well
pleased. I am using it in my bedroom at the moment and it seems to be
extracting, what I think is, a lot of water. On average it is
collecting 8 litres per 24 hours (the dehumidifier is on from 7am to
10pm). The humidity on the dehumidifier ranges from 60% - 75%.

The room is pretty large 16 feet x 16 feet x 14 feet high. The
building is an old victorian with stone walls. The bedroom has two
addults and one baby sleeping in it overnight.

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

Firstly, why do you think you have any problem with humidity?
(What symptoms are you seeing?)

Secondly, drying out a room in a Victorian building (or even many
modern buildings) in this way is going to damage the building.
Timber (like floorboards) is going to curl up or warp, laths are
going to shrink away from the plaster weakening ceilings, etc.
I ran one for about 6 weeks, until I realised it was curling up
the floor, which took over a year to recover.

Dehumidifiers (even small ones) need to be used with care,
particulaly in old buildings. They are far too effective in the
room they're in, and useless elsewhere. Opening windows and
ventilating naturally is much better, and if you have a damp problem,
fix that.

--
Andrew Gabriel

In article ,
John Flynn wrote:
I have a Mitsubishi MJ-E16PX Dehumidifier with which I am well
pleased. I am using it in my bedroom at the moment and it seems to be
extracting, what I think is, a lot of water. On average it is
collecting 8 litres per 24 hours (the dehumidifier is on from 7am to
10pm). The humidity on the dehumidifier ranges from 60% - 75%.

The room is pretty large 16 feet x 16 feet x 14 feet high. The
building is an old victorian with stone walls. The bedroom has two
addults and one baby sleeping in it overnight.

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

I'm amazed you have a condensation problem at this time of the year -
especially in an older property. If it has normal ventilation, I'd be
rather worried.

--
*All those who believe in psychokinesis, raise my hand *

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message ...
In article ,
John Flynn wrote:
I have a Mitsubishi MJ-E16PX Dehumidifier with which I am well
pleased. I am using it in my bedroom at the moment and it seems to be
extracting, what I think is, a lot of water. On average it is
collecting 8 litres per 24 hours (the dehumidifier is on from 7am to
10pm). The humidity on the dehumidifier ranges from 60% - 75%.

The room is pretty large 16 feet x 16 feet x 14 feet high. The
building is an old victorian with stone walls. The bedroom has two
addults and one baby sleeping in it overnight.

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

I'm amazed you have a condensation problem at this time of the year -
especially in an older property. If it has normal ventilation, I'd be
rather worried.

The only reason that I think I have a problem is that the dehumidifier
read 75% - which I think is quite high. I may be wrong in this
assumption.

The fact that 8 litres of water is being extracted also leads me to
think there is a problem. Should I expect this amount of water in a
normal house?

The reason that I bought the dehumidifier was there is a general
dampness problem in the house. So wanted to make sure that the
humidity was lowered. I had tried opening windows to reduce the
problem but this did not help.

Regards,
J

On 16 Jul 2004 05:13:58 -0700, John Flynn wrote:

The fact that 8 litres of water is being extracted also leads me to
think there is a problem. Should I expect this amount of water in a
normal house?

Two adults and a baby will produce an appreciable amount of water
vapour purely from respiration (breathing), more if they are rather
too warm and thus perspiring as well. I'm not sure of the exact
figures but a pint/hr for an adult would not surprise me (google?). So
to pull figures from nowhere inparticular half of that 8l could well
from the occupants.

Where is the bathroom? Ours has no ventilation and condensation on the
windows of the bedroom along a short corridor is a problem. Even at
this time of year there will be signs on the windows after anyone has
a bath, though not streaming like they do in the winter.

The reason that I bought the dehumidifier was there is a general
dampness problem in the house.

Real or percieved? Has the house central heating, ours does and sits
at around 30% or lower in the winter but rises in the summer when the
heating doesn't kick in, currently 60%. So 75% for an occupied house
without CH is not out of order for this time of year.

A dehumidifier isn't really the answer, you need to cure the sources
of moisture, ventilation in bathrooms and kitchens, pervention of
penetrating or (rarely) rising damp.

--
Cheers
Dave. pam is missing e-mail

(John Flynn) wrote in message . com...
"Dave Plowman (News)" wrote in message ...
In article ,
John Flynn wrote:

Is 8 litres per day to be expected ? Or do I have a problem - possible
water ingres? If so how can go about finding the problem?

I'm amazed you have a condensation problem at this time of the year -
especially in an older property. If it has normal ventilation, I'd be
rather worried.

The only reason that I think I have a problem is that the dehumidifier
read 75% - which I think is quite high. I may be wrong in this
assumption.

The fact that 8 litres of water is being extracted also leads me to
think there is a problem. Should I expect this amount of water in a
normal house?

The reason that I bought the dehumidifier was there is a general
dampness problem in the house. So wanted to make sure that the
humidity was lowered. I had tried opening windows to reduce the
problem but this did not help.

Regards,
J

well all those indications point to something being wrong I guess.
Just dont reduce the RH too much.

Regards, NT