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Nety
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  #348736 7-Jul-2010 13:40
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AndrewTD: [snip] I'd be interested to hear from others whether aircon units (heatpumps) really do fix condensation issues.


It depends on what else you are putting into the air ie. steam from cooking, showers etc but certainly air conditioners are a dry source of heat however people tend to think because supposedly you can set a aircon to dehumidify it will always dehumidify.
That is not the case. It will only dehumidifiy when set to dehumidify or when set to cold and even then only when it is hot enough as it affectivly is just cooling. Obviously this is no good in winter which is when you need dehumidifying.
We have aircon for heating but we still run a dehumidifier over winter. 







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Jaxson
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  #348955 8-Jul-2010 08:49
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Hey had another thought that should be considered, given there are about 3 threads on this topical winter problem at the mo.

Condensation/mould/damp etc is all in reference to excessive water build up.  As well as the obvious breathing, shower, unflued gas heaters, kitchen boiling sources, you may have to take a wider look at the house, it's construction, maintenance state and physicall building location relative to the surrounding land profile.

ie.
Do you live in a leaky home?
Is your roof/window and door surrounds, outside cladding etc in good condition with no leaks.
Are any roof penetrations or gutters (especially internal gutters, flat roofs, houses with balcony's etc) all properly sealed and gutters not full of leaves, rusting, leaking around nail/screw points etc?
Do you live in a gully, when it rains does water run under the house?
Is your stormwater drain outlet clear from debris etc.
Is you house built up against the side of the hill, with dirt actually touching some walls etc.  (Common in wellington in lower building rooms etc)
If the house sits up on piles:
Is the ground under your house dry, not wet or damp.
If it is wet in places, where is it coming from, leaky pipes, running in from outside etc?
Is the underside of the flooring dry and not mouldy.
Is there sufficient ventilation underneath the house

All of the above can contribute to an overly wet house, and if not addressed will mean any attempts to remove moisture are just band aids over the real problem.

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