On Wed, 16 Nov 2005 11:38:04 +0000, "mike. buckley"
wrote:

1938 semi, front upstairs bedroom and a rear bathroom both have air
bricks in place which enter the room directly, as a result both have a
healthy airflow. The bathroom has a tacky plastic sliding vent cover and
is due to be sorted as part of an upcoming decoration.

What was the reasoning behind these[1], and is there good reason to keep
them in place? SWMBO is pushing for them to be removed because these are
usually the coolest rooms in the house as a result.


[1] Other than the obvious air flow, why have 2 rooms got them and not
the other two bedrooms?


The reason is to provide some level of ventilation - one front and one
back.

The risk if they are removed, is of condensation and stale air, mould
etc.

Condensation will happen if there are cold enough surfaces such as
uninsulated walls (are they cavity? if so are the cavities filled
with insulation? Are the windows single or double glazed?

For a bathroom, you do need to get rid of the moist air. If the vent
is removed, then an extractor fan is a good idea.

Recent double glazing has trickle vents so that a minimum of
ventilation can be provided.


--

..andy