Question:
I have a mobile air conditioning unit with a 2m hose and need to vent it over a
greater distance than the standard length. I would like to vent it via an old
chimney stack but it doesn't seem to allow the hot air to escape. This results
in the air con unit shutting off as it over heats.
My question is therefore, what is the correct method to vent it via the
chimney?
Answer:
If the heated air collected by the A/c unit is extracted via a 2mtr
hose within the air-conditioned space, you will be extracting air from
your conditioned area, and the same amount of fresh air will have to be
delivered from somewhere. If all doors and windows are closed you would
tend to draw a slight vacuum on the area which would cause your
extracted air to return down the chimney to replace that which has been
extracted, and by so doing the area would be heated instead of cooled,
causing your overload condition.
The air required to transfer heat needs to come from an outside source
and vented again to an outside source.
