I have a portable Air Conditioning unit and would like to use the chimney as an exhaust, can I just put the extension hose into the chimney and let the hot air rise out like a fire would ?. It would seem better than using a window as that worked but very hard to make it in anyway airtight.
Most aircons generate not just hot air, but hot very wet air, to the point where a lot pf it drips around the place..if the tube goes straight up, chances are it will run back down the tube into the unit.
Of course that depends a lot on the exact unit, which is unspecified.
's not enough data there to tell. Some units evaporate the condensate on the hot condensor (which is then expelled with the hot air) as this reduces the requirement for draining the condensate out, and it makes the condensor more efficient.
It does depend on the type of aircon. If it condenses water out to a tank or a drain the exhaust air will be no wetter than ambient. If however it is the type that evaporates off the condensate then the exhaust will be wet.
Don't forget that its fan driven at a fair speed. It would suck all the remaining cool air up the chimney and remove the effect of the AC pretty quickly unless the hose is sealed to the chimney to stop it drawing the room air up the chimney IMO.
> It has a water tank inside it but i've only just started using it > today. The give away of how to mount the vent house is the "window mounting kit".
A mate of mine had one like this and wanted to operate it on his landing, to cool all the upstairs rooms so a ran a pipe up into loft and along and vented out soffit. The two project killers were 1. Its performance in blowing along such a length of exhaust pipe was crap, basically any more pipe than supplied and it performance is next to useless and 2. condenate collected in the pipe, he found puddles in the horizontal section in the loft and water ran down the vertical section back into the unit, filling it up and leaking onto floor.
Ended up having a proper two part air-con unit professionally installed that worked properly rather than messing around with the "toy" air conditioners that appear so popular nowadays.
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