Ken,
It isn't as simple as "fabricating a shroud" for either end of a window
A/C unit. On the Condenser side (the part that is "outside", the air is
usually drawn in through the louvers on the sides of the box and pushed
out the rear. You have to allow that air to be drawn IN besides allowing
for the exhaust.
On the Evaporator side (the part that's "inside"), the air is drawn from
the living space through a large opening and pushed across the
evaporator coils and back into the room. A simple duct will allow
"short-circuiting" of the air flow and you aren't going to get much
cooling.
Restricting the airflow across the condenser is especially bad because
it'll raise the head pressure on the compressor and cause it to fry.
That's in addition to using a lot more power than it should.
This is a good time for a reminder: there was at least one person on
this list last year who was told by an expert that his rooftop A/C was
junk and needed to be replaced. Once he consulted with us and was
advised to clean the condenser coils, he checked and found it totally
plugged with dirt. Cleaning it restored normal operation.
The same advice holds for your home A/C units, either window or central
air type. Check those condenser coils; you'll have to pull the guts out
of the sheetmetal box to do so on a window unit. I've seen more than one
A/C unit that wasn't working at all whose only problem was a plugged
condenser.
<<Jim>>
"Kenneth E. Johansen" wrote:
>
> Ray
>
> What size A/C did you use... and how did you exhaust.. I've read other
> posts where this was done and it sounds like you fabricate a shroud to the
> back of the A/C which connects to a 4?6?8?? inch tube?. Seems to me like
> it would be difficult to exhaust all the hot air out.
>
> Also, how do you get the cool air to circulate in the trailer... if its on
> the floor (I assume facing the center of the trailer).
>
> Thanks for your help
>
> Ken Johansen
> 59 Traveler
>
> At 06:50 AM 5/8/01 -0700, you wrote:
> >Ken - went thru the same thing when putting a/c in my 55 safari (ended
> >up putting it on the floor under a dinette seat with an exhaust duct
> >thru the floor) - your idea of running a duct into the trailer will
> >probably work IF the unit has a large enough BTU rating - the window
> >type units i looked at pulled cooled air back into the front of the
> >unit thru a grid and filter on the front of the a/c (it recirculated
> >the cooled air) - with a unit completely outside the trailer pulling
> >ambient air back into the unit i think cooling capacity would be
> >reduced - with 100 + temps i think it would take one helluva a/c unit
> >to make you comfortable - but sitting the thing outside would solve any
> >interior noise and condensate drainage problems and eliminate the need
> >chop holes in your "baby" Good Luck - Ray Plumlee
> >
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