While fixing a clog in the internal drip pan drain of my
home's AC, I noticed that the drain is not on the very
bottom of the pan. Even when the pan is fully drained
there is about 1/8 inch of water in it, and this water is
(just barely) in contact with the bottom of the cooling
fins. Is there any reason to have water in the pan at
all times, or is this an idiotic design, as I suspect? The
pan is PVC, so I'm thinking of adding a drain to the
bottom of the pan by drilling a hole and gluing a flanged
pvc end to the bottom, if there is no good reason not to.
"Larry Barowski" <MElarrybar-AT-eng_DOT_auburnANOTHERDOTeduEND> wrote in
I like for drain pans to drain completely but many don't. It is usually not
a problem as the slight amount of water that does not drain will evaporate
fairly rapidly if no water is draining into the pan. I would not modify the
I'm no expert, and I don't know if this is universal, but at least some
AC units (like the one I bought) are specifically designed so that the
water that condenses on the inside coils is held in the pan below the
outside fan, which picks it up and flings it onto the outside coils
where the evaporating water increases the cooling efficiency. The drain
is only to make sure the water level doesn't get too high...
Until I read your response, I was exclusively thinking of central air or
split A.C. units. Your response didn't make any sense to me until I
remembered window A.C.'s. Different perspectives. :)
Obviously in the case of a split unit, the condensation pan is designed
to be a long way away from the outside (hot) coils so such a design
optimization is unlikely.
Though it can work well when the evap and condenser are close enough!
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I can feel a big change in AC temp when rain hits the coils,
even when there is no outside temperature drop (here in SW
Florida, it often rains with no temperature drop). I wonder
what the difference in efficiency would be? Since my drip
drain comes out near the outside unit, I'm tempted to try to
rig something up.
Condensate removal is important and to prevent mold or algae build up is
also important. But so are mechanical limitations. If it's a small package
window air conditioning unit we're talking about, then all the postings are
correct. The condensate is removed from the living area's and drained back
to the condenser to aid in efficiency [evaporative condenser cooling.]
Perhaps you could check and see how level the unit is? Generally most are
installed with a 1/4 bubble lean [from level] to the back so the condensate
drains easily. That way, when the unit is idle, the evaporator is not
exposed to excessive water storage.
"sylvan butler" <ZsdbUse1+noZs snipped-for-privacy@Zbigfoot.Zcom.invalid> wrote in message
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