One hose, or two?
In the past, we and other reviewers have
grouped classes of portable air conditioners by their cooling capacity. More
recent feedback indicates that that's not truly helpful, and we describe why
below. Instead, you should consider whether you want a portable air conditioner
that has one hose to the outside world, or two.
Types of Portable Air Conditioners
Single-Hose Portable Air Conditioner
A single-hose portable air condition exhausts hot air to the outside, but draws air to be cooled from the room itself. However, as experts at TheSweethome.com, YourBestDigs.com and elsewhere point out, this produces a negative pressure that actually draws warm air into the room through doors, around windows, etc., reducing efficiency. On the plus side, single-hose units are typically the least expensive type of portable air conditioner, and tend to be less bulky.
Dual-Hose Portable Air Conditioner
To eliminate the negative pressure effect and improve cooling efficiency, a dual-hose portable air conditioner has, as its name implies, two hoses. One is the same exhaust hose found in single-hose units, the other is an intake hose, which feeds air from the outside directly to the portable air conditioner. Expert testing shows that dual-hose portable air conditioners are more efficient than single-hose models, but they are bulkier and often pricier.
Based on the above, it would appear that
dual-hose units should be a slam-dunk top choice, and indeed, that's the
opinion of some experts. For example, TheSweethome.com says that "research
provided compelling evidence that dual-hose portable ACs are much more
efficient in very hot weather than single-hose models." A dual-hose model
is the top rated choice at ConsumerReports.org, too, though it doesn't fare all
that well in testing.
But things are not quite so cut and
dried. In our own research, we found that among users, single-hose models often
rate as well or better than many dual-hose portable air conditioners. YourBestDigs.com
chimes in to say that "Ultimately, it seems that dual hose units are
slightly better than single hose units in terms of pure cooling power, but it's
not such a significant difference that it's worth overlooking smaller, cheaper,
and better looking models that still have solid cooling capacity."
Why most portable air conditioners get mediocre reviews
In doing the research for this report,
we quickly found that expert reviews of portable air conditioners offer only
half-hearted recommendations, and user reviews aren't much rosier. Here's one
Like window air conditioners and
central air conditioners, the cooling capacity of a portable air conditioner is
measured in British Thermal Units, or BTUs. However, as TheSweethome.com notes,
Department of Energy research found that regardless of their rating, the
real-world cooling capacity of a portable air conditioner is limited. "Even
in just moderately hot weather, around 82 degrees Fahrenheit, most of the
portable ACs that the DOE tested cooled at only about 7,000 Btu—even when
they claimed to cool at 13,000 Btu," the editors say.
That performance shortfall isn't a
result of poor manufacturing or a design flaw with specific units, but a
byproduct of having an air conditioner that's designed to vent hot air to the
outside while sitting entirely in the room it is trying to cool (instead of
being half inside and half outside). There are a bunch of added sources of
inefficiencies, too, TheSweethome.com notes.
Thus, based on the feedback we've seen
from expert reviewers, and users, we are only recommending larger portable air
conditioners in this report, rated at 10,000 BTUs or greater. Smaller portable
air conditioner models are available, but because of their operational
inefficiencies, unless the space you are cooling is exceedingly small, the
chances are exceedingly high that performance will be disappointing.
Unexpectedly poor cooling isn't the
only reason that many consumers are disappointed with the portable air
conditioner they select. One key problem is not understanding some of the
basics of how portable air conditioners work -- including the fact that they
need a way to exhaust air to the outside to work at all. We discuss that in
more detail in our section on the pros and cons of portable air conditioners,
elsewhere in this report.
Finding The Best Portable Air Conditioners
"Portable Air Conditioners"
"The Best Portable Air Conditioner"
"Portable Air Conditioners"
To find the best choices among
portable air conditioners, editors read through available, credible expert
reviews from sources such as ConsumerReports.org, TheSweethome.com and
YourBestDigs.com. We then weighed feedback from users as posted at sites such
as Amazon.com, HomeDepot.com, Walmart.com and others. We considered
performance, how easy the portable air conditioner was to set up and use, and
how well it held up over the long haul, including the warranty and customer
service reputation of the manufacturer. The result is our picks for a portable
The best portable air conditioners
No single-hose portable air
conditioner gets more respect from owners and experts than the LG LP1215GXR (Est. $400).
It's the top choice among all portable air conditioners at YourBestDigs.com,
and has hundreds of user reviews -- mostly positive -- across sites like
Amazon.com and HomeDepot.com.
This LG portable air-conditioner is
rated at 12,000 BTU and to cool a room of up to 400 square feet, but you'll
find the best performance in smaller spaces. Indeed, YourBestDigs.com found
that the LG did the best job of all the portable models available, running even
with a well-regarded Whynter 14,000 BTU dual-hose model (covered below), in
cooling down a 250 square foot office. The testers note that it "not only
cooled the room, but actually left the room cold—something these units
can rarely accomplish."
However, when tasked to cool a 400
foot space, things begin to lag, markedly, and the LG beats, but just barely,
other single-hose units, and lags behind the dual-hose Whynter. "These
cooling levels mean that the only way you will stay cool in extremely hot
temperatures with the air conditioners blowing directly on you, and even then,
it's not comfortable É it's just barely getting you by," the editors say.
The other spot where the LG outpaces
its competition is in noise levels, both when starting and while running. You
won't be reminded of a library while the LP1215GXR is running, YourBestDigs.com
says, but noise levels at least "stayed low enough to not wake us up as
The LG LP1215GXR portable air
conditioner is reasonably well equipped. There's a remote control, 24 hour
timer, a three-speed fan, and four way air direction. The unit can also be set
to oscillate to distribute cooled air throughout the room. An auto-clean
feature can be used to remove moisture from the heat exchanger to prevent the
growth of mildew. Auto-restart will automatically start up the unit after a
power outage. There's a dehumidification-only setting, and the unit can remove
up to 1.2 pints of moisture from the air per hour. This self-evaporative model
includes a drain outlet for continuous draining when used as a dehumidifier.
On the aesthetics front, the LG
LP1215GXR isn't small, but it's more compact than many other portable ACs that
cool this competently. Its footprint is 14.33 inches wide by 32.76 inches high
by 15.5 inches deep, and it weighs just under 62 pounds. Most users find the
grey cabinet to be reasonably attractive -- or at least not downright ugly.
You'll need to find a spot that's in reach of its five foot exhaust hose, and
its six foot power cord.
We found lots of user feedback for the
LG LP1215GXR. No portable AC does particularly well with owners -- common
complaints include inadequate cooling, unacceptable noise levels, and
challenging installation, and the LG is certainly not immune from those.
However, its ratings at user review sites, including a 3.9 star score at
HomeDepot.com based on over 500 reviews, and counting, is pretty good for the
category. Many users -- at least those with reasonable expectations, say that
the LG LP1215GXR cools adequately, or better; is reasonably quiet; and is
reasonably easy to install.
The LG LP1414GXR is
covered by a one-year warranty that looks to be fairly comprehensive and
includes full replacement and in-home service, if necessary. However, one potential worry spot is that LG's customer service doesn't get
much love if things to go wrong with the unit.
We also like the (Est. $480) in this category. It's the highest-rated single-hose portable air
conditioner at ConsumerReports.org, trailing the double-hose units they like
better -- but only by a handful of points. Like all single-hose units, it only
gets a Fair rating for comfort, but it is actually the best rated model for
noise, at least at low speed, scoring the lone Very Good score among the currently
tested portable ACs in this performance category. While not every user agrees,
most do say that the unit is surprisingly quiet, so the Honeywell might be an
especially good choice for a bedroom. Speaking of users, feedback isn't as ample
as for the LG, but it is every bit as good, if not a touch better -- scoring a
4.2 star rating at BestBuy.com, for example, based on around 125 reviews
This 12,000 BTU portable air
conditioner has some positives -- and negatives -- when compared to the LG. It
has the same BTU rating and many of the same features -- including a 24 hour
timer, remote control, auto evaporation, dehumidification only mode and three
speed fan. What's missing, however, is the oscillating and auto clean functions
-- neither of which are likely to be deal killers. The Honeywell HL12CESWB is a
little bulkier and heavier than the LG -- measuring18.9 inches wide by 31.3
inches high by 15.7 inches deep and weighing 72 pounds. Cost is the biggest
negative, however. Its retail price is a bit higher than the LG, and even a
little higher than our Best Reviewed dual-hose model, profiled in the next
section. But if relatively quiet operation is high on your priority list, the
Honeywell is well worth considering.
The Honeywell HL12CESWB comes in
white, with a blue accent panel that gives it a little bit of a nautical look.
However, versions with grey or black accents, or in all white, are also
available. It's covered by a five year parts and labor warranty.
The best dual-hose portable ACs
While single-hose portable air
conditioners are often cheaper and less bulky, experts largely say that for
maximum cooling performance, a dual-hose model is your best bet. There are a
number of reasons for this, but chief among them, as noted at the top of this
page, is that they are less prone to drawing warm air into the room you are
trying to cool down.
Whynter dual-hose portable air
conditioners typically do well among experts and users, and they are often
price competitive with -- and sometimes cheaper than -- better single-hose
models. A case in point is the (Est. $450), which is rated at 14,000
BTU. It's the runner up pick at TheSweethome.com, largely because it is a
little less efficient than the site's top pick, the Whynter Elite ARC-122DS (Est. $480).
We like the ARC-122DS, too, but it simply has less support among experts and
users. Where we found only a handful of user reviews for the ARC-122DS (albeit
ones that were, for the most part, very strong), the ARC-14S has a
well-established track record, with well over 1,000 unique reviews across sites
like Amazon.com, HomeDepot.com, BestBuy.com and elsewhere. While not every
owner is completely pleased, with scores that range from 3.9 stars to 4.1 stars
almost everywhere we looked, and occasionally even a point or two higher,
that's actually pretty good satisfaction for a portable AC with this amount of
In addition, ConsumerReports.org and
YourBestDigs.com have tested a version of this model that includes a heating
function, the (Est. $470). It scores just
behind the top finishers at both sites. User reviews are a bit more limited,
however, and a bit less positive, leading us to suggest that unless, for some
reason, you want a portable unit for both heating and cooling -- though one
that's not really aces at either function -- you stick with the cooling-only
Of course, its dual-hose operation is
why you'll want to select this Whynter portable AC, but there are other pluses,
too. It's a self-evaporative design, so unless you have very humid conditions,
there's no need to drain condensate from the unit. It has a three speed fan and
can work as an AC, dehumidifier (up to 101 pints per day) or just a fan. There's
a 24 hour timer and remote control for convenience.
On the downside, some users say that
the ARC-14S can be loud, so take that into consideration if you want a unit for
your bedroom. Some also say that the intake and outlet houses mount too closely
together on the window kit -- and offer some relatively simple DIY
modifications among their reviews, especially at Amazon.com. It's rated to cool
an area of up to 500 square feet, but as we've discovered in our research,
those types of claims are on the optimistic side. That said, while the version
of this portable AC with a heater function was not exactly gangbusters in
cooling down a 400 square foot room in tests at YourBestDigs.com, it did better
in that large of a space than any other portable AC tested.
In terms of size, the Whynter ARC-14S
is not exactly petit. Housed in black with silver trim, it measures 19 inches wide
by 16 inches deep by 35.5 inches tall. It also weighs 80 pounds, so pushing it
from room to room on its casters can be a bit of a chore, let alone lugging it
up and down stairs. Even though this is a portable unit, placement -- as is the
case with most portable ACs -- is limited; it needs to be within five feet of
the window (or other opening to the outside) and six feet of an electrical
outlet. The ARC-14s is covered by a one year warranty on the entire unit, plus
three years on the compressor, but freight charges back to the maker are the
owner's responsibility after the first two months.
Last year's Best Reviewed dual-hose
portable air conditioner, the 11,600-BTU (Est. $570) remains available and worth considering if you want an
option other than a Whynter model. It performs well enough in testing to take
the top spot in ConsumerReports.org's review, although it still does not earn a
Recommended label (no portable AC units are recommended in that test).
Owner feedback, although somewhat
limited (be careful at Amazon.com as it lumps feedback of this unit with a
different one, with a higher capacity and a heating function, that does not
score as well), is better than we see for most portable air conditioners. Most
say it works very well and is certainly an improvement over having nothing.
In addition to cooling the Friedrich ZoneAir P12B has a fan mode and a
dehumidifier mode that can remove up to 72 pints of moisture per day. There's a
self-evaporative system to handle condensate, with a water tank to capture
excess water and an auto shut off to prevent over flow. Other features include
a remote control, 24 hour timer, washable air filter, and casters so that the
portable air conditioner can be wheeled into another room. At 72 pounds, the P12B
is lighter than the ARC-14s, but still a little heavy to be carrying up and
down the stairs too often -- something that can be said about most
"portable" air conditioners. The Friedrich
covers parts and labor for one year, and five years for the sealed refrigerant