Self Evaporating Portable Air Conditioner: No More Mess!

Are you tired of mopping up spilled water or emptying your cooling unit's full water trays? Fully self evaporating portable air conditioners don't suffer with this problem and if you don't want any more damp patches on carpets or dangerous wet floor patches, getting one will be the best investment you ever made!

These intelligent air coolers do away with the need for a condensed moisture catching tray by making sure all the excess moisture is pumped out of the building through the unit's exhaust vent hose. How does it do this?

How a Self Evaporating AC Works

portable air conditioner water trayThe process is not very complicated and unless you're a HVAC engineering student eager to know all the technical details, I'm sure my simplified explanation will suffice to satisfy your curiosity. Let's first look at how a regular (non-evaporating) AC unit produces excess water.

Room temperature air is drawn into the unit and forced through a kind of radiator lattice of pipes filled with a cooled refrigerant gas. As the air is chilled, its moisture content is condensed on the cold pipes, dripping down to be collected in the tray at the base of the unit.

You empty it before it overflows, usually signalled by the machine stopping (but not always). If you forget to empty the tray, excess water may overflow onto the floor. What often happens (it used to happen to me all the time) is the water gets spilled when the tray is removed from the unit by clumsy hands!

Enter the solution to my clumsy hands: The self evaporating unit.

Instead of allowing the condensed water to drip down into a tray, the moisture is re-evaporated and passed out of the unit via the exhaust hose. Some units go one step further and reuse the moisture to increase the efficiency of the cooling process before exhausting it out the vent.

Single or Dual Hose?

Most portable self-evaporating AC units employ a dual hose setup for better efficiency and reduced energy consumption. The second hose is used to draw outside air into the unit as well as room temperature air from the room (drawn in through a third inlet vent through the unit's casing).

The air from outside is used to assist with the cooling process and reduce the effect of negative pressure inside the room which happens when the unit draws air in from the room. If the pressure inside the room is lower than it is outside, hot from outside gets sucked into the room through any openings, cracks or badly fitting window glass, making the AC work harder to cool the air inside.

That means a dual hose unit will work more efficiently than a single-hose unit, especially in larger spaces. While the purchase cost of dual hose models tends to be higher than that of single-hose models, that cost is offset by savings in energy usage over time.

Do You Want One?

If you want to buy a portable self evaporating air conditioning unit, perhaps to replace an aging portable model, you can order them easily online from stores like Amazon. For your convenience, I have included a short review of a featured top model that may interest you below:

Note: As an Amazon Associate I earn from qualifying purchases.

Avallon APAC140HC Portable Air Conditioner and Heater

This is a dual AC and heater unit with built-in dehumidifier and fan that packs a real punch in terms of power. It is rated to cool or heat a room up to 525 sq ft and comes with a remote control.

The selling point for this unit is its patented "Invisimist" feature that eliminates the need to drain any water. That's because all condensed moisture from the atmosphere is re-used to pre-chill the cooling system, then it is exhausted via the flexible exhaust hoses for trouble-free operation and no need to empty any drip tray or reservoir (as on older units).

This makes it much more economical to run, saving energy and saving you money off your electricity bill!

The unit has dual hoses for even better economy plus more efficient cooling and unwanted hot air exhausting via the included window fixing kit.

It runs in intelligent mode, adjusting the fan speed and internal settings to ensure the room is kept at the temperature you set it (yes, this is yet another economy feature!).Amazon Disclaimer: The author of this website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to

So you don't have the energy wasting problem that some other AC models cause, of the room you're in getting too cold!

If you need an extra boost of heat during winter, this unit can provide it whenever it's needed!

This model represents a very good investment in portable cooling (and heating) that will last for many trouble-free years of service.

Go ahead and click the image of the unit above to visit Amazon and get all the details plus the current price.

Where to Put a Re-Evaporative AC?

In the event that you have definitely decided to obtain a free standing AC that re-evaporates moisture internally for your home or work place, there is next the dilemma of where to put it once it has been delivered and you've removed all the packaging. There are a few options but remember that no matter where you may want to place it, the unit needs to be close by a window or external vent of some description that will accept its single or dual exhaust hoses.

For most homes or habitable buildings, that means choosing an external wall to allow access to the outside for the exhaust air to be expelled through the venting system. This is usually not a problem as most rooms I've ever come across tend to have the wall with the window kept relatively free of furniture to allow access to the window itself for opening/closing and adjusting curtains or blinds.

That means there will almost certainly be sufficient free space to place a relatively small cooling unit close to the window where a fixing kit can be installed to accept the vent hose or hoses, or a custom vent can be installed through the wall itself. Once this minor requirement has been realized, the problem of choosing a location for the AC unit will be easily solved!