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Kogan 3.5kw Reverse Cycle Portable Air Conditioner $319 Delivered

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Kogan 3.5kw Reverse Cycle Portable Air Conditioner $319 Delivered
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monty.melb on 03/03/2016 - 14:07 kogan.com (321 clicks)
Last edited 03/03/2016 - 14:34 by 1 other user

Highlights:
3.5kW cooling power – perfect for living areas up to 25 square meters
Cooling, heating, dehumidifying and 3-speed fan function
Smart function – automatic cooling or heating based on your set temperature
Auto Swing function directs airflow wherever it’s needed
24 hour timer
Quiet Operation suitable for bedrooms
Remote control – batteries included
Intelligent self-evaporative water system – rarely need to empty water
Window exhaust connection kit
4 wheels for easy portability

Electrical & Electronics Air Conditioner Kogan

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  • mmd on 03/03/2016 - 14:09
    +1

    Should be a cheaper (on clearance) considering it is Autumn now.

    • StewBalls on 03/03/2016 - 15:16
      +2

      Reverse Cycle

  • Ninjabredman on 03/03/2016 - 14:18

    is this the type of AC that has a large exhaust at the back to expel hot air?

    • battler on 03/03/2016 - 14:19

      yes

      • uminan on 03/03/2016 - 14:29
        +1

        What do you do with the hot air exhaust, do you usually connect it to a pipe that leads outside of the house? Would it not make it much less "portable"?

        • Ninjabredman on 03/03/2016 - 14:36

          @battler:

          that's exactly what I do not want lol, my windows are flynetted and my doors are metal iron, dont want hot air expelled against those meshes from inside the property over extended periods of time

          darn…

        • battler on 03/03/2016 - 14:38
          +1

          maybe flynet could be removed? are they not just held on with a few stays?

        • random110 on 03/03/2016 - 14:59
          +3

          @Ninjabredman: I used one in my son's room for 2 years up against flyscreen and never noticed any negative effects.

        • shmahoo on 03/03/2016 - 15:18
          +2

          @Ninjabredman: unless your fly mesh is rustable metal this shouldn't really be a problem, and consist you're not going to be using this for every day of the year.

        • llama on 03/03/2016 - 19:01

          @Ninjabredman

          that's exactly what I do not want lol, my windows are flynetted and my doors are metal iron

          No wonder it's so hot in there… you need to open a window, and get some AIR in there LOL

          While we renovated we've used these portable units in most rooms of the house. They work fine with the insert fitted into a sliding window and then the hot air blowing at the inside of the flyscreen. There is a gap between the glass and the flyscreen anyway, so the A/C just spreads the hot air over a large area of screen. But even if the A/C vent was jammed right against the flyscreen, it's not like a bit of warm air is going to hurt anything.

          The flyscreen is neither here or there. The biggest problem with these units is the way that they operate, so they never really work properly to cool the room down.

        • uminan on 05/03/2016 - 22:22
          +1

          @battler:
          Thanks!

  • marantz on 03/03/2016 - 16:24
    +1

    Continuous Drainage
    Continuous drainage ensures that you won’t have to continually drain built up water – simply attach a water drainage hose (not included) to the back of the unit so water can drain outside through a door or window.

    So do you need the exhaust and drainage hose to come out the window?

    • llama on 03/03/2016 - 18:27
      +1

      So do you need the exhaust and drainage hose to come out the window?

      The hot air is pumped outside, via the big duct, usually through the window. That is how it gets the heat out of the room (and these type fail badly doing that). Whilst the heat gets removed, the moisture that was in the warm air cannot remain in the cool air that gets created, so it condenses and drips down inside the unit.

      The water drain on this one must go into a removable "bucket" inside the unit, and must be removed and tipped out each day. In humid days in Sydney our similar unit couldn't go the whole night without filling up the water bucket, and switching itself off.

      This Kogan also allows a drain pipe to be fitted so that the bucket never fills up. However water only flows downhill, so you cannot have the drain hose going UP to the window opening.

      Many (better quality?) portable A/C will collect then drip the condensed water down over the motor or the evaporator coil, where it gets evaporated again by the heat and then pumped out the window duct. This Kogan obviously doesn't have that.

      • edrift on 04/03/2016 - 17:00

        the kogan portable reverse cycle aircon i bought years ago (similar to this one) did not need draining when using the aircon. It simply evaporated it back into the air.

        However when using the heating, for some reason you had to drain the water out after every few hours of usage… that was super annoying. You couldn't practically connect a hose to it to continuously drain out unless you had a hole in your floor (since the pipe is at the very bottom and obviously water follows gravity).

  • llama on 03/03/2016 - 19:17
    +2

    3.5kW cooling power – perfect for living areas up to 25 square meters

    Perfect providing it's not hot, and you don't want the 25 square meters to actually be cooled or anything.

    This kind of A/C is incredibly poor at cooling down a room. They do work fantastically well as a "spot cooler" (a refrigerated fan), but no way that they can cool a whole room.

    That is for a number of reasons. Firstly, the motor and compressor is INSIDE the room, and that causes quite a few hundred watts of heat to get added in there and must be removed.

    Then there is the fact that the duct to the window gets as hot as hell, and that re-radiates heat back in the room again.

    But the big problem is that they must pump absolutely massive amounts of air out the window. They have to get rid of their own inherent heat, and also any heat that is removed from the air in the room. So there is a huge volume of air continually blowing out the vent and out the window.

    Guess where that air comes from? It comes from near the floor in the room that is being cooled. So, the A/C picks up the coolest air in the room (which it has just created), sucks it inside itself, heats it up to about 70 degrees, then blows it out the window to the outside.

    So, all the nice cool air (3.5kW worth of it) is continuously grabbed and chucked out the window vent. Then, that expelled air must be replaced from somewhere, so it comes in under the door or leaks through windows or whatever. Doesn't matter, it gets in where ever it can…. and that air is HOT.

    So, the portable A/C continuously creates cool air which it then collects and blows out the window. Meanwhile, the same volume of hot air leaks in to replace it. Thus, no matter WHAT you do, you cannot get a decent temperature drop in the room.

    With a "normal" A/C, the air that's used to dissipate the heat that is pumped outside comes from outside. So the cool air get recycled around and around inside the room, which cools it down (providing it's kept closed) And the removed heat is moved outside using refrigerant, where the exterior fan dissipates it by blowing outside air.

    Anyway, this thing might be rated 3.5kW but that is misleading. It might not even work as well as a standard A/C of half that capacity. The chances of it making a difference to a 25 square metre room is incredibly slim. Our 2.4kW unit cannot cool a 3m x 3m child's bedroom, however it's really nice sleeping with the A/C blowing on you.

    • King Tightarse on 03/03/2016 - 19:51
      +1

      My Polocool complely cools down my large living room.
      Depends on the unit, many are under powered for a hot regular-sized lounge room. They are not as efficient as installed ac and yes they create a slight negative air environment but that really makes little difference in my air-leaky 1940s house. You need at least 4.5 kw to start being useful with these things Mine is 5kw and it is a godsend on the 40+ heatwave days. It does a good job and keeps the Mrs sane which in turn makes my life less stressful.
      I live in Melbourne so I onlt need it a few weeks of the year and then back to the storeroom.

      • llama on 03/03/2016 - 23:51

        We get far better real-world performance from a 2,4kW window A/C (plugged into power point)compared to 3.5kW portable trying to cool the same room. The window unit is far cheaper too.

        yes they create a slight negative air environment but that really makes little difference in my air-leaky 1940s house.

        It's not just a "slight" amount… these A/C are pulling in absolutely masses of hot air into the room to replace what gets blown out the window vent. Whilst the portables certainly blow lots of cool air, because they waste all their cool air they don't actually reduce the temperature of the room very well at all.

        • King Tightarse on 04/03/2016 - 00:57

          I agree but the sum effect is a cool room. Its not so bad. It's a compromise but I'm really OK with the compromise. They are only on for 5-6 hours max a few days of the year and they pull no more power than a portable heater. As for airflow, well my house has vents to outside in every room, you know, the old permanently open type built in from the days of open fires. Its never going to be efficient but the house has other charms. These units meet my needs. I get a cool lounge room for the few days I need it, If I lived in a northern state I would have a split system but for a few days or weeks of the year, its fine.
          Just got to get the lager ones to be effective, The best two I know are the Polocool 5 or 6KW or the Olympia Pui. Both of these do a good job for occasional cooling and can actually cool a whole room. Anything 3.5KW or less is only really suitable for small rooms such as bedrooms IMHO.

        • llama on 04/03/2016 - 04:18

          @King Tightarse:

          And you are in Melbourne, so you can imagine how ineffective they are farther north!

          To put it into context, a comparison… We are in North West Sydney, we can get our main bedroom (over 20 sq metres) down to 20C using a really old Panasonic 2.4kW window rattler. And that room currently only has ceiling insulation across half of the ceiling!

          We have a number of portable A/C and the best one is a Dimplex that is basically a full split system. There is one unit that goes on the ground outside, then some flexible hoses that run though the window to a large internal unit that looks like the one in this deal. That means all the heat stays outside, and it really is a proper A/C that is movable. They are discontinued now, I think they were banned due to risk that the hoses might split, and the escaping gas would puncture the ozone layer.

        • kima on 04/03/2016 - 09:13

          @llama: The older ones were exactly what you say - they actually heated the house not cooled it, but the newer ones are actually working better and are producing cooling. window box style are much better

        • King Tightarse on 04/03/2016 - 09:33

          @llama:
          Those older portables with an outside heat exchanger were the best. I wanted one of those when I bought mine but they were off the market by then. Beats me why no company offers a two air hose to window model. They could eliminate the negation air effect and increase efficiency quite easily. The Polocool already costs $800-$100 so I doubt adding another hose to the design would be too expensive.

        • llama on 04/03/2016 - 19:29

          @King Tightarse:

          Beats me why no company offers a two air hose to window model.

          Me too. There used to be a few models available here in Australia. Almost all the American ones have dual hose or at least provision for it.

          For those reading who don't know what we are talking about… the idea of a dual hose A/C is that the air that is needed for expelling the heat is sucked in via a hose from the outside, and then the hot air gets blown down a second hose to the outside.

          By not sucking up all the room's cool air, you suddenly create an A/C on wheels that is pretty much identical in performance to an in-window unit.

          Personally, I think that a window mounted A/C is a FAR FAR better solution. They are cheaper, work better, and are less intrusive in the room.

        • King Tightarse on 04/03/2016 - 20:12

          @llama:
          When i lived in Japan, I had a brilliant portable window model. It was tall and quite thin.
          You just got it out for summer and it placed it in the window frame,then closed the sliding window onto it. It exactly fitted the height of a standard Japanese window with rubber around each edge. Heat exchange was done outside, condenser passed cooled air inside. Was neither too heaver nor too noisy. Would love to have one of those here.
          Easy, simple effective.
          Image below is what I meant by two air hoses. You never see them but that would solve a lot of problems.
          http://www.everythingsimple.com/wp-content/uploads/2011/01/p…

        • llama on 05/03/2016 - 23:46

          @King Tightarse:

          You can buy those slim window A/C in Australia

  • battler on 08/03/2016 - 17:21
    +1

    now under $260 delivered with CTECHIE ebay code

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