Silver Crest 3 in 1 portable air conditioner £179.99 @ Lidl Salisbury

It's impossible to say exactly but here is some guidance.

The rated electrical consumption is stated as 1kW/h, so a maximum of 35p an hour at the moment on a standard tariff. But in practice it's less.

What I observe is that it takes in practice around 800w when cooling and 100w when fan only.

So when you initially turn it on the cooling function will be going all the time whilst it gets the temperature of your room down to your chosen temperature and at an equilibrium, and after that the cooling function will cycle off and on based upon the heat gains that are impacting the space you are cooling and how well you can isolate the Aircon exhaust from the cooled space. So after the initial cooling the actual power consumption depends how hard the unit has to work to maintain your set point.

I had my unit running on Wed for 4 hours in a large ground floor room 5m X 4m which was at 26C at the start and was cooled to 22C and it consumed 1.8kWh, or around 63p at standard rates.

On Mon it was running for 6 hours in a smaller space 4m X 3m which has higher external heat gain (loft room) and to maintain it at 23C consumed 3.7kWh or around £1.30 at standard rates.

So the amount of power you use is very much influenced by the thermal properties of the space you are trying to cool, gains and losses. The power consumption is higher initially to get the space under temperature control, but assuming it achieves your set point then moderates. Obviously 1C cooler on your set point will have a significant impact on your energy consumption and the amount of work the unit needs to do. (edited)

Any update with this?

3 year no quibble money back with Lidl though. Argos doing a “challenge” one twice the price for £400 1 year guarantee.

I have 4.5m X 4.5m loft conversion "cupboard" that I also use for sleeping in (ceiling usual 2.3m height) and the Silverline 7000BTU unit is able to chill it very effectively.

Yeah I just got a 12000 BTU one that is 65db. It is crazy how loud it is. Mostly because it’s a deep vibrating noise you can hear through the whole house.

Despite that, I am not a sweaty mess, so I’ll happily take the noise.

It will only need regassing if there's a gas leak. If it's under warranty you can get it repaired. Air con only needs gas put in if there is a leak somewhere on the system. They're not designed to leak.

yup, i just had mine where the vent pipe is now into the wall and works great

Yes. Just depends which stores have stock.

Yeah they all are. If it pumps cold air into your room then it has to pump the difference out somewhere else.

You can get “window kits” everywhere online for £10-£20. It’s like a white bag with a zipper hole in it that you velcro onto the window to cover the gap. A bit shoddy, but does the job

Depends, most of these reheat the condensate and dispose of it in the exhaust air making it quite humid. Difficult to say whether that would be enough to cause problems.

Yep compact packaging

De’longi pinguino supposed to be the best but a bit more expensive

When winter 2005?
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no

As above said,there’s plenty in the warehouse so depends which stores have them.