Not everyone can, or wants to, hang an outdoor unit on the wall. Whether you rent, the building rules forbid it or you simply do not want the disruption, more and more people want to cool without drilling. The good news is that today there are units that perform almost like a fixed split without leaving any permanent trace. This guide covers how they work and what you need to fit one yourself.
What 'no installation' means
A no-installation air conditioner needs no engineer, no drilling the wall and no unit fixed outside. It pushes heat out through the window via a removable kit, and when you want, you take it out without leaving a mark.
That is the key difference from a traditional split, which needs pipework, a hole in the wall and an outdoor unit bolted to the building — something many freeholders and tenancy agreements do not allow.
Monobloc and split-type: two no-install options
Within no-installation units there are two families. The monobloc is a box with a hose to the window: simple and cheap, but noisy. The split-type portable separates the block that goes to the window from the one that cools, which cuts noise a lot and improves performance.
The Midea PortaSplit — the electriQ PortaSplit in the UK — is the benchmark of this second category: it fits without any building work in a few minutes, leaves no fixed outdoor unit and cools at 3.5 kW while staying around 39 dB(A). That is why it flies off the shelves among people who cannot touch the exterior of the building.
What you need to fit it
- An opening window near the unit (tilt-and-turn, sliding or sash).
- The included sealing kit, adjusted to your window type.
- An earthed socket within reach.
- Somewhere for condensate to drain, or a self-evaporating function.
No engineer or special tools are needed. Most people set it up in under half an hour the first time.
Real advantages and limits
The advantages are clear: zero building work, no permission for the exterior, portability between rooms and the ability to take it with you if you move flat. It is the logical option for renting and strict buildings.
The honest limit is that it needs a slightly open window for the hose, which costs a little insulation if the kit does not seal well. A well-fitted split-type portable minimises that loss, but it pays to seal carefully so you are not fighting the heat coming back in.
Frequently asked questions
Does it really need no installation at all?+
Correct. A split-type portable rests on the window with a removable kit and leaves no fixed outdoor unit or holes in the wall. When you take it out, the window is as it was, which is why it works for renting.
Can I fit it myself?+
Yes. You only need an opening window, the included kit and an earthed socket. No special tools or engineer are needed; most people set it up in under half an hour.
Does it cool as well as a fixed wall split?+
A well-sized fixed split is still the ceiling, but a split-type portable comes fairly close and clearly beats a monobloc. In return you avoid the building work, the engineer and the permission for the exterior.
Does it work in a building that bans outdoor units?+
Yes, that is exactly what it is for. By fixing nothing to the building, a no-installation unit usually fits where the freeholder bans traditional splits. Even so, always check your specific tenancy or building rules.
Read also
- Split-type portable vs monoblocTwo ways to cool without installation, with very different results
- Quiet portable air conditionerWhat dB(A) to look for, and why design beats any night mode
- How to install a portable AC in a windowStep by step to seal the kit for your window type and keep the cold in
- How to choose a portable air conditionerThe practical guide to getting the power, noise and running cost right
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