Why a £137 portable air cooler is replacing wall-mounted air conditioners in small flats this summer. It is not magic, it is not a miracle cure: here is what it really does, and what it does not

Do you rent, live in an older building or in a block of flats that bans outdoor units, and find you can no longer sleep in the heat? Then this story will completely change how you deal with summer at home.

First of all, Whitfield wanted to clear up the difference that causes the most confusion: the difference between moving air and actually cooling it.

"A fan does not lower the room temperature by a single degree," he says. "It takes the warm air that is already there and blows it at you faster. You feel some relief as your sweat evaporates, but the thermometer does not budge. Five minutes later you are hot again."

EpiCooler works completely differently. It draws in the warm room air and passes it over high-efficiency cooling coils. It is exactly the same principle as the fridge in your kitchen: a refrigerant gas circulates through the coils, absorbs the heat from the air passing over them and carries it away, so the air coming out the other side is genuinely colder, not just moving.

In practice it is a small fridge that, instead of cooling a sealed compartment, cools the room you are in. That is why, when you get close, it feels like opening the fridge door: real cold air, not a puff of lukewarm air.

With that cleared up, Whitfield was keen to spell out what EpiCooler is and what it is not, because this is where most of the confusion starts:

• It is not a wall-mounted air conditioner. It does not cool the whole house: it is designed for one room, your living room, bedroom, kitchen or home office.
• It needs no installation. No exhaust hose to the outside, no hole in the wall, no permission needed. You plug it in and it works
  

Whitfield's reasoning starts from something he knows well from his trade: a wall-mounted system is sized to cool the entire volume of a home, even the rooms you never set foot in.

"If you only need to cool the living room where you watch TV, or the bedroom where you sleep", he explained, "a unit that works on that single room does the job while using far less energy."

EpiCooler was born from exactly this logic: a portable air cooler that weighs around 2.1 kg, plugs into a standard wall socket and cools a room in about five minutes, dropping the temperature by roughly 9°C.

No hole in the wall, no unit to mount on the outside of the building, no engineer to call. You take it out of the box, plug it in and it works.

It is this simplicity that got people talking: in online groups for renters and for people living in blocks that ban outdoor units, the word of mouth started on its own.

Within a few weeks, stock sold out several times over, especially as the first heatwaves arrived.

• Cools rooms of up to 51 m² (approx 550 sq ft), dropping the temperature by around 9°C in just a few minutes
• Uses up to 75% less electricity than a traditional wall-mounted air conditioner, because it only cools the room you are in
  

Whitfield was not surprised. To him it is simply physics applied properly.

"In twenty years working with these systems I have learned one thing: the cool air you need is the air around you, not the air at the end of the hallway", he says. "A portable unit working on the right room does exactly that, and uses a fraction of the energy."

This is not a passing fad.

Since EpiCooler arrived on the European market, thousands of units have been sold directly to consumers, mostly to people who cannot install a fixed system.

Every time the warehouse is restocked, the product sells out within days as the heatwaves hit.

The secret? Word of mouth.

People who try it for one room often order a second for the bedroom or the home office, and recommend it to friends, neighbours and colleagues facing the same problem. A chain of spontaneous recommendations that no advertising campaign could ever replicate.

And the reviews confirm it: most customers describe a room that becomes liveable within minutes, with a unit like this weighing far less on their energy bill than a big system would.

The stories our editorial team collected are surprisingly consistent with one another.

Three examples from the hundreds we received:

• Mark, 47, Manchester: "I rent and my landlord will not allow outdoor units on the building. I thought I was in for another summer with a fan. With EpiCooler the bedroom finally became liveable, and in five minutes."
• Margaret, 71, Leeds: "I live in a 1960s block where you cannot drill into the wall. I just plug it into the socket and that is it. At night I switch it to night mode and I barely hear it."
• Joseph, 56, Liverpool: "A fixed system for my two-room flat cost over a thousand pounds with the unit and installation. This was all I needed for the room where I spend the whole day, and it weighs far less on the bill."

The common thread across these reviews?

Almost no one expected to feel genuinely cold air coming from such a small unit.

The first reaction of anyone who tries it is nearly always the same: initial scepticism (they think it is a fan), followed by surprise when the air actually turns cold, and then the relief of finally being able to sleep at night.

"I had already bought two fans that only pushed warm air around", writes a customer from Bristol. "This one really chills the air. I should have started here."

The three most common objections

• "It will be the usual fan in disguise." No. A fan moves warm air around, EpiCooler chills it with high-efficiency cooling coils, just like a mini-fridge. That is the difference you feel on your skin.
• "So it cools the whole house?" No, and it is important to know this. It is designed for one room at a time, up to 51 m² (approx 550 sq ft). For an entire house you need a fixed system. For the room where you actually live, it is perfect.
• "And what if it does not convince me?" The manufacturer offers a 30-day money-back guarantee, in line with UK consumer rights.

What we checked

We tried EpiCooler in a bedroom, in an open-plan office and in a small living room. The result was consistent: noticeably cooler air within minutes, from a unit that simply plugs into the socket.

The test in the hottest room in the office

To be sure this was not just an effect staged in well-shot videos, we plugged EpiCooler into an ordinary wall socket in a south-facing room, the one that stays muggiest in the evening.

No installation, no hose to the outside: we took it out of the box and switched it on in Cool mode.

The result after five minutes:

"The air turns cold, not just moving. You feel the difference the moment you get close, like opening the fridge door. The thermometer dropped by several degrees."

What stands out is not only the cool air, but the versatility. EpiCooler has six different modes, so it is not a single-purpose box that does one thing.

We then tried to:

• Use Night mode in the bedroom: quiet, almost imperceptible
• Switch on Dehumidify mode on a humid day
• Test the Heat function to see how it behaves in winter
• Move it from one room to another with no installation at all

In every case the result was simple and immediate, with consumption clearly lower than a traditional wall-mounted system, because EpiCooler only cools the room you are in rather than the whole house.

We lent EpiCooler to three different people among colleagues and family, in three British cities, in three completely different rooms.

The responses came back within a few days:

"I finally slept the whole night through without waking up in a sweat."

"My home office is cooler than I expected", wrote a colleague who works from home. "And I do not have to call anyone to install it, there is no hose to feed out of the window."

The most candid comment came from an eighty-year-old aunt: "I switched it on by myself without asking anyone. You just plug it into the socket and that is it. In the evening I put it on night mode and I do not even hear it."

At that point we went back to James Whitfield. We wanted to understand how it really works, from a technical point of view.

The five details that make EpiCooler different from a simple fan

✅ High-efficiency cooling coils

What does a fan do? It takes the air in the room and moves it faster: if the air is warm, it blows warm air at you. The temperature does not change.

EpiCooler passes the air over high-efficiency cooling coils, the same principle as a mini-fridge. The air that comes out is genuinely colder, not just moving. That is the difference you feel on your skin.

✅ It only cools the room you are in

A big fixed system is designed to cool the whole house, including the empty rooms. EpiCooler concentrates the work on the single room you are in, up to 51 m² (approx 550 sq ft). That is why a standard wall socket is enough, and that is why it uses up to 75% less electricity than a traditional wall-mounted air conditioner.

It is the sensible choice for the living room, bedroom, kitchen or office: cool air where you need it, without wasting energy elsewhere.

✅ Zero installation, plug and play

No exhaust hose to the outside. No hole in the wall. No freeholder's permission needed. No engineer to call.

You take it out of the box, plug it into any socket and it works. It weighs around 2.1 kg, so you can move it from one room to another in seconds: the living room by day, the bedroom in the evening. It is the solution designed precisely for renters or for buildings where you cannot touch the walls.

✅ Six modes plus remote and touch display

EpiCooler does not do just one thing. It has six modes: Cool, Heat, Night, Dehumidify, Eco and Turbo. It cools down to 16°C and, in winter, heats up to 45°C, so you can use it all year round.

You control it with the remote or the touch display, without having to stand next to the unit. Night mode makes it almost imperceptible while you sleep.

✅ Honest about its limits from the start

We will say it plainly, just as the engineer told us: in Turbo mode, at full power, EpiCooler makes a bit of noise, like any unit running flat out. In Night mode, on the other hand, it is almost silent.

And it does not replace a fixed system in an entire house: it is a solution for one room at a time. For that room, though, it is exactly what you need.

Once we had tried it in the office, we looked up the price on the official website.

Recommended retail price: £344.98

Considering that a fixed system usually costs between £800 and £1,200 plus installation, the list price still seemed appealing for anyone who cannot or will not drill into the walls.

But the manufacturer, during its European market launch, activated a 60% discount for early customers, bringing EpiCooler down to £137.99.

A few days after ordering, the parcel arrived.

Opening the box: the unit is compact and light. It weighs around 2.1 kg, you can move it with one hand, clean finish, with remote and touch display.

The first three days of use:

Day 1:

✅ Time to be up and running: plug it into the socket and it starts, no installation
✅ A room of around 18 m² (approx 195 sq ft): noticeably cooler air within minutes
✅ Night mode: quiet, almost imperceptible while you sleep
✅ No hole in the wall, no hose to feed out of the window

After the first test, we had already recommended it to three people in the office.

After a week of use:
✅ Bedroom: nights finally liveable, no more waking up in a sweat
✅ Night mode: quiet, does not disturb sleep
✅ Moved from the living room to the bedroom with no effort
✅ Dehumidify mode handy on the more humid days
✅ Nothing done to the wall, all plug and play

After a month:
✅ Used in the living room by day and the bedroom at night
✅ Eco mode for the less hot hours
✅ Turbo mode to cool down quickly when getting home (noisier, but fast)
✅ The remote is handy for adjusting everything from the sofa
✅ Far gentler on the bill than a wall-mounted system

After the summer (continuous use):
✅ No drop in performance compared to day one
✅ Tested the Heat function as the first cold weather arrived
✅ Several acquaintances ordered one after seeing it
✅ The old fans have stayed in the cupboard
✅ A single unit that serves all year round, hot and cold

To find out, we went back once more to James Whitfield, the refrigeration engineer who had explained how it works.

He kept it on trial for two weeks, at home and in a few of his clients' flats.

His first comment was blunt:

"I expected a toy. Instead it really does cool the room, it does not just move air around."

After using it in the field, his verdict was concise:

"For anyone with a room to cool who cannot install a fixed system, it is a surprisingly sensible solution. Cheaper to run than a big system, because it only works where you need it, and no installation."

Honest about the limits too: "In Turbo mode you can hear it, like any unit at full power. In Night mode, on the other hand, it is genuinely quiet. And obviously it will not cool an entire house: it is designed for one room at a time."

The most telling detail? After the trial he recommended one to several clients who had the same problem.

Let us compare the options.

A fixed wall-mounted system usually costs between £800 and £1,200, on top of which you have to add the engineer's installation, the hole in the wall and the outdoor unit on the building. When you rent or live in many blocks of flats, it is often not even possible.

A fan costs little, but it only moves warm air around: on muggy nights it does not really bring the temperature down.

EpiCooler, at the 60% discount, costs £137.99 and plugs into any socket with no installation at all. It genuinely cools the room you are in and, by cooling only that room, it uses far less energy than a fixed system and is gentler on your bill.

That is why many British families are buying it in pairs, one for the bedroom and one for the living room or the office (the 2-pack brings the price down to £110.99 per unit).

James Whitfield summed up his opinion in a single sentence:

"It is not magic and it is not a miracle cure. It is simply the right solution for anyone who needs to cool a room and cannot fit a fixed system."

And the people who try it are proving him right.

If you have ever spent a sleepless night because of the heat, or given up on a fixed system because you rent or live in a block of flats that bans outdoor units, then you know exactly what we are talking about.

This is not a simple fan.

• It is a night of real sleep instead of one spent tossing and turning
• It is a cool room without calling an engineer and without drilling into the walls
• It is a solution you use all year round, because it cools in summer and heats in winter

All of this within easy reach, by plugging it into a socket you already have at home.

After publishing our EpiCooler test, we received dozens of messages from readers. What struck us is the variety of situations in which they use it: from the bedroom to the home office, right through to heating in winter.

EpiCooler introductory discount

Word of mouth around EpiCooler is in full swing: thousands of units sold within a few weeks, mostly to people who rent or cannot install a fixed system.

The list price is £344.98. With this 60% discount, reserved for the readers of this article, you pay £137.99 (and in the 2-pack it drops to £110.99 per unit) and you get:

✅ Fast shipping from the warehouse, tracked across the UK

✅ 30-day money-back guarantee

✅ Six modes (Cool, Heat, Night, Dehumidify, Eco, Turbo), remote and touch display

Stock at the introductory discount is limited.

Click the button below to order EpiCooler and feel the difference for yourself.

EpiCooler is not for anyone who needs to cool an entire house. For that, big fixed systems exist, more expensive and with installation, but justified when you need to climate-control the whole home.

EpiCooler is for anyone who wants to cool the room where they actually live: the bedroom, the living room, the kitchen, the home office. For people who rent, live in an older building or in a block of flats that bans outdoor units. For anyone on a limited budget who does not want to drill into the walls.

Discover EpiCooler with 60% off.

In short

A portable air cooler of around 2.1 kg that plugs into a standard wall socket, cools a room of up to 51 m² (approx 550 sq ft) within minutes, with six modes, a remote and a touch display. In winter, it heats.

No hole in the wall. No installation. No permissions.

It is not magic and it is not a miracle cure: it is a simple solution for anyone who needs to cool a room and cannot fit a fixed system. For that situation, it is well worth giving it a chance.