Pro Breeze 12,000 BTU air conditioner review: a lifesaver in a heatwave

Price on writing: £700 | Buy now from Pro Breeze

How I tested

I tested the Pro Breeze 12,000 BTU portable air conditioner over the course of a month, including during a two-week heatwave. I used it mainly in my study, but also in a large bedroom to pre-cool the room before bed.

During normal working days at home, including the hottest part of the day, I used it to see whether it kept the study comfortable enough to work in. I also used the timer for one-hour cooling sessions before bed, tried the remote from across the room and from bed, tested the airflow direction, used the fan-only mode and moved the unit across hard flooring and over a rug.

I looked closely at cooling speed, ease of set-up, window kit faff, noise, portability, storage, build quality and how practical it felt in a real home rather than an ideal room with perfect window placement. I didn't fully test the dehumidifier mode or use the app day to day, so those features are included as manufacturer specifications rather than based on my own experience.

Related: Best portable air conditioners

My verdict

If you’re fed up with heatwaves making it hard to work, sleep or sit comfortably at home, the Pro Breeze 12,000 BTU 3-in-1 Smart Portable Air Conditioner does the job well. I tested it for a month, including during a two-week heatwave, and it made a noticeable difference in both my study and bedroom.

It works best in a single room with the door and window closed. My study measures around 13m², and it took about half an hour to bring the room down to a much more comfortable temperature. Pro Breeze says it's suitable for rooms up to 30m², so my study was comfortably within its stated capacity.

It also worked well in a large bedroom before bedtime. I set the timer to run for an hour before going upstairs and found the room cool enough to fall asleep comfortably. I wouldn't leave it running overnight. It's too noisy for me, and sleep mode didn't make enough difference. The mode turns off the display lights and gradually reduces the fan speed automatically, but the machine still plays a short tune whenever you press a button.

The biggest downside is the weight. It has castors that move well on hard floors, but at 27.3kg it's still a hefty appliance and there are no built-in handles. I could move it around on the same floor, although door thresholds took some effort. Carrying it upstairs wasn't realistic on my own. It feels sturdy and well made, but lacks some of the carrying features I've seen on other portable air conditioners, including the MeacoCool MC Series Pro 10000 BTU.

Overall, it's a good-value portable air conditioner for anyone who wants effective cooling during hot weather and has somewhere to store it. It works particularly well in a home office, for cooling a bedroom before bed or for making a stuffy room more comfortable during the hottest part of the day. Just be aware that it's noisy and awkward to move between floors.

Pro Breeze 12,000 BTU portable air conditioner: what's in the box?

The Pro Breeze comes with the main unit, exhaust hose, window kit and two remotes. The second remote is a useful extra, although I mainly kept it as a spare.

• Pro Breeze 12,000 BTU portable air conditioner

• Exhaust hose

• Window venting kit for sliding windows

• Fabric window sealing kit for hinged windows

• Two remote controls

• Batteries

• User manual

What's the Pro Breeze 12,000 BTU portable air conditioner like to set up?

The first thing you'll notice is the weight. I managed the unpacking and assembly alone, but two people would make it much easier. I couldn't have carried it upstairs without help.

As with most portable air conditioners, the window kit is the fiddliest part. I used the fabric kit with a side-hinged casement window. It sealed reasonably well, although small gaps are hard to avoid with this type of setup.

Using the kit properly makes a difference. I also tried running the hose through an open window without it and cooling performance dropped noticeably.

The hose takes a bit of manoeuvring, but it's long enough to work around most room layouts. Once installed, everything worked as expected. I didn't see any condensation, damp patches or water collecting around the hose or window during testing.

You'll need to think about placement. The hose length, window position and required clearance around the unit all limit where it can go. After an hour of use, the back of the machine felt quite warm, so it isn't something I'd push tightly into a corner.

Read next: Best air conditioners for bedrooms

What's the Pro Breeze 12,000 BTU portable air conditioner like to use day to day?

Day-to-day use is straightforward. I mostly relied on the remote and the controls on the unit rather than the app. Both were simple and intuitive. The remote worked reliably from across the room and from bed, which made timer and airflow adjustments easy.

WiFi control is available through the Pro Breeze app, along with Amazon Alexa and Google Home compatibility.

The louvres are easy to adjust and the remote includes an airflow-direction button. In my long, narrow study, I could feel cool air reaching about halfway across the room. Direct airflow didn't reach the far end, but the room still cooled effectively overall.

The three fan speeds produce noticeable changes in airflow, though less difference in noise. From the room below, it was comparable to hearing a dehumidifier or vacuum cleaner upstairs through the floorboards.

The unit felt stable throughout testing, with no rattles or wobbling. I used it on both hard flooring and a rug without issues. The castors work well on the same floor, but the weight is always noticeable.

Sleep mode switches off the display lights, which I appreciated. The button sounds were more irritating. Every press triggers a short tune and sleep mode doesn't disable it.

Related: Best quiet fans

Is the Pro Breeze 12,000 BTU portable air conditioner good value for money?

At £700 on the Pro Breeze website at the time of writing, this is a significant purchase.

The cooling performance is very good. It cooled my study quickly, made working during a heatwave far more comfortable and helped cool a bedroom before bed. Build quality also feels reassuringly solid.

Running costs are worth considering. Pro Breeze states a running cost of 20p per hour and lists energy consumption at 0.78kWh. Using Ofgem's average electricity rate of 26.11p per kWh for Direct Debit customers between 1 July and 30 September 2026, that works out at roughly 21p per hour. Actual costs will depend on your tariff and usage.

I used it selectively, mainly during the hottest part of the day and for an hour before bed, and didn't notice a major increase in electricity use.

Whether it represents good value depends largely on how comfortable you are with the size, weight and noise. If you want effective room cooling and don't need to move it between floors regularly, it's easy to recommend. If portability is a priority or you're hoping to run it beside your bed overnight, think carefully before buying.

About the author

Poppy O'Neill is a Content Editor at Mumsnet and a mother of two. She researches and reviews the products Mumsnetters swear by, with a particular focus on home essentials like steam irons, vacuum cleaners and heated throws.

From a highly recommended retractable washing line to the best quiet fans money can buy, and Mumsnet's favourite dehumidifier to the steam generator iron that'll cut your ironing time in half, she loves to deep-dive into research and find the very best products on the market.