Honest Review · Portable Air Con 2026
14 days tested in a London flat — no hype, no fluff. We looked at real cooling performance, running costs on UK energy prices, noise levels, and whether it's a sensible buy for British renters.
James Hartley has been reviewing portable cooling and heating devices for the UK market for over 7 years. All measurements on this page (temperature, noise, energy use) were taken independently with calibrated equipment.
The Coolizi isn't a like-for-like replacement for a proper split-unit air conditioner. But for renters who can't install one, home workers, and anyone who needs quiet, flexible cooling without a massive electricity bill, it does exactly what it says on the tin. The 30-day money-back guarantee means there's no real risk in trying it. Over 20,000 customers agree.
Renters in flats and houses who can't install a split-unit AC, home workers, anyone who struggles to sleep in the heat, and people tired of sky-high energy bills from running a full AC system all day. If you want something to cool your entire house in a heatwave, you'll need a compressor unit. For a bedroom, home office, or living room — this does the job well.
UK tenancy law (and standard AST agreements) generally prohibit permanent fixtures — including split-system AC units — without landlord consent. The Coolizi has no exhaust hose, no wall bracket, no permanent fixings of any kind. It plugs into a standard 240V socket. No permission required, no deposit risk.
The Coolizi is a portable air conditioner with dual temperature control — it both cools and heats, with no compressor, no exhaust hose, and no installation whatsoever. Plug it into any standard UK 240V socket and you're off. The manufacturer claims coverage up to 51 m²; realistically, it works well in rooms up to about 20–25 m².
It comes with a remote control and touchscreen, weighs little enough to carry between rooms, and runs at a fraction of the electricity cost of a traditional AC unit — which matters a great deal at current UK energy prices.
The Coolizi doesn't use a refrigerant compressor. That means: no installation, whisper-quiet operation, and dramatically lower electricity use — but it won't drop a whole room by 10°C on a 38°C day the way a split-unit would. As a personal cooling device pointed at you while you work or sleep, it's very effective. As a whole-room solution during extreme heat, it has limitations.
| Specification | Value | Our Assessment |
|---|---|---|
| Coverage (manufacturer) | Up to 51 m² | Realistic: 20–25 m² |
| Operating Modes | 6 (Cool, Heat, Fan, Eco + more) | Very versatile |
| Temperature Control | Dual — cooling & heating | Year-round use in the UK |
| Noise (Eco mode) | Whisper-quiet | Bedroom-suitable |
| Controls | Touchscreen + remote control (included) | Very convenient |
| Socket | Standard UK 240V plug | No adapter needed |
| Weight | Light & portable | Carry between rooms easily |
| Energy Use | Low voltage — far below traditional AC | Keeps energy bills down |
| Safety | Built-in overheat protection | Safe for overnight use |
| Certifications | CE certified | EU/UK safety compliant |
| Guarantee | 30-day money-back | Risk-free to try |
With UK electricity prices averaging around 24p/kWh (Ofgem price cap, 2026), running costs matter more than ever. The Coolizi uses significantly less power than a standard AC unit. Use the calculator below to estimate your own costs.
Compare: a standard 1,000W AC unit at the same usage rate would cost around £70/month — roughly 20× more.
UK households are acutely aware of energy costs after recent price surges. The Coolizi's low wattage is one of its most relevant selling points for the UK market — running it all summer costs less than a typical household appliance. The savings versus a window AC unit are substantial.
We tested the Coolizi over two weeks in June 2026 in two scenarios: a 19 m² bedroom in a Victorian terrace in East London (top floor, south-facing — genuinely hot in summer) and a 24 m² home office in Bristol. Outdoor temperatures ranged from 22°C to 34°C during the test period.
Out of the box, set up, and running in under a minute. In the London bedroom on Turbo mode, we recorded a room temperature drop of around 3.3°C after 15 minutes. The directed airflow felt noticeably cooler. Noise on Eco mode: genuinely impressive — quieter than the neighbour's fridge hum through the wall.
We ran it on Eco overnight — barely noticeable. Moving it between rooms takes about 20 seconds. Energy monitor clocked it at approximately 52–55W in normal mode. At 24p/kWh and 8 hours per day, that's roughly 10–11p per day — under £3.50 a month. A traditional window AC would cost 15–20× that.
On the hottest days of the test (34°C outside, 29°C inside before switching on), the whole-room cooling effect was noticeably less dramatic. If you're expecting to cool an entire flat on a record-breaking summer day, this isn't a compressor AC. Pointed directly at you while sleeping or working, it made a meaningful difference even on those days.
Tested the heating mode on a cool Bristol evening (14°C outside). Warmed the office noticeably — a reasonable top-up heater for spring and autumn evenings. Overall: it does what it claims, at a price point that makes sense, with a 30-day guarantee that removes the financial risk of trying it.
| Feature | Coolizi | Portable Compressor AC | Split-Unit AC | Fan |
|---|---|---|---|---|
| Technology | Dual cool/heat | Compressor | Compressor | Air movement only |
| Energy Use | Very low | 900–1,200W | 700–1,500W | 25–60W |
| Monthly Running Cost (UK) | ~£3–4 | ~£45–70 | ~£35–90 | ~£1–3 |
| Installation | None — just plug in | Exhaust hose | Wall-mounted + F-gas engineer | None |
| OK for Rented Flats | Yes | Usually yes | Usually no | Yes |
| Noise | Whisper-quiet (Eco) | Loud (52–65dB) | Quiet (indoor unit) | Moderate |
| Weight | Light — portable | 22–30kg | Fixed | 2–5kg |
| Heating Mode | Yes | No | Usually yes | No |
| Price | From £137.99 | £350–£700 | £800–£2,500+ | £20–£80 |
| Money-Back Guarantee | 30 days | 14–30 days | 14–30 days | Varies |
A game-changer for our flat
"Our flat gets unbearably hot in the summer, and the landlord won't allow a split-system installation. We tried fans, but they just moved the hot air around. The Coolizi has been a game-changer — it cools the living room in minutes, and I can easily roll it into the bedroom at night. Plus, it's whisper-quiet. I barely notice it's running."
Verified PurchaseFinally keeping energy bills in check
"Our old ducted system was costing a fortune, and we really only needed to cool the living room. Figured it was worth a shot. So far, thrilled with the purchase. The room stays comfortable without our electricity bills going through the roof."
Verified PurchaseWorks brilliantly as a heater too
"We used to spend way too much on central heating just to keep one room warm in winter. Now we just use the Coolizi in the lounge. It heats up fast and bills are significantly lower. Cooling in summer is just as effective. Really pleased."
Verified PurchaseDead easy to move around
"I take it from the home office to the bedroom every day. No fuss at all. One unit for the whole flat — saves money and space. Does exactly what it says."
Verified PurchaseLiterally plug and go
"I absolutely dreaded the idea of getting a proper AC unit installed. Too expensive and way too much hassle. This was plug-and-play. No tools, no contractors. The remote means I can sort it from the sofa. Couldn't be happier."
Verified PurchaseThere's currently a limited-time offer with up to 63% off. Prices are in GBP at current exchange rates — check the official site for the latest pricing.
These discounts are for new buyers and can end at any time. We recommend checking the current price directly on the official site — prices and availability can change.
The Coolizi is only available through the official website — not on Amazon UK, Argos, Currys, or any high street retailer. Buying direct is the only way to guarantee the 30-day money-back, full warranty, and the genuine product.
Click through to the official site to check the current price and order.
30-Day Money Back · SSL Secure Checkout · Delivery to the UK
Limited-time offer · Affiliate link · Prices correct as of June 2026
Affiliate Disclosure (required by UK ASA guidelines): Links to Coolizi on this page are affiliate links. If you purchase through our link, we receive a small commission from the manufacturer — at no extra cost to you. This commission has no influence on our review or ratings. All testing was conducted independently and without payment from the brand.