01
Evaporation steals the heat
As water turns to vapour it absorbs heat from the air — that's what actually cools the room, not the fan.
Verified specs. Rooms that actually cool.
Stay cool,
whatever the weather.
Meaco, De'Longhi, Shark, Princess — the big brands, in stock now. No installation, no venting, no drilling. Delivered fast, across ROI, the UK & the rest of the EU.
Fraction of AC powerFree fast delivery2-year guarantee
Keep rooms ventilated and air fresh — all summer long★★★★★ for the Shark FlexBreeze HydroGo — T3"This near perfect Shark gadget" — The TelegraphIdeal Home tested the MeacoCool MC Series 7000BTUFree fast ROI & UK delivery — rest of the EU included14-day returns — your statutory right2-year guaranteeRuns on a fraction of AC power
The maths is simple
Air conditioning means drilling, pipes and weeks of waiting. Cold air shouldn't.
Fixed air conditioningFrost & Fern cooler
Power draw1200Wfrom 4W
InstallationDrilling, pipes, landlord permissionPlug it in. Done.
When you get it4–6 week waitTomorrow
No installation~94% less energyFree fast delivery
Bestsellers
The coolers everyone's buying right now
Why evaporative cooling works
Nature's air conditioning, bottled.
02
Drier air, bigger drop
The drier the incoming air, the more evaporation can happen — which is why coolers shine in dry-to-average humidity.
03
A fraction of the power
No compressor, no refrigerant — just a fan and a small pump, drawing a fraction of the power of portable AC.
Curious about running costs? Every product page has a live cost calculator
Find your kind of cool
Every room. Every kind of heat.
Buying guides
Work out what you need before you spend
All 14 guides →How to Cool a Room Without AC
Nine methods, ranked by cost and noise
Read the guide →
Air Cooler vs Portable AC
Which should you actually buy?
Read the guide →
Portable AC Without a Hose
The no-hose option for renters
Read the guide →
Running Costs, in Pence
What coolers really cost per hour
Read the guide →
Quiet Coolers for Bedrooms
Noise in dB, for light sleepers
Read the guide →
Air Coolers Under £100
Value ranked by spec
Read the guide →
Why Frost & Fern
Cooling you can verify.
The air-cooling market is crowded with marketplace listings and invented superlatives. We stock a curated range — the spec sheet on every page.
Spec-transparent range
Every product lists the numbers that matter — tank size, airflow in m³/h, noise in dB, and power draw.
Real running costs
Our coolers draw 0–1350W — a fraction of what portable air conditioning draws. Running costs and local electricity rates are calculated on every product page.
Zero installation
Air coolers need no hoses, no window kits and no drilling — fill with water and plug in. Portable air conditioners can’t say that. Running costs are calculated from each unit’s power draw, and every unit carries a 2-year guarantee.
The science of cool
Heat does measurable things to your head. So does a cool room.
13.4%
slower reaction times (and 13.3% slower working-memory responses) measured in homes without cooling during a real heatwave, versus air-conditioned homes.
−2.7 min
of sleep lost for every +1°C of overnight indoor temperature — and heat also cuts slow-wave and REM sleep, with humid nights worse.
Cedeño Laurent 2018 · Okamoto-Mizuno & Mizuno, J Physiol Anthropol, 2012
2×
energy use for cooling in EU households doubled in six years (2018–2024) — homes need cooling that works for the summers we actually get.
In the press
Named, rated and reviewed by Britain’s home experts.
Independent reviews
“An incredible portable fan… nails the brief” ★★★★★T3 — on the Shark FlexBreeze HydroGo
Fair questions. Straight answers.
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