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Everything you need to know before you buy
Portable air conditioners vary dramatically in cooling power, noise levels, and energy efficiency. The key is matching the unit's BTU (British Thermal Units) rating to your room size and checking for features that separate genuinely effective models from budget disappointments.
| Type | Cooling Power | Typical UK Price | Best For |
|---|---|---|---|
| Single-hose portable AC | 7,000–12,000 BTU | £80–£180 | Small bedrooms, offices; basic cooling |
| Dual-hose portable AC | 10,000–14,000 BTU | £150–£280 | Larger rooms; more efficient, quieter |
| Window-mounted AC unit | 5,000–10,000 BTU | £120–£220 | Permanent installation; better efficiency |
| Evaporative coolers (air coolers) | Variable cooling | £40–£120 | Dry climates; energy-efficient, quieter |
| Smart portable AC | 9,000–15,000 BTU | £180–£280 | App control, scheduling; modern homes |
Look for units with Energy Rating labels (A–G), low decibel ratings (under 65dB is quieter), and dual-hose designs if your room is larger than 20 square metres. Avoid single-hose models for extended use—they create negative air pressure and pull warm air back in, wasting energy.
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Everything you need to know before you buy Portable Air Conditioners UK
Common questions about portable air conditioners uk
Most UK bedrooms measure 3m × 4m (12 square metres), requiring a 7,000–9,000 BTU unit. Measure your room's length and width, multiply them together, then divide by 10 to estimate BTU needs roughly. A 9,000 BTU unit cools most standard bedrooms efficiently without excessive noise. If your bedroom is smaller (under 10 square metres), a 7,000 BTU model suffices and uses less electricity. Larger master bedrooms (over 20 square metres) need 12,000+ BTU. Always check the manufacturer's room-size guidance on the product label.
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