If you have short hair and dry it twice a week, the £30 hairdryer in the supermarket aisle is genuinely all you need. If you have shoulder-length-or-longer hair and dry it daily, the maths starts to bend. Faster drying means less heat exposure per session means less long-term damage. That's the case the Dyson Supersonic builds for itself, and it's actually a reasonable case — it's just not a £400 case for most people.
The honest finding from two months of testing four hairdryers across three UK households: the £30 mainstream dryer is adequate for most adults. The £400 premium offers genuine improvements (faster, gentler, more durable) but the gap is incremental, not transformative.
What actually matters
Three things, and the hairdryer marketing department mostly talks about everything except them:
- Wattage and airflow — 1800-2300W is the right range for adult hair
- Heat settings — at least two heat settings, ideally with a cool shot
- Build quality and longevity — premium dryers last 5-10 years; cheap ones 2-3
What matters less than the marketing suggests:
- "Ionic" technology (limited evidence)
- "Tourmaline" or ceramic coatings (mostly marketing)
- Specific colour or styling
The four worth knowing
Remington Pro Air at £30-£50. Budget-mid tier. Adequate performance for typical home use. The right answer for most UK adults using a hairdryer occasionally. Replace every 3-5 years.
Babyliss 2300W at £40-£70. Mainstream mid-range. Genuine 2300W performance, multiple heat settings, reasonable build. Good middle option if you want a slight step up from Remington.
GHD Helios at £170-£200. GHD's premium hairdryer. Less expensive than Dyson, similar quality of finish. The hair-styling industry standard for working stylists, which tells you something.
Dyson Supersonic at £330-£430. Dyson's premium hairdryer. Genuine engineering — faster drying, less heat damage thanks to temperature regulation, surprisingly compact, lighter than competitors. Lasts 7-10 years with care. The honest weakness is the price: actual performance is roughly 30% better than mid-range, not 10x. The 10x is the marketing.
How to actually pick
Most UK adults: Remington Pro Air at £40. Don't overpay; this is sufficient.
UK adults with long or thick hair drying daily: GHD Helios at £180. Genuine value upgrade — the gap between £40 and £180 here is more meaningful than the gap between £180 and £400.
UK adults committed to the premium experience: Dyson Supersonic during sales (£280-£330). Lasts 7-10 years; total cost over time isn't dramatically higher than replacing cheaper dryers every 2-3 years.
What I'd swerve: cheap £15-£25 supermarket hairdryers that fail within 12 months; "salon professional" brands at premium price without GHD-level engineering behind the badge.
A note on hair damage
The bit nobody mentions: the single biggest factor in heat-related hair damage isn't which dryer you use, it's whether you towel-dry first and use a heat protectant spray. A £40 dryer used carefully damages hair less than a £400 dryer used aggressively. Spend on the protectant before spending on the dryer.
Affiliate disclosure: Morningfold has affiliate partnerships with Dyson, GHD, Remington, and Babyliss. See editorial standards.