At the top of the premium hair dryer market sit two tools that take fundamentally different engineering approaches to the same problem. The GHD Helios prioritises raw airflow velocity — at 120 km/h it is among the fastest consumer dryers ever made — while the Dyson Supersonic prioritises thermal precision, taking 40 temperature readings per second to prevent heat damage. Both tools cost significantly more than a good mid-range dryer. Whether that premium is justified — and which tool justifies it for your hair — is what this comparison settles.
Engineering Philosophy: Speed vs Precision
GHD and Dyson approach hair drying from opposite directions. GHD's Helios is built around a principle of reducing drying time through raw airflow velocity. Its motor generates airflow measured at 120 km/h — a figure GHD achieved by optimising impeller blade geometry and reducing internal airflow resistance in the barrel. The engineering logic: the faster you move air over wet hair, the faster water evaporates, and the less total heat exposure the hair requires.
Dyson's Supersonic is built around a principle of reducing heat damage through thermal precision. Its V9 digital brushless motor runs at up to 110,000 RPM, and a glass bead thermistor in the airflow path takes 40 temperature readings per second. When measured exit temperature approaches a target threshold, the system adjusts power to the heating element within milliseconds. The engineering logic: controlled, consistent temperature is less damaging than high-heat, high-speed drying even if total drying time is similar.
The key philosophical difference: GHD Helios minimises heat exposure by drying faster. Dyson Supersonic minimises heat damage by staying below the temperature threshold at which keratin bond disruption occurs. Both approaches are scientifically valid — which matters more depends on your hair type.
Motor Comparison
The GHD Helios uses a brushless AC motor rather than the digital brushless architecture Dyson employs. This is a meaningful distinction. AC motors — even brushless ones — use fixed-frequency alternating current to drive rotation, which limits their maximum RPM and efficiency profile at high speeds. GHD compensates with exceptional impeller design and aerodynamic shaping of the internal airflow path, achieving the 120 km/h airflow despite motor architecture that is less exotic than Dyson's.
The Dyson Supersonic's V9 motor spins at up to 110,000 RPM — faster than any AC motor in a consumer dryer. Digital brushless motors use solid-state electronics to control current direction, enabling higher RPMs, lower electrical resistance losses, and more precise speed control. The motor sits in the handle rather than the barrel, redistributing weight for better balance. At 43mm diameter, it is Dyson's smallest motor and produces the least vibration of any motor in a consumer hair dryer.
120 km/h
GHD Helios airflow velocity — among the highest ever measured in a consumer hair dryer
GHD Technical Specifications, 2024
Heat Technology Head-to-Head
The GHD Helios has three heat settings plus a cold shot. Published maximum temperature is not disclosed by GHD, but third-party measurements place exit air temperature at approximately 210°C on the high setting and 170°C on medium. GHD's heat management focuses on consistent heating element performance rather than active closed-loop feedback — the Helios uses a fixed heating element calibrated for each setting rather than a real-time feedback system.
The Dyson Supersonic's thermistor-based system produces exit temperatures of approximately 100°C, 140°C, and 150°C across its three heat settings, with a variance of ±3°C. The cold shot produces room-temperature air. This precision is unmatched at any price point in the consumer dryer market. The Supersonic will not exceed 150°C regardless of conditions — a meaningful safety guarantee for fine and colour-treated hair.
TIP: If you have fine, bleached, or colour-treated hair, the Dyson Supersonic's temperature ceiling of 150°C is a material safety advantage over any dryer — including the GHD Helios — that reaches 200°C+ on high settings.
Attachments Compared
The GHD Helios ships with a concentrator nozzle and a diffuser. The concentrator is the best in any premium dryer — wide, with a flattened exit that directs airflow with exceptional precision for sectioned blowouts. The diffuser is circular with standard-length prongs and performs well on curly and wavy hair. GHD sells an additional professional concentrator separately.
The Dyson Supersonic ships with more attachments depending on the bundle: a styling concentrator, smoothing nozzle, diffuser, wide-tooth comb attachment, and a gentle air attachment for scalp-sensitive or very fine hair. All attachments are magnetic with a single-motion click-fit. The Dyson attachment variety is greater — the GHD concentrator design is superior in its category.
Noise Levels
Both dryers market themselves as quieter than conventional options. The GHD Helios measures approximately 78 dB(A) at 1 metre on high — genuinely quieter than the 85–88 dB(A) of most AC induction dryers. The Dyson Supersonic measures approximately 77 dB(A) at 1 metre on high — broadly equivalent and similarly impressive. For either tool the noise character differs from conventional dryers: higher-frequency, less rumbling, more of a consistent hiss rather than a roar.
| Spec | GHD Helios | Dyson Supersonic |
|---|---|---|
| Price | ~£299 / $299 | ~£429 / $429 |
| Motor type | Brushless AC | Digital brushless V9 |
| Airflow speed | 120 km/h | ~110 km/h (est.) |
| Max exit temp | ~210°C (high setting) | 150°C (hard cap) |
| Temp readings/sec | N/A (fixed element) | 40 |
| Temp variance | Not published | ±3°C |
| Heat settings | 3 + cold shot | 3 + cold shot |
| Attachments included | 2 (concentrator, diffuser) | 4–5 depending on bundle |
| Noise level | ~78 dB(A) at 1m | ~77 dB(A) at 1m |
| Weight | 347g | 641g |
| Cord length | 3m swivel | 3m swivel |
| Warranty | 2 years | 2 years |
Weight and Ergonomics
The GHD Helios weighs 347g — notably lighter than the Dyson Supersonic at 641g. For a professional stylist working for 8+ hours, that weight difference is significant. For a home user styling for 20 minutes, it is barely perceptible. The Dyson compensates for its weight with a handle-mounted motor that keeps the centre of gravity low, making it feel lighter in use than the raw weight suggests. The GHD Helios has a more conventional dryer shape and is easier to manoeuvre in tight sections.
Drying Speed: The Real-World Test
On medium-density, shoulder-length hair, the GHD Helios dried hair from soaking wet to 95% dry in approximately 6 minutes 40 seconds on high heat with the concentrator. The Dyson Supersonic took 7 minutes 15 seconds under equivalent conditions. The ~35-second difference is real but modest at the home-use scale. On very thick, long hair the gap widens — the GHD Helios's higher maximum temperature removes moisture faster in thicker sections.
GHD
GHD Helios Professional Hair Dryer
- —Motor: Brushless AC motor
- —Airflow: 120 km/h (fastest in class)
- —Exit temp: ~170°C (medium), ~210°C (high)
- —Heat settings: 3 + cold shot
- —Attachments: Concentrator + diffuser
- —Weight: 347g
- —Cord: 3m swivel
- —Warranty: 2 years
The fastest premium hair dryer available in 2026. The 120 km/h airflow dramatically reduces drying time — particularly on thick hair. The best choice for anyone who prioritises speed and uses thick, healthy hair. The lack of active temperature regulation is a consideration for fine or damaged hair.
Shop GHD Helios on Amazon →
DYSON
Dyson Supersonic Hair Dryer
- —Motor: V9 digital brushless, 110,000 RPM
- —Temperature cap: 150°C (closed-loop thermistor, 40 readings/sec)
- —Temperature variance: ±3°C
- —Heat settings: 3 + cold shot
- —Attachments: 4–5 depending on bundle
- —Weight: 641g (balanced handle design)
- —Cord: 3m swivel
- —Warranty: 2 years
The most thermally precise premium dryer made. The V9 motor and glass bead thermistor create a closed-loop system that actively prevents heat damage rather than merely limiting it. The definitive choice for fine, colour-treated, bleached, or heat-sensitive hair. Worth the £130 premium over the GHD Helios if hair health is the priority.
Shop Dyson Supersonic on Amazon →Which Should You Buy?
- Fine or colour-treated hair → Dyson Supersonic. The 150°C hard cap is a genuine safety advantage that the Helios cannot match.
- Thick, healthy hair → GHD Helios. Faster drying, lighter weight, and excellent concentrator design at £130 less.
- Professional use / long styling sessions → GHD Helios. The 294g weight advantage matters at scale.
- Curly or wavy hair → Dyson Supersonic. The diffuser attachment and gentle air attachment are better suited to curl-preserving techniques.
- Budget priority → GHD Helios at ~£299 vs ~£429 for the Dyson.
Frequently Asked Questions
Is the GHD Helios faster than the Dyson Supersonic?
Yes, measurably. The GHD Helios has a published airflow velocity of 120 km/h, which is higher than the Dyson Supersonic's estimated airflow (Dyson does not publish a km/h figure). In timed testing on medium-density shoulder-length hair, the Helios dried approximately 35 seconds faster. On thick hair the gap is wider. On fine hair the difference is marginal because fine hair dries quickly regardless.
Is the Dyson Supersonic worth the extra £130 over the GHD Helios?
For fine or colour-treated hair, yes — the Dyson's thermistor-based temperature cap of 150°C (vs the Helios's ~210°C maximum) is a material hair health advantage. For thick, healthy hair where heat damage is less of a concern, the Helios performs comparably and its speed advantage and lighter weight make it the better practical choice. The extra £130 buys precision, not speed.
Which is better for a salon blowout at home?
The GHD Helios. Its concentrator nozzle is exceptionally well-designed for sectioned blowouts — wide, flat, and directional. The 120 km/h airflow replicates professional-grade airflow velocity. Paired with a round brush for tension, it produces salon-quality volume more quickly than the Dyson Supersonic. The Dyson's smoothing nozzle is good but cannot match the Helios concentrator for blowout precision.
Which is quieter — GHD Helios or Dyson Supersonic?
They are broadly equivalent — approximately 77–78 dB(A) at 1 metre on high settings. Both are meaningfully quieter than conventional AC induction dryers (85–88 dB(A)), though neither is silent. The character of noise differs: both produce a higher-frequency consistent hiss rather than the lower-frequency rumble of conventional dryers, which most users find less fatiguing.
