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Quick answer: the three things that matter most in a steam iron are continuous steam output (aim for 45g/min or more), a good soleplate (ceramic at minimum, Durilium or SteamGlide ideally) and an anti-scale system if you live in a hard-water area. Wattage matters less than most people think.
| Spec | Occasional ironing | Family ironing | Heavy ironing |
|---|---|---|---|
| Continuous steam | 25–35g/min | 45–55g/min | 60g/min+ (or a steam generator) |
| Steam shot | 100–150g | 180–220g | 250g+ |
| Tank | 200–250ml | 300–350ml | 350ml+ |
| Power | 2000–2400W | 2600–2800W | 3000W+ |
1. Continuous steam (g/min)
The single most important figure. More steam relaxes fibres faster, so you need fewer passes. It matters more than wattage.
2. Steam shot or boost
A burst of steam for stubborn creases, jeans and linen. 180g or more is good.
3. Soleplate
Stainless steel is durable but grips more. Ceramic glides well and is cheap. Premium coatings such as Tefal Durilium, Philips SteamGlide Elite, Braun FreeGlide 3D and Rowenta Microsteam glide best and resist scratches. A precision tip helps around buttons and collars.
4. Anti-scale system
Most of England has hard water. Choose a removable scale collector (Tefal), a calc-release system (Philips) or self-clean (Russell Hobbs, Morphy Richards), and use it regularly. It is the biggest factor in how long an iron lasts.
5. Wattage
Higher wattage heats faster and recovers heat quicker during steaming. 2400–3100W is typical. Don’t pay extra for wattage alone.
6. Water tank
300ml or more means fewer refills. A wide filler hole and a clear tank help.
7. Weight
Heavier irons (1.5kg+) press creases out with less effort, while lighter ones (about 1kg) are easier on wrists. The Beldray Precision 1 (1.09kg) is a strong lightweight option.
8. Safety
Auto shut-off (after about 8 minutes upright or 30 seconds flat) and anti-drip are worth having.
9. Cord
2.5–3m gives flexibility, and a 360° swivel stops tangling. Or go cordless.
Our recommendations
See the best steam irons UK for our current picks, or steam generator irons if you iron a lot. Not sure which type? Read steam generator vs steam iron.
Frequently asked questions
What should I look for when buying a steam iron?
Continuous steam of 45g/min or more, a quality soleplate, an anti-scale system, a 300ml+ tank and auto shut-off.
Is a 3000W iron better than 2400W?
It heats faster and keeps up better during heavy steaming, but steam output and soleplate quality matter more.
How long should a steam iron last?
Typically 3–7 years. Regular descaling and emptying the tank after use make the biggest difference.
Related guides
- Iron temperature settings guide
- How much an iron costs to run
- Auto shut-off explained
- Best lightweight steam irons
- Best iron for hard water
- Garment steamer vs iron
- Best steam irons UK
- Cheap vs expensive steam irons
- Tefal vs Philips
- Dry vs steam iron
Sources: manufacturer specifications; Which? steam iron buying advice; UK iron reviews from Mumsnet and Expert Reviews. How we research.
