RH Logic 400 Ergonomic Chair for Taller Users and Long-Hour Comfort

If you’re spending long hours at your desk and struggling with back tension or poor posture, the RH Logic 400 is designed to keep you supported, upright and comfortable all day.

Created for users over 162 cm (5 ft 4 in), the Logic 400 features a high backrest and advanced adjustability to provide the right support exactly where it’s needed. Its dynamic tilt mechanism responds to your movements, maintaining lower back support whether you’re focused and upright or leaning back mid-call.

Built for performance, comfort and compliance, it’s one of the UK’s most respected ergonomic task chairs.

Key features

• High backrest: designed to support the full upper back and shoulders

• Dynamic tilt mechanism: moves with you to reduce fatigue and improve circulation

• Seat depth and height adjustment: for personalised comfort and support

• Inflatable lumbar support: fine-tune the lower-back fit to your exact needs

• Fully adjustable: independent controls for seat height, depth, back height and tilt angle

• Durable build: supplied with a graphite aluminium base and Gaja fabric as standard

• Warranty: 10 years under standard use, or 5 years when used 24/7 (e.g. in control rooms)

Is this chair right for you?

You’ll benefit from the RH Logic 400 if you:

• ✅ Are 5 ft 4 in (162 cm) or taller and need high-back, posture-based support

• ✅ Sit for extended periods and want a chair that encourages movement, not slouching

• ✅ Need a DSE-compliant chair for home or professional use

• ✅ Want precise, adjustable ergonomics with a proven track record in UK workplaces

Customisation options

• Neckrest: add adjustable head and neck support

• Armrests: fully adjustable 3D and 4D armrests available

• Castors: choose for carpet or hard floors

• Fabrics: wide selection including recycled, antimicrobial, wool mix and faux leather

• Seat/back pads: exchangeable for easier maintenance and extended lifespan

• Specialist cushions available: coccyx relief seat, memory foam seat pad, XL seat upgrade

Key specifications

• Backrest height: 65–72.5 cm

• Backrest width: 44 cm

• Seat depth: 40–50 cm

• Seat width: 44 cm

• Seat height from floor: 54–53 cm (higher gas lifts available)

• Adjustable lumbar support: Yes

• Optional neckrest: Available

• Choice of armrests: 3D and 4D available

• Weight limit: Up to 23.5 stone (149 kg)

FAQs

Is the RH Logic 400 suitable for taller users?
Yes — the 400 is designed for users over 162 cm, with a tall backrest that supports the upper back and shoulders. For shorter users, we recommend the RH Logic 300.

Is this a good choice for full-time desk work?
Absolutely. The RH Logic 400 is built for long-hour use and helps reduce discomfort and fatigue over time.

Can I add features like a neckrest or different arms later?
Yes — all key accessories can be added at the point of order or retrofitted later.

Does it come assembled?
Chairs are typically delivered partially assembled for shipping safety but are quick to set up and adjust on arrival.

Call to action

Support your body, protect your posture and stay focused through every hour.
Order your RH Logic 400 today or contact us for advice on custom options.

Looking for more options?

• For extra pressure relief and cushioning, try the [RH Logic 400 Comfort]

• For 24/7 control room use, see the [RH Logic 400 Elite]

• For static-sensitive work environments, explore the [RH Logic 400 ESD]