This Office Hippo high back office chair delivers professional-grade comfort for extended work sessions. Built to BS5459 safety standards, it supports up to 152kg and carries certification for 24-hour daily use.
The asynchro mechanism allows independent adjustment of seat and backrest positions. You can tilt the seat forward for active working or recline the back whilst keeping the seat level. Height and width adjustable arms accommodate different body types and desk heights.
Thick moulded foam cushioning covers both seat and backrest for lasting comfort. The torsion control knob lets you match tilt tension to your body weight. Powder-coated metal construction ensures durability through heavy daily use.
The asynchro mechanism lets you adjust the seat and backrest independently. You can raise or lower the backrest height whilst keeping the seat position unchanged. The seat tilts forward for active working or backwards for relaxation, completely separate from the backrest angle. This gives you much more positioning flexibility than basic office chairs where the seat and back move together.
The chair supports up to 152kg and carries BS5459 certification for this weight capacity. The heavy-duty metal frame and reinforced gas cylinder handle this load during normal use and adjustment. Customer reviews confirm the chair remains stable and functional even with users approaching the maximum weight limit during extended daily use.
Yes, it carries specific certification for 24-hour daily use under BS5459 standards. This means the chair can handle continuous operation in call centres, control rooms, or other shift-based workplaces. The robust mechanism and heavy-duty components resist wear from constant adjustment and movement that would damage standard office chairs.
The arms adjust both in height and width to fit different body sizes and desk setups. Height adjustment covers approximately 10cm range whilst width adjustment moves the arms inward or outward by several centimetres. This dual adjustment helps position your arms correctly whether you're typing, using a mouse, or resting during calls.
The main differences are the 24-hour certification, 152kg weight capacity and independent seat/back adjustment. Cheaper chairs typically support less weight, lack certification for extended use and have basic mechanisms where seat and back move together. The heavy-duty construction and five-year component warranty also distinguish it from budget alternatives.
Assembly takes 30-45 minutes using the included instructions and basic tools. Some customers mention the chair is heavy, particularly the seat mechanism, so having someone help with lifting is useful. The weight reflects quality construction rather than poor design. All necessary hardware comes included and the process is straightforward following the step-by-step guide.
Forward tilt encourages active sitting which can strengthen core muscles and improve posture. When the seat tilts slightly forward, it naturally positions your pelvis correctly and reduces slouching. This feature is particularly useful for tasks requiring concentration or when you want to engage your core muscles rather than relying entirely on back support.
The warranty covers mechanical components for five years and fabric for two years. This includes the gas cylinder, tilt mechanism, adjustment controls and frame. Normal wear items like wheels and surface scratches aren't covered, but mechanical failures during normal use are replaced. The extended warranty period reflects confidence in the construction quality.
| Brand | Office Hippo |
| Model Number | OH0509BK |
| Colour | Black |
| Material | Metal/Foam |
| Weight | 9.6 kg |
| Weight Capacity | 152 kg |
| Overall Dimensions | 71 x 64 x 95 cm |
| Seat Height Range | 43.5 to 52 cm |
| Seat Width | 48 cm |
| Seat Depth | 46 cm |
| Backrest Height | 54 cm |
| Backrest Width | 43 cm |
| Daily Use Rating | 24 hours |
| Safety Standard | BS5459 (2000) part 2 |
| Mechanism Type | Asynchro |
| Arm Adjustment | Height and Width |
| Seat Tilt | Yes |
| Back Tilt | Yes |
| Torsion Control | Yes |
| Finish Type | Powder Coated |
| Base Type | 5-Star Wheeled |
| Surface Recommendation | Carpet, Hard Floor |
| Assembly Required | Yes |
| Warranty Components | 5 years |
| Warranty Fabric | 2 years |
| Country of Manufacture | Taiwan |
| GTIN | 05056073738086 |
| Care Instructions | Wipe Clean |
| Indoor/Outdoor Use | Indoor |
| Age Range | Adult, Teen |
| Room Type | Office |