The FTS-II: our own model, with a removable, washable seat cover.
An office chair is rarely chosen on looks alone. Below we place five models from our range side by side on the points that make the difference: the standard the chair complies with, the armrests, the mechanism, the maximum load and the lead time. All figures come from the manufacturer's specifications.
First the standard: NPR 1813 or NEN-EN 1335
Two designations keep coming up. NEN-EN 1335 is the European standard for office chairs: it sets out dimensions, adjustment ranges and safety requirements. NPR 1813 is a Dutch practice guideline that is added on top of it and translates the dimensions to the Dutch working population. Tenders and occupational health and safety services test against it.
Important to know: NPR 1813 is a guideline, not a quality mark. There is no certificate that makes a chair "NPR-certified". What a manufacturer can do is build a model in line with that guideline. In our webshop we call that an NPR version. You can read more about this in NPR 1813:2025 explained and in Buying an NPR office chair: what should you look for?.
Watch out when comparing: "complies with NPR 1813" says something about how the chair is built, not about the person sitting on it. The guideline assumes body heights of 151 to 200 cm, whereas NEN-EN 1335 goes up to 192 cm. If someone of a different height works there, or has a specific complaint, an adjustment appointment makes more sense than a standard.
Armrests: 3D or 4D
The figure before the D stands for the number of directions in which the armrest adjusts. 3D is height, width and depth. 4D adds rotation to that: the armrest swivels along, so the forearm stays supported with an angled keyboard or a sketch pad as well.
The WL87 NPR has 4D armrests. The Joyce JC1N1 and the Victor LX184 have 4D-NPR armrests that rotate 360 degrees, with a soft pad. The FTS-II and the Elize Mesh have 3D armrests; on the Elize there is a PU pad.
For someone who types all day in one fixed spot, 3D is usually enough. At a workstation where people switch between screen, paper and telephone you will notice the difference 4D makes.
The WL87 NPR: 4D armrests, a Donati D109 mechanism and a ten-year warranty.
Mechanism and seat depth
The mechanism determines how the chair moves with you. All five have a synchronised mechanism: back and seat tilt along in a fixed ratio when you lean back. The difference lies in the adjustment.
FTS-II: synchronised mechanism with weight-dependent tilt, plus an adjustable lumbar support.
WL87 NPR: Donati D109 mechanism, with ten centimetres of seat depth adjustment and a seat 50 cm wide.
Elize Mesh: synchronised mechanism with weight adjustment and a sliding seat of seven centimetres.
Joyce JC1N1: lockable synchronous mechanism with weight adjustment, adjustable in seven steps, plus seat tilt adjustment and an adjustable lumbar support.
Victor LX184: lockable synchronous mechanism with weight adjustment, seat height 43 to 58.5 cm, seat 47 by 47 cm, ten centimetres of seat depth adjustment and a backrest height of 69.5 cm.
Seat depth adjustment is the part most often overlooked. If the seat is too deep, the front edge presses into the back of the knee and people sit forward — which stops the backrest doing its work. All five models have that adjustment.
If you are looking for a chair whose back moves with you of its own accord, also take a look at the Sitland Spirit. It has the Freedom torsion point in the back: the backrest follows your movement without you adjusting anything. There the seat depth runs from 42 to 47 cm and the seat height from 42 to 52 cm.
Maximum load
The stated maximum load is not a target figure but a limit. The FTS-II and the WL87 NPR are rated at 125 kg and the Elize Mesh at 130 kg.
If someone heavier sits at a workstation, choose a model with a wider stated range and also pay attention to the gas lift and the star base. An aluminium star base, as on the FTS-II and the Victor LX184, is sturdier than plastic.
Fabric, wear resistance and maintenance
The wear resistance of upholstery is expressed in the Martindale figure: the number of rubs a fabric sample withstands in an abrasion test. Below 25,000 is light domestic use, 25,000 to 40,000 normal office use, above 40,000 intensive office use and above 100,000 suitable for 24-hour use, such as control rooms and shift work.
The Elize Mesh reaches 100,000 rubs. The Victor LX184 is upholstered in Lucia, 100% polyester, with more than 100,000 rubs. The Joyce JC1N1 has Era fabric, likewise 100% polyester with more than 100,000 rubs. If you would also like the chair in colour, Interstuhl supplies this model in its own fabric collections such as Amalfi, Chili, Fame, Field, King, Lucia, Manhattan, Medley, Royal and Synergy, and in leather; ask us for a fabric swatch.
For workstations where spills happen the FTS-II is practical: the seat cover is removable and washable, and there are ten cover colours. Can be ordered separately via chair covers for the FTS-II.
Will the chairs stand on carpet or on a hard floor? That determines the castor. The Elize Mesh has multifunctional castors for both floors. For models with castors for soft floors there is the soft castor set. On a smooth floor a floor mat protects the surface underneath.
Lead time, installation and warranty
The biggest practical difference lies in the lead time. The FTS-II, the WL87 NPR, the Elize Mesh and the Joyce JC1N1 are listed as quickly available in our webshop. The Victor LX184 is available from stock in the standard Lucia black version, usually within a few business days and assembled; all other colours and fabrics are made to order with a lead time of about six weeks and are supplied unassembled as standard. Assembled delivery is possible there on request.
The Joyce JC1N1 always arrives assembled in a protective cover, is Made in Germany and, in addition to NPR 1813, also carries Quality Office, GS, Blauer Engel and BIFMA level 3.
Warranties differ between the models: five years on the FTS-II and the Elize Mesh, a seven-year manufacturer's warranty on the Victor LX184 and ten years on the WL87 NPR and the Joyce JC1N1 — on the Joyce three years on fabric and castors.
The five side by side
The figures below come from our own product data and the manufacturer's specifications.
You will judge an office chair better within ten minutes of sitting on it than on paper. In our 1,000 m² showroom in Moordrecht the models are set up ready; a visit is by appointment, so that an adviser is there for you. If it concerns a whole department, we will draw up your space free of charge in 2D or 3D.
Is an NPR chair always better than a NEN-EN 1335 chair?
Not automatically. NEN-EN 1335 is the European standard for office chairs; NPR 1813 is added on top of it with dimensions tuned to the Dutch working population. If your occupational health and safety service or tender tests against NPR 1813, you need an NPR version. If someone works at a desk for less than a few hours a day, a NEN-EN 1335 chair is usually sufficient.
What is the difference between 3D and 4D armrests?
3D adjusts in height, width and depth. 4D also rotates along, so the forearm stays supported when you work at an angle to the screen or over paper.
Which chair can I get delivered the quickest?
The FTS-II, the WL87 NPR, the Elize Mesh and the Joyce JC1N1 are listed as quickly available in our webshop. The Se7en Victor LX184 is available from stock in Lucia black; in another colour it takes about six weeks.
Can I have a chair adjusted after delivery?
Yes. Our fitters place the furniture on site and can then set the chairs to the user straight away. For larger quantities we schedule that in with the delivery.
Adjustment range, motors, load capacity, tabletop size and controls: what to look for in an electric sit-stand desk. With the values of five series side by side.
Adjustment range, motors, load capacity, tabletop size and controls: what to look for in an electric sit-stand desk. With the values of five series side by side.
