Back Height Adjustment: Sound ergonomics requires that a chair have a back height adjustment system that has good range and is easy to adjust. Our NPS chairs deliver on both accounts. There are no knobs, just lift the seat back until it clicks to the desired height. If you vary your postures from a trunk upright posture to various degrees of leaning back postures, you will find that the ideal point for lumbar support actually changes the further you lean, requiring a slight lowering of the seat back. That makes the no knob adjustment even more useful.
Chair Arm Height Control: A full 4" of adjustment means we take care of about 95% of all workers in a typical population (based on height). Chair makers that provide 3" or less of arm height adjustment are not only ignoring basic ergonomics, they are ignoring more than 20% or more of a typical population.
Control Arm Locations: Notice that all our controls are conveniently located very close to the chair seat pan, indicative of sound ergonomics...And the controls on our chairs that require any degree of exertion are engineered for downward activation instead of difficult or awkward exertions. Watch out for chairs that require your having arms as long and strong as a gorilla.
Seat Height, Seat Angle & Back Angle: We believe that separate seat angle and back angle adjustments are ergonomically superior for people who work for long periods in the seated posture. A recent fad in chair mechanism design is the "synchronous" platform. It suits some folks just fine, but others are frustrated by a mechanism that has a set of programmed angles and a predetermined relationship between the seat pan that never allows the occupant to sit in any of the postures that he or she prefers.
The NPS 500, 600, and 700* seat pans accommodate approximately the 2.5th to 97.5th** percentile Americans in terms of height. See the graph on the Seat/Cylinder Matrix page to determine if you require the 300 or 800 seat. These seat pans ensure comfortable seating for most of those whose stature places them outside of the middle 95%.
* We do not recommend purchasing the 700 seat pan without first testing it. The deep contours of the 700 fit many people like a glove; others strongly prefer the 500 or 600. Find a local dealer or retail outlet and test the chair if you think you want a 700 seat pan. Chances are you will fall in love with it. If you try it and like it, please buy the chair from the person and organization who provided you the evaluation chair and their time. If you plan to purchase additional NPS chairs in the future, we would ask that you check our pricing and consider purchasing with us.
** Approximate and based on height measurement and not weight measurements.