You can tell a lot by a manufacturers warranty; if their parts are warranted for 10 years or have a lifetime warranty, this shows they are that confident in their product and construction of their chair that they are willing to take the risk of extending the warranty for multiple years. Remember when a part breaks on your office chair, that comes out of the manufacturers funds to have to replace it which is why some warranties are very limited.
Have a friend measure your back in its entirety from the top of the seat on your current office chair up to your shoulder blades to calculate how tall you will need your back rest to be. If you experience neck pain look for a chair that comes with an adjustable headrest. Again you will need to measure your back to ensure you do not pick a chair that has a back that is too high or too low, otherwise your headrest may end up turning out to be detrimental rather than helpful.
In order to avoid accidents, such as a chair collapsing or a part giving out, you should inspect your chair at least once every 6 months to make sure all parts and components of the chair are tightened. Look for defective casters/wheels, loose securing bolts, loose arms, broken mechanism, and evidence of cracks on the base of the chair from stress. If any of these parts are broken, contact your furniture dealer to see if these parts are under warranty.
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