The chairs at the conference table are Nimitz Aluminum Side Chairs:
http://www.inmod.com/alphaville-nimitz-aluminum-side-chair.html
The two wooden chairs are Eames LCM Molded Plywood Lounge Chairs:
http://www.hermanmillerseating.com/Herman-Miller%AE-LCM-HML1140.html
The comfortable sitting chair in his office is a Eames Lounge Chair:
http://www.hermanmiller.com/Products/Eames-Lounge-Chair-and-Ottoman
The office chair behind the desk is a Herman Miller Aeron PostureFit:
http://www.hermanmiller.com/Products/Aeron-Chairs
There are many online shops that sell office chair parts. Bestbuy.com is one of online shop that sells office chair parts with any kind of models. You can visit www.bestbuy.com.
The best advice is to take standing breaks office to keep from hurting your posture. In addition one needs a chair that will reduce back pain and also have comfort.
There are two kind of office chairs, one is regular office chairs, another one is office task chair, but they are no difference.
In my experience, the office chair is not as important as the support that you have while sitting. Rather than focus on the chair, I recommend using this contoured back pillow at the following web address: http://www.amazon.com/Lumbar-Pillow-prevents-removable-polyurethane/dp/B000VZSY7U
High back office chairs are a great addition to any office. These types of chairs can be found at Staples and Office Max. Large discount department stores will also offer this type of chair.
Realspace's West Central Mid-Back Mesh Office Chair utilizes mesh fabric to promote air circulation to stay cool and productive longer. Tilt controls are available to lock the chair into 3 different positions for maximum comfort and to vary the position of your body, which will help alleviate numbness.
A beach chair.
an adjustable chair can be raised and lowered.
Nike Shox, not sure of the make probably the R4. But he has a few different sets.
To find out what kind of caster wheels you need for your chair at home is to look at the chair and see what kind of wheels it has. Go to retail store like Canadian tire and purchase those wheels to replace it on your chair.
Yes. You can do a search on amazon to find a variety of replacement seats. You can also go to the website of the maker of the seat that you have to see what kind of replacement parts the company offers specifically for your chair.
Purchase a desk chair that is comfortable, is in a style that you like as well as being ergonomically correct for your health's sake. Here's a site that sells them: http://www.sitcorrect.com/ and here's some reviews for you: http://www.ergonomicdeskchairguide.com/