You can find information on stair lifts by contacting a company that specializes in stair lifts and asking them questions directly. You can also find a company that installs stair lifts near you and visit their website to find detailed information on things such as the cost, installation process and how it works.
Several websites have information on stair lifts: http://www.usmedicalsupplies.com/Stair-Lifts.htm or http://www.ameriglide.com/ or http://jamesonmedical.com/ should be helpful.
You can find out more information on stair lifts at several sites. These sites include www.acornstairlifts.com, www.savaris.com and www.terrylifts.com.
These websites - www.livingfreehomestairlifts.com/Stair and www.ameriglide.com/Stair-Lifts - offer a range of stair chair lifts at an affordable cost.
Ameriglide stair lifts are most often purchased directly from the manufacturer, however other medical home help websites such as US Medical Supplies and Medical Supplies also sell the stair lifts. If you're located in Canada or the US Silver Cross Stair Lifts offers multiple brands of stair lifts. You can easily find them on Google.
You can get information here: http://www.stair-lift-review.com/
You can go to the following website to find a lot of reviews on different chair stair lifts to make your residents feel safer http://www.epinions.com/pr-Online_Stores_Services-Stair-LIft
Many websites online offer used stair lifts. You could try to win one at ebay or purchase a used one through Amazon. I was also able to find a website that specialized solely in used stair lifts: http://usedstairlift.org/
A place called AcornStairlifts.com have stair lifts which are very affordable. They also have different types to choose from like straight or curved.
Stair glides, also called stair lifts, are becoming more and more popular with our aging population and the loss of mobility suffered by older people. The lift you will need will of course depend on the type and staircase you have. A good place to start, to get an overview of the variables and what's available, would be: http://www.silvercross.com/stairlifts.html
If you go to most company sites that make wheelchair lifts, you'll find specifications and/or contact information to answer your questions. http://www.innovativelifts.com/wheelchair_lifts That's a link to a site with a pretty wide variety of styles of lifts for you. They also have very accessible customer service.
There are several locations that sell wheel chair stairlifts. You can use a search engine to find the nearest wheelchair stair lift provider in your area.