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2. The best stair lift for 2025: Chair lifts that make ... - AOL

   www.aol.com/lifestyle/best-stair-lift-134610076.html

   "Prices tend to range from $3,800 to $6,500 for a straight stair lift. Custom curved stair lifts [can] range from $11,000 to $19,800, while outdoor stair lifts generally cost between $4,900 and ...

3. Stair lift - Wikipedia

   en.wikipedia.org/wiki/Stair_lift

   Specifying a curved-rail stair lifts usually involves careful measurement, design and manufacturing, and the installation process usually takes longer than for a straight domestic stair lift, usually between 5 – 10 weeks. One manufacturer, Acorn, can provide a curved-rail stair lift made from modular parts.

4. Miles per gallon gasoline equivalent - Wikipedia

   en.wikipedia.org/wiki/Miles_per_gallon_gasoline...

   The miles per gallon equivalent cost of an alternative fuel vehicle can be calculated by a simple formula to directly compare the MPG operating costs (rather than the energy consumption of MPGe [7]) with traditional vehicles since the cost of resources varies substantially from region to region. [5] [4] For reference, the complete equation is:

5. Cost of electricity by source - Wikipedia

   en.wikipedia.org/wiki/Cost_of_electricity_by_source

   The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...

6. Benefit–cost ratio - Wikipedia

   en.wikipedia.org/wiki/Benefit–cost_ratio

   A benefit–cost ratio [1] (BCR) is an indicator, used in cost–benefit analysis, that attempts to summarize the overall value for money of a project or proposal. A BCR is the ratio of the benefits of a project or proposal, expressed in monetary terms, relative to its costs, also expressed in monetary terms.

7. Home lift - Wikipedia

   en.wikipedia.org/wiki/Home_lift

   Often, maintenance costs are also lower than a more conventional lift. The driving system for a home lift can be built inside the lift structure itself and features a screw , an electric motor , and a nut mounted behind the control panel of the lift's platform; it is thus referred to as a "screw and nut" system.