Originally Posted by ilyaz
where to place the sink, the faucet, the disposer etc optimally so that (i) it's convenient,
1. How far back can we push the sink to the wall?
how do we figure out its optimal size?
ergonomic measurements kitchen - Google Search
Generally, garbage disposals come in 1/2, 3/4, and 1 horsepower models.
We recommend 1/2 horsepower garbage disposals for light use, 3'4 horsepower for normal home use, and 1 horse power for heavy home use or light commercial.
A 1/2 horse power garbage disposal
is perfect for condos and apartments. It has enough power for one or two people to use and it is usually less expensive. This power of garbage disposal is also great for vacation homes, where it doesn't get too much use. Just be careful, though, that if you have a large dinner party or other special occasion where you may need to dispose of a lot of food particles at one time, that you run plenty of cold water and feed the particles slowly into the disposer.
A 3/4 horse power garbage disposer
is probably the most common. This kind of garbage disposer is generally found in single family homes and is good for a family. If you have children, however, make sure that they understand what you can and cannot put down the garbage disposal. This will help prevent future problems if everyone understands how to use the disposal.
Residential disposer models are available in several sizes and capacities, and driven by motors of 1/3 hp to 1 hp.
The size of the unit and motor and the construction design are the principle factors affecting price, along with the warranty period, which tends to increase with the size and power of the unit. More expensive disposers are usually quieter, and offer extra features like auto-reversing motors. High-end units are made of stainless steel and carry a 7-year warranty. The most popular models are ½ to ¾ hp continuous feed models.