VEVOR Commercial Ice Maker, 400LBS/24H Ice Making Machine with 330.7LBS Large Storage Bin, 800W Auto Self-Cleaning Ice Maker Machine with 3.5-inch LED Screen for Business Bar

This depends on your requirements. Generally, you can clean the filter once every three months. If you have requirements for water quality and ice cubes, you can also replace the filter regularly.

The ice machine normally flows water downwards and there will be no backflow.

It is air cooled.

The dimensions are 22mmx22mmx22mm, and they are square.

If there is a power supply, there is a water inlet pipe for water intake, and a drain pipe for drainage, if these conditions are met, it is also OK to place it outside the porch.