Do I need to connect a garden hose or some sort of water to the generator when running?

No, just fill up the tank when you receive your unit and it has a gage on the tank.

Any type of water can be used?

No salt water, only clean tap water.

Is there any maintenance policy?

Yes every 3 months drain water tank and spray with garden hose.

Is it noisy?

It is 50% less noise then traditional gas run generators.

I can use it in my house/place of business/store?

Yes, there are no emmissions.

What does an international warranty mean?

Your warranty will start on delivery to your house or office anywhere in the world.