The lowes home depot even sell metal water heater sheds they are three sided to be placed against the house.
Can i put my water heater outside.
This is to protect it from splashed water rain insects direct sunlight and debris.
Many are installed inside a living space and tucked away in a closet.
Most regulations are fairly simply and require that water heaters be placed against an external wall of the house.
Often a water heater in a pan or not is out of mind until someone notices water in the hallway damp drywall or a buckling floor outside the water heater closet.
My first house has them outside and they work fine.
You will want to place your water heater next to an outer wall to make room for the flue.
Avoid installing it in locations that may subject it to freezing.
Check with a professional for installation if you re not comfortable.
Not sure about electrical but i doubt it would be wise to put outside.
Flexible hoses connecting the rest of the plumbing should resolve any movement concerns.
For me i put gas water heaters outside and electric water heaters inside.
In case you install it outside get a suitable enclosure.
A tankless water heater is for indoor installation only.
The location of a water heater is always a concern.
Space surrounding the unit is almost irrelevant give yourself enough room to maneuver the sucker or work on it you should be fine.
If you re venting straight up make sure to keep out the rain objects animals etc.
A modest amount of insulation is a plus.
Water heaters are often located outside the home in garages for example.