Another option is to choose a tankless water heaterto be installed in your attic.
Getting water heater into attic.
How to hoist 50 gallon water heater into attic.
This is far less expensive than your water heater leaking and causing thousands of dollars worth of water damage.
Another reason why installing a gas water heater in the attic is not a good idea is if the tank or any connection leaks.
This is called a common vent configuration.
If the builder has already installed your water heater in the attic you can get it moved to another location in the house or into the garage.
Take a close look at any plumbing and gas fittings in the vicinity of the water heater for wet spots or signs of rust and corrosion and be sure to check the outer tank for any signs of rust.
During the winter time a water heater and piping in the attic space should be insulated to protect against freezing temperatures.
Use a cargo tie down ratcheting strap around the heater 2.
Be sure to get up into your attic water heater at least twice a year to check your water heater for any sign of leaks.
In many cases the exhaust from the larger appliance heats up the common vent improving the flow of the water heater vent.
Go up into the attic and stand on the rafters not the stairs 4.
Most importantly along the seam of the tank.
Use a rope to attach to the ratchet strap 3.