How long does it take to install a 40-gallon hot water heater? The installation of a 40-gallon hot water heater typically takes two to three hours for an experienced professional. Is a 40-gallon ...

Tankless models heat water on demand, so everyone can enjoy their hot showers without fear ... Relying on a professional ...

And you may also get a tax deduction for installing one. Solar water heaters work by using the sun's energy to either directly heat water that can then be used in the house for hot-water needs ...