Marey GA5PORT outdoor propane gas tankless water heater can provide up to 1.5 gal. Per minute for a perfect outdoor shower at 115°F output water temperature. It is also called water heater on demand, because it heats water only when needed, saving energy. Its compact design and light weight makes easy to carry anywhere. You will only need 2-D cell Battery for the ignition and it is naturally vented outdoors. Marey has been in the water heating business since 1955, bringing tradition and innovation together. Designed in USA and it includes a gas hose with csa approved regulator.