While tankless water heaters have been installed as standard practice across Asia and Europe for decades, homeowners and commercial developers across North America are increasingly realizing the energy-efficient, space-saving benefits and convenience of continuous hot water.

For the tankless curious, the Tankless Buyer’s Guide is the starting place and one-stop reference about incorporating tankless technology into homes, businesses, and remodeling projects.

A tankless water heating system uses a gas- or electric-powered heat exchanger to heat water only when it’s needed, as the guide details. These compact units supply endless streams of clean hot water to multiple outlets simultaneously without any fluctuation in temperature.