Navien Brand Water Heaters.

Hot water and whole-house comfort from Navien, a global leader in high-efficiency water heaters and boilers.  Whether you need an endless supply of hot water, efficient home heating, or both, Navien has the most energy-efficient solutions.

They offer the industry's most advanced condensing tankless water heaters, condensing boilers, and the first combi-boilers strong enough to support whole-house heating and hot water for larger homes.