The condensing technology within the K26i delivers up to 107% gross thermal efficiency, which translates to significant energy savings when compared to their conventional counterparts. • Energy efficient - K26i 107% net efficiency* • Saves space, water and energy • Limitless applications • Compact design with internal and weather-proof external models • Temperature accurate hot water delivery Rinnai’s unique condensing technology incorporates two heat exchangers to achieve optimum water heating generated from every cubic metre of Natural Gas or LPG. These compact wall mounted water heaters capture residual heat from its flue gases and transfer it into the water being heated. The K26i also incorporates multiple safety features ensuring temperature accurate hot water delivery and eliminating scalding.