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Condensing Technology

To help explain "condensing technology," imagine the condensation on a glass of ice water. This condensation is created inside Navien's condensing heat exchanger (secondary heat exchanger) from the incoming cold water cooling the hot gases inside the unit. Navien's state-of-the-art, stainless-steel condensing heat exchanger then traps this condensation and uses it, making the whole process incredibly efficient and economical.

This condensation (or vapors and gases) would normally escape through the vents in a conventional tankless water heater. But with Navien's cutting-edge technology, our Water Heaters reuse the condensation, providing you with the most efficient and economical Water Heater on the market today.

Navien Condensing Tankless vs Conventional Tankless

Money Saving
Water Heater

Navien’s stainless steel
Condensing Heat Exchanger
recovers heat from water
vapor in the flue gas

Primary
Heat Exchanger
(Stainless steel)
Condensing
Heat Exchanger
(Stainless steel)

Hot exhaust gas is recycled through the condensing
heat exchanger, saving energy and money.

Navien Condensing Tankless

Primary
Heat Exchanger
(Copper)

Hot exhaust gas is flown away,
wasting energy and money.

Conventional Tankless

Feel the vent temperature!
Navien Condensing Tankless has a vent temperature low enough to be touched with hand thanks to the low exhaust gas temperature.