About Navien® Boilers

Innovations make Navien® condensing combi-boilers the best choice for homeowners. The only compact combi-boiler strong enough to support DHW and heating for the whole house.
Protect the environment as you add value
Navien primary condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing tankless heaters to reduce energy consumption and CO2 emissions. That keeps exhaust temperatures very low – so low that economical Schedule 40 PVC pipe can be used for venting in almost all applications.


  • The highest energy efficiency in the industry-up to 95.0% AFUE
  • Energy Star certified
  • Backed by the industry’s strongest warranty-10 years on heat exchangers
  • Takes about 80% less space than floor standing boiler and tank water heater
  • Can be cascaded with Navien NPE water heater for extraordinarily large demand
  • Easy to use control panel
  • Elegant, clean appearance
  • Ideal for replacements or new construction