Navien NPE-240S2-NG Tankless Condensing Water Heater – 199,000 BTU & Max 11.1 GPM

The Navien NPE-240S2-NG is a top-performing 199,000 BTU condensing tankless water heater engineered to deliver powerful, continuous hot water for larger homes and high-demand applications. With flow rates up to 11.1 GPM, this ultra-efficient unit easily supports multiple fixtures running simultaneously while maintaining consistent temperature output.

Built with stainless steel heat exchangers for long-lasting durability, the NPE-240S2-NG offers flexible installation options, including 2" Schedule 40 PVC venting up to 75 ft and ½" gas line capability for simplified retrofits. Its compact, wall-mounted design frees up space while providing industry-leading efficiency and reliability.

Key Features

• 199,000 BTU high-efficiency condensing performance

• Up to 11.1 GPM for multi-fixture residential demand

• Stainless steel heat exchangers for longevity

• 1/2" gas line capable up to 24 ft

• 2" PVC venting up to 75' for easy, low-cost installs

• Low NOx emissions (20 ppm)

• Indoor or outdoor installation

• Endless hot water with a true tankless design

A proven, dependable choice for remodels, new construction, and tank-to-tankless upgrades—ideal for plumbers and homeowners needing strong performance and long-term efficiency.

At Apex Supply Company, we offer local pickup, local delivery, and nationwide shipping.