Navien Npe-240a Tankless Water Heater Condensing High Efficient 200k BTU Ng/lp by admin on October 31, 2019 Navien NPE-240A 199,000 BTU Condensing PremiumGas Tankless Water Heater. Navien has been pushing the boundaries of efficiency for 25 years. The NPE-240A is a result of their dedication to providing an effective and green water […]