4.2 GPM Natural Gas Tankless Water Heater Whole House 120K BTU 98% High Capacity

Endless hot water for larger households. The CZ422NG Natural Gas Tankless Water Heater delivers 4.2 GPM and 120,000 BTU—enough for 3-4 fixtures simultaneously. Never run out of hot water during back-to-back showers. ±1°F precision eliminates sudden temperature swings. Oxygen-free copper heat exchanger achieves 98% thermal efficiency, saving up to 30% on energy costs versus traditional tanks. Built with 8 safety protections including freeze protection, flame failure, and overheat shutdown. DC high-speed fan withstands hurricane-force winds up to 111 mph—no flameouts in storms. Smart 3.5" LED touchscreen shows real-time diagnostics. Ultra-quiet operation (<45 dB). Compact size fits in tight spaces. Standard 3/4" NPT water connections and 1/2" NPT gas inlet for easy installation. UL certified.