【Efficient & Energey Saving】-The 3.18 GPM Instant Natural Gas Water Heater，on-demand hot water for 2-3 points simultaneous water supply for bathroom,kitchen hot water demand，Natural Gas ...

Uniform Energy Factor refers to a water heater's efficiency when run under simulated heavy use conditions for a 24-hour period. Gas Tankless is part of the Water Heaters test program at Consumer ...