The HEET 199 pairs a 10:1 turndown gas valve with continuous electronic combustion monitoring, so it sips gas at low demand and never misses a shower at full tilt. Its control interface is shared across the entire Eco-King family, so installers learn it once.
Eco-King Heet 199 boasts 97.5% efficiency, with a unique single pass stainless-steel heat exchanger. The exchanger has wide passageways for durability, superior water heating and corrosion resistance. The HEET has an easy-to-use control that spans the entire Eco-King product family from residential to commercial.
10:1 turndown ratio with electronically controlled continuous combustion monitoring for clean efficient combustion. All models are natural gas fired and field convertible to propane.
Two vent connector with analyzer test ports. It is rated for combined vent lengths up to 150 ft.
Register online to activate full coverage. Two minutes per unit.

My initial experience with the HEET 199 is very positive, just like all the other Eco-King products I have installed and used!