NEXT Hybrid® Gas
NEXT Hybrid® is the new milestone in water heating — built for the way people ACTUALLY live and use hot water. The product combines the best features of tankless and conventional technologies to create a new category of water heating.

Vertex Power Vent
Through an inspired blend of innovation, efficiency and years of industry expertise, A. O. Smith has created a family of state-of-the-art products that provide a long-lasting supply of hot water during those times when everyone in your home needs it most. Vertex™ power-vent and power direct-vent gas water heaters take high-demand homes to the pinnacle of hot water availability.

Vertex Power Direct Vent
Vertex offers up to 96% thermal efficiency with performance that rivals much larger water heaters. With its fully-condensing design, Vertex delivers “continuous hot water” — shower after shower, hour after hour. Yet it’s easy to install, with dimensions and installation requirements comparable to standard power-vent and power direct-vent units.

Effex®
Exclusive and patented pressurized combustion chamber with an advanced air intake blower delivers superior efficiency. Much like a turbo charger, the blower distributes an optimum air-to-gas mixture pushing exhaust gases through the highly restricted flue baffle. The end result is the most efficient atmospheric gas product on the market with a .70 Energy Factor (EF).

Conservationist®
If you need maximum energy savings and reliability, choose our top of the line Conservationist®. Its DynaClean™ II system is your safeguard against lime and sediment buildup. And its Blue Diamond® glass coating delivers more than twice the corrosion resistance of industry standard glass lining.

Energy Saver
Our Energy Saver models meet all of today’s governmental requirements for manufactured housing installation. They’re available in either standard vent or direct vent, with your choice of natural gas or propane operation.

ProMax® Plus High Recovery
Great for big families and high-demand applications, the ProMax® Plus High Recovery model delivers hot water up to 150 gallons in the first hour.

ProMax® Plus High Efficiency
The ProMax® Plus High Efficiency line can help reduce homeowner energy bills and also qualifies for most gas utility rebate programs, Energy Star Home Program recommendations and California Title 24 requirements.

ProMax®
ProMax® is an economical water heater designed for households that need an exceptional performer and provides long-lasting value. Patented “Eco-Friendly” design reduces NOx emissions by up to 33% and complies with less than 40 ng/j requirements for low NOx.

ProMax® Ultra-Low NOx
Featuring the Ultra-Low NOx Burner System, these water heaters help to reduce NOx emissions by 10-15% and decrease NOx emissions by up to four times.

ProMax® Direct Vent
ProMax® Direct Vent models install easier in more places, with a one-pipe dal-channel closed system that draws all made-up air from outside of the home, eliminating issues caused by insufficient indoor ventilation.

ProMax® Power Vent
The ProMax® Power Vent 40 and 50-gallon residential gas water heaters are equipped with A. O. Smith's patented C3 Technology(r) design and they meet Phase II of the ANSI Z21.10.1 standards for flammable vapor ignition resistance.

ProMax® Power Direct Vent
ProMax® Closed Combustion Power Direct-Vent Gas Water Heaters offer horizontal and vertical venting options (up to 45 feet) using installer-friendly plastic material.

ProMax® Side Loop
Side Loop units are used for installation with combination space heating/potable water heating applications (ie:, Heat Exchanger) or any system requiring a recirculating hot water loop.

ProMax® Side Loop Power Vent
ProMax® Side Loop Power Vent models will vent using installer-friendly plastic material and also feature an advanced Intelli-Vent(tm) gas control valve with rugged silicon nitride hot surface igniter.

ProMax® Side Loop Direct Vent
Offering a closed combustion dual-channel vent system, the Side Loop Direct Vent models draw combustion air from the outside and vent to the outside of the home.

ProMax® Side Loop Power Direct Vent
Offering greater reliability and more venting options, these models vent up to 45 equivalent feet with installer friendly plastic material and also feature an advanced Intelli-vent™ gas control valve with rugged silicon nitride hot surface igniter.

A.O. Smith Tankless Water Heaters