Choose from 80% thermal efficiency models that range from 98,000-399,900 Btu/h and have maximum temperature setting of 180°F (82.2° C).

Space Saver Design: the short heights and narrow jacket diameters, plus the top, front, and rear water inlets/outlets offer the ultimate in installation flexibility 

System Sentinal LED Diagnostic System: our exclusive diagnostic system, with glowing LED lights, verifies system operation sequence by sequence.

Patented Technology: Universal's proprietary steel formulation, patented multi-flue design, combined with two coats of porcelain enamel, results in a superior heat exchanger design.

Stainless Steel Burners: precision burners, raised port design, are formed from high chromium stainless steel. Each burner assembly slides out like a drawer for quick inspection and maintenance. 

AGA/ASME Rated T&P Valve: factory installed relief valve. 

Insulation: sag and moisture proof fiberglass insulation surrounds the storage tank and heavy mineral wool insulation surrounds the combusion chamber.

Hand-hold Cleanout: for easy removal of lime/sediment deposits.

Low Profile Automatic Flue Damper: low profile damper minimizes overall product height. 

Heavy duty vent hood supports are designed to withstand the rigors of installation.

Full-port, Full-flow Drain Valve: factory installed brass drain valve allows for faster draining and servicing.

Direct Spark-to-Pilot Ignition System: energy saving ignition tha ignites pilot only when there is a call for heat.

Altitude Certifications: up to 5,000 feet for natural gas and 2,000 feet for LP; with high altitude certification kit, up to 8,000 feet.

Patented Anode Rods: anode design utilizes multiple resistance for a long tank life.

Manual Reset High Limit: ASME models are factory equipped with manual reset high limit to meet the code requirements in many states.

Gas Control System: thermostat adjusts from 100°F to 180°F (37.8°C to 82.2°C), 24 volt combination gas valve includes main gas pressure regulation, on-off manual valve, 220/24 volt transformer and high limit temperature cut-out.