Heating perfection and long-term protection

Every Ultra boiler is hydrostatically tested to ASME standards and test fired

Backed by Weil-McLain quality and a warranty that provides peace of mind

Unrivaled technical and field sales support

From North America's leading boiler manufacturer with over 135 years of proud history

Designed to operate in low temperature condensing applications

Outdoor reset and domestic hot water priority

Modulates with 5:1 turn-down ratio

High grade stainless steel burner features quiet operation

U-Control gives you the power for easy set-up and maintenance

Back-lit LCD display and simple programming buttons make entering and receiving information easy

Energy Star® Rated

INTEGRATED RECIRCULATION PUMP The integrated recirculation pump will simplify installation as you will not need to spend time and money sourcing and installing the pump and controls

The front panel controls make it simply to set your recirculation pump operation so you now that you will have hot water at your faucet

DUAL HEAT EXCHANGER The primary heat exchanger is constructed of commercial-grade copper, which is stronger than standard copper and more resilient against erosion

Condensing models feature 316L stainless steel secondary heat exchanger, providing additional protection against corrosion

SAFETY FEATURES Includes freeze, overheat, surge protection and troubleshooting diagnostic codes

ENDLESS HOT WATER The comprehensive line of State tankless water heaters are an excellent whole-home water heating solution that supply endless hot water

Energy Star® Rated

Lead-Free

Microprocessor-based control designed to regulate the supply water temperature of a single boiler, based on the outdoor temperature

The FuelMizer is a boiler reset control and switching relay in one unit

it is ideal for retrofit application, but may also be used in new installations. Its quality features include full outdoor boiler reset control: it can control the system or zone valve circulator or it can override outdoor reset when DHW tank is calling. Its easy to install and set and will not affect the boilers warranty. Front mounted LED lights offer full diagnostic information

The FuelMizers typical energy savings is about 14%, with some customers experiencing 30%