Pool and Spa Temperature Control

Password Security

CPVC or PVC Ready

3rd-Party Remote Compatible

Sealed Combustion Chamber

Fan-Assisted Combustion

Built-in Combustible Floor Shield

Direct-Spark Ignition

Built-in Air and Water Pressure Switches

Inlet and Outlet Temperature Sensors

Automatic Reset Hi Limit Safety

Polymer Header with Built-in Bypass

Low-NOx Emissions Meet the Most Stringent Standards

Flame View Port

Outdoor Venting

3-Year Limited Warranty on Heat Exchanger

2-Year Limited Warranty on Parts

Stainless Steel Burners

Loch-Heat Ceramic Tile

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

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

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

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

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

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