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

Fire tube stainless steel heat exchanger

Integrated precision control

Advanced multi-zone capacity

Set-up wizard for easy install

Floor standing and wall-hung capable

Setup wizard efficiently guides the installer through a single or multiple boiler installation in minutes

For the contractor, installer and/or service provider, the Evergreen has an easy to understand graphical user Interface and makes programming and monitoring operations simple

Wiring diagrams provided are clear and easily accessible

Interactive diagnostic capability

Reliable operation

Easy to understand and monitor controls

Effortless heating and comfort in all zones

Large, accessible panels for quick and easy maintenance checks

Interactive diagnostic capability provides a snapshot of the past and current operation parameters

Reliable operation of the complete heating system including radiant elements

Ease of Installation, Ease of Use and Maintenance

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

Up to 93.9% Thermal Efficiency

Up to 94.7% Combustion Efficiency

Modulating Burner with 5:1 Turndown Ratio

Fast and Easy Out of the Box Installation

Lightweight, Compact Design Requires Minimal Clearance

Low Nox Certified < 20 PPM

CSD-1 Compliant is Standard Feature

Approved for Common Venting

PVC, CPVC, PP or SS (AL29-4C) Materials Approved for Direct Vent and Direct Exhaust

Fully Customizable Outdoor Reset Curve

Lead/Lag Capability up to 8 Boilers with Lead Boiler Rotation

Remote Connection Using Standard Modbus or Optional BACNET/Lonworks

High limit temperature control with maximum 200 degree F manual reset

Sectional Aluminum Block

Stainless Steel Burner with Woven steel fiber mesh

Compact Design and Lightweight

Completely Wired, Programmed, Tested and Factory Assembled

Controls Set Up Wizard

Minimal Clearance Requirements

Efficiency Above 94%

Intuitive Interface

Advanced Boiler Controls

Non-Metallic (Composite) Heat Exchanger Base

3.5 Inch LCD Screen

Intuitive, color coded display

Express set up or fully customizable options

Preset typical heating systems

0 to 10 VDC analog output signal to modulate a lag boiler in a hybrid boiler system

Up to 8 boiler cascading and lead/lag rotation

Multiple boiler operation with up to 24 circulators

Zone Stacking-zone and priority options for up to 24 programmable zones

Smart Sequencing

Alarms and advanced diagnostics

High limit and modulating temperature control

Boiler staging algorithm optimized for variable primary only systems

Outdoor temperature reset and warm weather shutdown

Boiler schedule and contractor information

Low water protection

High temperature limit with manual reset

Ignition control

Multiple inputs with assignable priority

Up to 93.9% Thermal Efficiency

Up to 94.7% Combustion Efficiency

550000 to 750000 BTU/HR

Modulating Burner with 5:1 Turndown Ratio

Fast and Easy Out of the Box Installation

Lightweight, Compact Design Requires Minimal Clearance

Low Nox Certified < 20 PPM

CSD-1 Compliant is Standard Feature

Approved for Common Venting

PVC, CPVC, PP or SS (AL29-4C) Materials Approved for Direct Vent and Direct Exhaust

Fully Customizable Outdoor Reset Curve

Lead/Lag Capability up to 8 Boilers with Lead Boiler Rotation

Remote Connection Using Standard Modbus or Optional BACNET/Lonworks

High limit temperature control with maximum 200 degree F manual reset

Sectional Aluminum Block

Stainless Steel Burner with Woven steel fiber mesh

Compact Design and Lightweight

Completely Wired, Programmed, Tested and Factory Assembled

Controls Set Up Wizard

Minimal Clearance Requirements

Efficiency Above 94%

Intuitive Interface

Advanced Boiler Controls

Non-Metallic (Composite) Heat Exchanger Base

3.5 Inch LCD Screen

Intuitive, color coded display

Express set up or fully customizable options

Preset typical heating systems

0 to 10 VDC analog output signal to modulate a lag boiler in a hybrid boiler system

Up to 8 boiler cascading and lead/lag rotation

Multiple boiler operation with up to 24 circulators

Zone Stacking-zone and priority options for up to 24 programmable zones

Smart Sequencing

Alarms and advanced diagnostics

High limit and modulating temperature control

Boiler staging algorithm optimized for variable primary only systems

Outdoor temperature reset and warm weather shutdown

Boiler schedule and contractor information

Low water protection

High temperature limit with manual reset

Ignition control

Multiple inputs with assignable priority

ASME Construction

2-Line, 16-Character Digital Display

Password Security

Sealed Combustion Chamber

Fan-Assisted Combustion

Built-in Combustible Floor Shield

Loch-Heat Ceramic Tile

On/Off Switch

Built-in Air and Water Pressure Switches

Inlet and Outlet Temperature Sensors

Automatic Reset Hi Limit Safety

Polymer Header with Built-in Bypass

Flame View Port

Outdoor Venting