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Primary Heat Exchanger is Constructed of Commercial-Grade Copper that is More Resilient to Erosion and is 25X Better at Heat Transfer than Stainless Steel Thus Stabilizing Outgoing Water Temperatures Quicker
Secondary Heat Exchanger is Made of Type 316L Stainless Steel to Protect Against Corrosion
Factory-Installed Power Cord
Easy-Link up to 4 Units
Energy Star® Qualified
AHRI Certified
Lead-Free
Field Convertible From Natural Gas To Propane Complies with Scaqmd Rule 1146.2 and Other Air Quality Management Districts with Similar Nox Emission Requirements Of 14 Ng/J or 20 Ppm Maximum Flow Rates Up To 10.0 Gpm
Copper Heat Exchanger
25X Better Heat Transfer Than Stainless Steel Thus
Stabilizing Outgoing Water Temperature Quicker and Reducing Pressure Drop Across The Heat Exchanger
Indoor and Outdoor Model
Outdoor Models Include Remote Control As A Standard Feature Indoor Models Include A Built-In Temperature Controller and A Factory-Installed Power Cord As Standard Features
Easy-Link Up To 4 Units
Multi-Link Up To 20 Units
Lead-Free
Field Convertible From Natural Gas To Propane Complies with Scaqmd Rule 1146.2 and Other Air Quality Management Districts with Similar Nox Emission Requirements Of 14 Ng/J or 20 Ppm Maximum Flow Rates Up To 10.0 Gpm
Copper Heat Exchanger
25X Better Heat Transfer Than Stainless Steel Thus
Stabilizing Outgoing Water Temperature Quicker and Reducing Pressure Drop Across The Heat Exchanger
Indoor and Outdoor Model
Outdoor Models Include Remote Control As A Standard Feature Indoor Models Include A Built-In Temperature Controller and A Factory-Installed Power Cord As Standard Features
Easy-Link Up To 4 Units
Multi-Link Up To 20 Units
Lead-Free
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