Weil-McLain Ultra Boiler

Ultra Series 3-UE delivers peace of mind, unmatched comfort and immediate payback in energy savings.

Gas fired water boiler with cast aluminum heat exchanger
Venturi mixing body mixes air and gas providing higher efficiency
Designed to operate in low temperature condensing applications
Outdoor reset and domestic hot water priority standard
Negative regulated gas valve precisely delivers gas to the boiler
U-Control gives you the power for easy set-up and maintenance
Modulates with 5 to 1 turn-down ratio capability
Variable speed motor matches combustion output to heating needs
High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications

Model	A.G.A. Input (MBH)	DOE Heating Capacity (MBH)	Net I=B=R Ratings (MBH)	Min. Vent Size	Annual Fuel Utilization Efficiency (AFUE)
UG-80	80	71	62	2 or 3 in. PVC/CPVC	95.2%
UG-105	105	94	81	2 or 3 in. PVC/CPVC	95.3%
UG-155	155	139	123	3 in. PVC/CPVC	95.6%
UG-230	230	207	183	3 or 4 in. PVC/CPVC	95.4%
UG-299	299	270	234	4 in. PVC/CPVC	96.4%
UG-399	399	365*	317	4 in. PVC/CPVC	91.7%*

*Combustion Efficiency