Part #309NI
US Boiler Co Cast Iron Boiler 84% AFUE 280k Input, 234K Gross Out, 234K Net Out, 484 lbs, 1-1/4" NPT Heating Connections, 3/4" NPT Gas Connection, 8" Vent Size, Dims (WxDxH) 30-3/4" W x 33" D x 41"H
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Part #309NI
Series 3 Cast Iron Boiler 280k 84% AFUE

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- Brand: US Boiler CoVent Type: ChimneyVoltage Rating: 120 VACMounting Type: FloorDimensions: 30-3/4 in W x 33 in D x 41 in HDomestic/Import: DomesticSeries: Series 3™DOE Heating Capacity: 234 mbhAFUE Rating: 84 %Type: 9-SectionFuel Type: Natural GasFuse Size: 3 AWater/Steam Content: 7 galNet IBR Rating: 203 mbhFlue Outlet Size: 8 in DiaConnection Type: 1-1/4 in NPTIgnition Type: ElectronicInput Capacity: 280 mbhAmperage Rating: 15 AHousing Material: Cast Iron
- The Series 3 shares many of its features with the award winning ES2, including the durable cast iron heat exchanger, rugged heavy gauge steel base and the innovative IQ Control System. The IQ Control System allows the Series 3 to be easily equipped with an optional energy saving control package that, according to many studies, can deliver up to a 15 to 20% reduction in fuel consumption. In addition, the Series 3 provides even more flexible chimney venting options making it the right choice for millions of homes.
- Time proven cast iron design for durability and reliability|Optimum venting flexibility for homes with existing chimneys|IQ boiler control system