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Weil-McLain 383500704 Ultra - 230,000 BTU - Hot Water Boiler - NG - 95.4% AFUE - Direct Vented - Up to 5,500 ft altitude

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Product Specifications
General Information
Product Line
Hot Water
Fuel Source
Natural Gas
Combustion Type
Vent Type
Direct Vent
DHW Production
Mount Type
Minimum Altitude (Feet)
0 Feet
Maximum Altitude (Feet)
5500 Feet
Includes Pump
Assembly Type
Maximum Input Capacity (BTU)
230000 BTU
Minimum Input Capacity (BTU)
46000 BTU
Input Capacity Range
DOE Heating Capacity (BTU)
207000 BTU
Net I=B=R Capacity (BTU)
183000 BTU
Efficiency (%)
95.4 %
Efficiency Type
Electrical Data
Voltage (Volts)
120 Volts
Frequency (Hertz)
60 Hertz
Flue Connection Size (Inches)
3 Inches
Boiler Supply (Inches)
1 Inch
Boiler Return (Inches)
1 Inch
Product Height (Inches)
42.625 Inches
Product Width (Inches)
22.875 Inches
Product Depth (Inches)
19.0625 Inches
Product Weight (Pounds)
246 Pounds
Warranty Information
Parts Warranty (Years)
2 Years
Heat Exchanger Warranty (Years)
20 Years
Energy Star Listed
CSA Listed
Country of Origin
United States
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Weil-McLain Ultra - 230,000 BTU - Hot Water Boiler - NG - 95.4% AFUE - Direct Vented - Up to 5,500 ft altitude

Designed and made in the USA, the Weil-McLain Ultra Natural Gas Hot Water Boiler is a highly efficient 230,000 BTU/hour, gas-fired boiler with an aluminum heat exchanger for your heating needs. With an 95.4% AFUE, this boiler can be used in a variety of applications including residential heating, light commercial heating, and indirect-fired water heating. This unit is designed for applications from 0 to 5,500 feet in elevation and comes equipped with direct venting, providing 207,000 BTU/hour in DOE heating capacity. Ultra Series boilers are designed with high grade stainless steel burners and variable speed motors to optimize fuel efficiency.

Weil-McLain Ultra Natural Gas Hot Water Boiler Features:
  • Aluminum heat exchanger
  • Venturi mixing body
  • Variable speed motor
  • Stainless steel burner
  • 95.4% AFUE
  • 5,500 ft. maximum altitude
  • Taco 0014 circulation pump
  • Direct venting
Weil-McLain Ultra Natural Gas Hot Water Boiler Warranty:
  • 2 year parts warranty
  • 20 year heat exchanger warranty

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