Weil-mclain 672619218574 Wgotm Series 4 Cast Iron Hot Water Oil Boiler 147 Mbh 86.1% Afue

Product Description

The Weil-McLain 672619218574 is a cast iron hot water oil boiler from the WGOTM Series 4 lineup, engineered for residential floor-mount installations that demand reliable, long-lasting heating performance. This unit is a dedicated water-only oil boiler, meaning it does not include a tankless heater or cover plate. It is built for HVAC professionals and heating contractors who need a rugged, field-serviceable boiler that can handle demanding heating loads. The boiler carries an input rating of 147 MBH and delivers up to 176,000 BTU of heating output, making it well suited for larger residential applications. The AFUE rating reaches 86.1% when paired with an optional Vent Damper Kit, which also qualifies the unit for Energy Star certification. Without the damper kit, the unit operates at approximately 85% AFUE. Cast iron construction provides exceptional durability and long service life, a major advantage over steel alternatives in forced hot water systems. The WGOTM Series 4 features a quick-open top and a swing-away burner door that gives technicians full combustion chamber access for inspection, cleaning, and servicing without removing major components. Two flue outlets located on the rear and top of the unit offer complete venting flexibility, allowing installers to route exhaust through natural draft vent configurations in virtually any residential mechanical room layout. The recessed target wall design protects internal components from damage during flue brush cleaning. The boiler includes a low water cutoff (LWCO) and full water trim as standard equipment. The burner is sold separately — compatible options include Carlin, Beckett, and Aiello burners. Supply and return pipe connections are both 1-1/2 inches. The unit is AHRI Certified, CSA Certified, ASME compliant, and UL Listed. Overall dimensions are approximately 20-1/4 inches wide, 20 inches deep, and 35-5/8 inches tall. Operating voltage is 120V single phase with a flow rate of 1.45 gallons per hour. The slate gray exterior finish was updated in 2021. This boiler is the right choice for heating contractors replacing aging cast iron oil boilers or installing new heating systems in residential settings where oil fuel is the primary energy source.

• Cast iron sectional construction for maximum durability and long service life in residential oil heating systems
• Swing-away burner door and quick-open top provide full combustion chamber access for fast, efficient servicing
• Two rear and top flue outlets with natural draft venting allow flexible installation in a wide range of mechanical room configurations

Product Highlights

The Weil-McLain WGOTM Series 4 cast iron oil boiler delivers 147 MBH input and up to 86.1% AFUE in a floor-mount package built for residential oil heating. AHRI Certified and UL Listed, it is a dependable choice for professional installation by qualified HVAC and heating contractors.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: 672619218574

Technical Specifications

• Collection: WGOTM Series 4
• Application: Residential
• Material: Cast Iron
• Fuel Type: Oil
• Input (MBH): 147 MBH
• BTU Output: 176,000 BTU/h
• AFUE: 85% (up to 86.1% with optional Vent Damper Kit)
• Condensing: No
• Vent Type: Natural Draft
• Installation Type: Floor Mount
• Supply Pipe Connection Size: 1-1/2 inches
• Return Pipe Connection Size: 1-1/2 inches
• Flow Rate: 1.45 gallons per hour
• Voltage: 120V
• Phase: Single Phase
• Width: 20-1/4 inches
• Depth: 20 inches
• Height: 35-5/8 inches
• AHRI Certified: Yes
• ASME: Yes
• CSA Certified: Yes
• UL Listed: Yes
• Energy Star Compliant: Qualified with optional Vent Damper Kit