Weil-McLain 383-500-734 - Ultra Series 4 Natural Gas Condensing Water Boiler, 105K BTU, 94% AFUE, Direct Vent
Weil-McLain 383-500-734 - Ultra Series 4 Natural Gas Condensing Water Boiler, 105K BTU, 94% AFUE, Direct Vent
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The Weil-McLain Ultra Series 4 natural gas condensing water boiler (part number 672619208964, model designation 383-500-734) delivers hydronic space heating. Operating on natural gas with a 105 MBTU input rating, this direct-vent unit achieves an annual fuel utilization efficiency rating of 94% AFUE.
Condensing water boilers extract thermal energy from combustion gases by condensing water vapor produced during the firing cycle. This design allows the equipment to capture latent heat, while direct-vent piping manages the dedicated intake of outside combustion air and discharge of exhaust gases.
Key Performance Features:
- Thermal Input: Rated for an input capacity of 105 MBTU (105K BTU).
- Operating Efficiency: Provides a 94% AFUE rating for hydronic heating performance.
- Fuel Specification: Designed for use with natural gas fuel supplies.
- Direct Venting: Engineered for direct-vent configuration for combustion air intake and venting.
- Model Series: Identified under the Weil-McLain Ultra Series 4 product line.
Application: Weil-McLain Ultra Series 4 hydronic heating systems. Confirm the part number against your existing part or unit, or send your model and serial number to National Boiler Supply to verify before ordering.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 672619208964 |
| Model Designation | 383-500-734 Ultra Series 4 |
| Input Rating | 105 MBTU |
| Efficiency Rating | 94% AFUE |
| Fuel Type | Natural Gas |
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