
The Weil-McLain CGI-6 Series 5 hot water boiler, part number 381-359-364, is a natural gas hydronic heating unit designed to supply heated water for space heating applications. It delivers a heating output of 117,000 BTU and operates with an 84% thermal efficiency rating. This unit features spark ignition and comes packaged with a Taco 007 circulator.
Cast iron hot water boilers operate by combusting fuel to warm water circulated through heavy-duty heat exchanger sections. The heated water is then distributed through the connected piping loop by the circulator pump to provide steady thermal energy to the heating system.
Key Performance Features:
- Heating Output: Delivers a 117,000 BTU output fueled by natural gas.
- Cast Iron Construction: Built with cast iron sections for solid heat retention and transfer.
- Included Circulator: Ships with a Taco 007 circulator to facilitate hydronic loop flow.
- Thermal Efficiency: Rated at 84% thermal efficiency for effective fuel utilization.
- Ignition System: Employs spark ignition for automated burner startup.
Application: Weil-McLain CGI-6 Series 5 hydronic heating installations. Please confirm the part number against your existing 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) | 381-359-364 |
| Model Designation | CGI-6 Series 5 |
| Heating Output | 117,000 BTU |
| Fuel Type | Natural Gas |
| Thermal Efficiency | 84% |
| Body Construction | Cast Iron |
| Included Components | Taco 007 Circulator |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.