Boiler — Columbia MPH-70

PLR

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Steam Flow

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Steam Temp

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Efficiency

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Fuel Input

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Net Output

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h_steam

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h_return

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Efficiency vs Part-Load Ratio

Columbia MPH-70 Nameplate Ratings

Model	Columbia Boiler MPH-70
Boiler Horsepower	70 BHP
Net Steam Output (IBR)	1,823,682 BTU/hr
Gross Output	~2,338,250 BTU/hr (70 × 33,475)
Fuel Input (gas)	~2,940,000 BTU/hr
Thermal Efficiency	≥83%
Design Pressure	15 psig (ASME Sec IV)
T_sat at 15 psig	≈250°F
Return Condensate Temp	180°F (default)
Fuel Types	Natural gas, LP, #2 oil
Construction	Multi-pass horizontal firetube