Hydronic Baseboard Output
BTU/hr from manufacturer-attributed BTU/ft tables interpolated by water temp.
Example
You enter
- Avg water temp (°F) 180
- Flow (gpm) 1
- Length (ft) 8
- Model slant_fin_baseline
You get
- BTU/ft at this temp 580
- Total BTU/hr 4640
Checked against published worked examples from: Slant/Fin.
Details, formula, and sources
Formula or tableHydronic baseboard BTU/ft from manufacturer tables interpolated by water temperature; flow correction applied per manufacturer curve.
Source and editionSlant/Fin Fine Line 30 typical-curve and high-output reference (manufacturer-attributed).
Free accessFree at slantfin.com.
What governsEstimate. AHJ and licensed mechanical contractor govern. ACCA Manual J / D / S supersede rules of thumb.
API field nameswater_temp_F, flow_gpm, length_ft, model, btu_per_ft, btu_total
- Curve table data/hvac/baseboard-output.json keyed to model and water temperatureSlant/Fin technical literature