eng.HVAC-load-cooling Calculator
Calculates HVAC cooling load from sensible and latent contributions including envelope, solar, occupancy, lighting, and equipment. ASHRAE Handbook fundamentals CLTD/SCL method separates heat gain components — the peak load determines equipment sizing.
Inputs
- Floor Area M2
- Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
- U Roof W M2K
- Reference formula or conversion factor shown for context.
- U Wall W M2K
- Reference formula or conversion factor shown for context.
- T Out C
- Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
- T In C
- Reference formula or conversion factor shown for context.
- People
- Count of items or occurrences.
Results
- total cooling load Q (W)
- The combined total across all inputs and components.
- total cooling load (kW)
- The combined total across all inputs and components.
- cooling load (BTU/hr)
- Sample size or count used in the calculation.
- required TR (tons of refrigeration)
- The proportional relationship between two quantities.
- breakdown
- Sample size or count used in the calculation.
- load index (W/m²)
- A normalised score comparing the result to a reference baseline.
area roof total load cooling