HVAC Cooling Load Calculator
Sum actual zone sensible conduction/internal gains AND independently established moisture-condensation latent cooling loads; materially different from heating-only sensible budget. Caller independently establishes units, boundary, calibration and applicability; not code building-load compliance or equipment sizing approval.
Description
A zone cooling balance can include sensible conduction, internal contributions and latent condensation terms.
A zone cooling balance can include sensible conduction, internal contributions and latent condensation terms.1
The submitted zone data and latent-heat basis determine the signed total. Use this tool to calculate HVAC Cooling Load from the supplied measurements and assumptions.
When to use HVAC Cooling Load Calculator
Use this tool to calculate HVAC Cooling Load from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
How to use HVAC Cooling Load Calculator and understand its results
- Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
- Enter callerMatchedCoolingConductancesWK, observedCoolingZoneTemperatureDifferencesK, callerIndependentCoolingInternalWatts, callerIndependentCondensedWaterKgSecond, callerMatchedLatentHeatJKg, using the field meanings and rules below, then run the tool.
- Read signedTotalZoneLoadW. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerMatchedCoolingConductancesWK | Caller matched cooling conductances w k | list of number | Required |
| observedCoolingZoneTemperatureDifferencesK | Observed cooling zone temperature differences k | list of number | Required |
| callerIndependentCoolingInternalWatts | Caller independent cooling internal watts | list of number | Required |
| callerIndependentCondensedWaterKgSecond | Caller independent condensed water kg second | list of number | Required |
| callerMatchedLatentHeatJKg | Caller matched latent heat j kg | number | Required |
Enter nonempty aligned nonnegative zone conductances in W/K and condensation rates in kg/s, finite signed temperature differences and internal watts, and positive latent heat in J/kg. Sum conductance×difference+internal+condensation×latentHeat across zones. Signed sensible terms are retained; no moisture-state or equipment-sizing calculation is performed.
signedCoolingLoadW=Σ(U_i×ΔT_i+internalW_i+condensedKg/s_i×latentJ/kg) Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| signedTotalZoneLoadW | Signed Total Zone Load W; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"callerMatchedCoolingConductancesWK": [
2,
3
],
"observedCoolingZoneTemperatureDifferencesK": [
4,
2
],
"callerIndependentCoolingInternalWatts": [
1,
2
],
"callerIndependentCondensedWaterKgSecond": [
0,
0
],
"callerMatchedLatentHeatJKg": 100
},
"output": {
"signedTotalZoneLoadW": 17
}
}Limitations and assumptions
The submitted zone data and latent-heat basis determine the signed total. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use HVAC Heating Load Calculator for this related task: A zone heating balance combines conductance-temperature terms with signed internal contributions.
Use Relative Humidity from Wet-Bulb Calculator when its separate inputs and assumptions fit the question: A wet-bulb humidity model uses supplied saturation pressures and a psychrometric coefficient.
References
-
HVAC Cooling Load Calculator — tool.io
Similar or alternative tools
- HVAC Heating Load Calculator
A zone heating balance combines conductance-temperature terms with signed internal contributions.
- Relative Humidity from Wet-Bulb Calculator
A wet-bulb humidity model uses supplied saturation pressures and a psychrometric coefficient.