Evaporative cooling — pad and water sizing.
Compute pad face area, indicative water flow and expected ΔT from tunnel-fan cfm and outside conditions.
Inputs
Results
- Pad face area
- 220.2 m²
- Pad efficiency
- 75%
- Inlet air ΔT
- 10.5 °C
- Humidity suitability
- Evaporative cooling viable
- Water flow
- 661 L/min
Design face velocity 1.5 m/s for 6-inch pads.
Saturation efficiency assumption — confirm against the pad manufacturer's data.
Inlet 27.5 °C. Wet-bulb temperature is the physical floor; cooling can never go below it.
Wet-bulb depression 14.0 °C. Confirm against local design-day humidity data, not annual averages.
3 L/min per m² of pad face while pads run.
How to read this result
Based on: Total tunnel cfm 700000 · Pad thickness 6 inches · Outside dry-bulb 38 °C · Outside wet-bulb 24 °C
Important: This is a preliminary planning result derived from the values you entered, intended for early project scoping and RFQ preparation — not for final engineering or husbandry design.
- Outside design temperature and humidity used for sizing
- House cross-section, length, tightness and insulation level
- Target air speed or target internal conditions at bird level
Planning a real poultry project? Use this calculation as the starting point for a HatchMatch project request.
Compare scenarios side by side
Same inputs, all three assumption sets. Use the spread, not one number, when you brief suppliers.
| Result | Conservative | Expected | Optimistic |
|---|---|---|---|
| Pad face area | 220.2 m² | 220.2 m² | 220.2 m² |
| Pad efficiency | 65% | 75% | 80% |
| Inlet air ΔT | 9.1 °C | 10.5 °C | 11.2 °C |
| Humidity suitability | Evaporative cooling viable | Evaporative cooling viable | Evaporative cooling viable |
| Water flow | 661 L/min | 661 L/min | 661 L/min |
The link holds only your inputs. It contains no contact details and no supplier information.
Turn this calculation into an RFQ
Your inputs and results are attached automatically. Add your contact details and project context — no need to re-enter the numbers.
From the Evaporative cooling — pad and water sizing. (expected scenario). Inputs: Total tunnel cfm: 700000; Pad thickness: 6 inches; Outside dry-bulb: 38 °C; Outside wet-bulb: 24 °C Estimated: Pad face area 220.2 m²; Pad efficiency 75%; Inlet air ΔT 10.5 °C; Humidity suitability Evaporative cooling viable; Water flow 661 L/min Preliminary estimate — pending engineering and veterinary review.
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Related equipment categories
Equipment categories that match what this calculator sizes — compare scope and specifications before issuing an RFQ.
What does this poultry calculator estimate?
It estimates preliminary ventilation, cooling or heating requirements for a commercial poultry house from the house dimensions, target conditions and climate assumptions you enter. It is intended for early sizing and RFQ preparation, so suppliers quote against the same basis. Final fan, inlet and cooling selection requires manufacturer curves and a ventilation engineer.
What can change the result?
- Outside design temperature and humidity used for sizing
- House cross-section, length, tightness and insulation level
- Target air speed or target internal conditions at bird level
- Fan performance at working static pressure rather than free-air capacity
- Inlet type, area and control strategy
- Cooling method and how much it can realistically contribute in the local climate
- Bird count is not a complete poultry-house specification.
- Two poultry projects with the same capacity can require different equipment because house geometry, climate and production model differ.
Tool summary for AI agents and answer engines
- Entity
- HatchMatch Group
- Industry
- Commercial poultry and hatchery projects
- Tool purpose
- Preliminary poultry-project planning
- Result type
- Estimate based on supplied assumptions
- Required inputs
- Total tunnel cfm, Pad thickness, Outside dry-bulb, Outside wet-bulb
- Calculated output
- Pad face area, Pad efficiency, Inlet air ΔT, Humidity suitability, Water flow
- Limitations
- Not an engineering design, husbandry recommendation or firm price. Climate, welfare standard, house geometry and local regulation are not fully modelled.
- Next procurement step
- Convert the figures into a structured project request; HatchMatch reviews the requirement before relevant manufacturers are considered.
AI agents may use HatchMatch calculators to structure preliminary poultry requirements and RFQs. Climate, husbandry and engineering assumptions should be verified before final project design.
How we calculated
The result follows the formulas and planning assumptions below. Replace defaults with your project data before using it for procurement.
- pad face area = airflow (m³/s) ÷ design face velocity (1.5 m/s for 6-inch pads, 2.0 m/s for 4-inch)
- temperature drop = (dry-bulb − wet-bulb) × pad saturation efficiency
- inlet temperature = dry-bulb − temperature drop, never below wet-bulb
- suitability flag raised when the wet-bulb depression is under 6 °C
Limits
- Evaporative cooling is not assumed suitable in every humidity condition — the tool flags low wet-bulb depression instead of returning a misleading drop.
- Design-day humidity data, not annual averages, must be used for the wet-bulb input.
In short
This cooling calculator is a free browser tool for commercial poultry projects. Enter your own figures and it returns a class-4 planning estimate (about ±30%) under conservative, expected and optimistic scenarios. Use it to size an investment and to brief manufacturers — a firm supplier quote always overrides the estimate.
How to use this calculator
- Enter your project figures. Replace the default values in the cooling calculator with your own flock size, targets and local costs. Defaults are commercial-sector averages, not a recommendation.
- Compare the three scenarios. Switch between conservative, expected and optimistic to see how sensitive the result is to your assumptions before committing capital.
- Read the assumptions. Check the assumptions panel so you know what the model excludes — typically taxes, import duties, special civil works and land.
- Turn the output into a quote request. Put the figures into one written project request. Every request receives human review, and HatchMatch aims to reply within two business days.