Poultry ventilation calculator — tunnel airflow (cfm) sizing.
Compute peak tunnel-ventilation cfm from house cross-section and target air speed, plus indicative fan count for typical 48-inch 25,000 cfm fans.
Inputs
Results
- Cross-section
- 36.4 m²
- Tunnel airflow
- 91.0 m³/s
- Peak airflow required
- 192,818 cfm
- 48-inch fans (at working pressure)
- 10
- Engineering confirmation
- Required
Width × sidewall height — a simplified rectangle, not a surveyed section.
193k cfm
Sized on 21,250 cfm/fan at ~25 Pa. Free-air catalogue sizing would show only 8 fans and under-ventilate the house.
Final fan count, inlet area and static-pressure design must come from a ventilation engineer using the actual fan curves.
How to read this result
Based on: House width 14 m · Sidewall height 2.6 m · Target air speed 2.5 m/s
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 |
|---|---|---|---|
| Cross-section | 36.4 m² | 36.4 m² | 36.4 m² |
| Tunnel airflow | 91.0 m³/s | 91.0 m³/s | 91.0 m³/s |
| Peak airflow required | 221,741 cfm | 192,818 cfm | 173,536 cfm |
| 48-inch fans (at working pressure) | 11 | 10 | 9 |
| Engineering confirmation | Required | Required | Required |
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 Poultry ventilation calculator — tunnel airflow (cfm) sizing. (expected scenario). Inputs: House width: 14 m; Sidewall height: 2.6 m; Target air speed: 2.5 m/s Estimated: Cross-section 36.4 m²; Tunnel airflow 91.0 m³/s; Peak airflow required 192,818 cfm; 48-inch fans (at working pressure) 10; Engineering confirmation Required 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
- House width, Sidewall height, Target air speed
- Calculated output
- Cross-section, Tunnel airflow, Peak airflow required, 48-inch fans (at working pressure), Engineering confirmation
- 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.
- cross-section = width × sidewall height
- airflow (m³/s) = cross-section × target air speed
- airflow (cfm) = m³/s × 2118.88 × scenario factor
- fan count = airflow ÷ (25,000 cfm free air × 0.85 static-pressure derate)
Limits
- Does not size inlets, does not model static-pressure distribution, and does not cover minimum or transitional ventilation modes.
- Requires the manufacturer's actual fan performance curve before any purchase decision.
In short
This ventilation 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 ventilation 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.