¿Cuántos ventiladores necesita mi nave?

Depende de la longitud, ancho, densidad objetivo, temperatura de diseño y altitud. Como punto de partida, una nave broiler túnel de 120 m × 15 m en clima cálido suele emplear 8–12 ventiladores túnel de 137 cm a 45.000 m³/h cada uno. Use la calculadora de ventilación para su sitio específico.

¿Merece la pena el CAPEX de la refrigeración evaporativa?

En climas con depresión bulbo húmedo > 6 °C durante las semanas pico (gran parte de África, Oriente Medio, Sur de Asia, Latinoamérica y sur de Europa), sí — la diferencia en mortalidad y FCR paga el sistema de paneles en uno o dos lotes. En climas fríos y húmedos suele ser innecesaria.

¿Ventilación transversal o túnel — cuál es mejor?

El túnel es estándar en broilers y climas con estrés calórico; la transversal es habitual en aviarios de puesta y jaulas en zonas templadas. Las dos pueden ser correctas — la elección errónea es fijar el tipo antes de definir el punto de diseño climático.

¿Puedo pasar una nave antigua de ventilación natural a túnel?

A menudo sí, pero verifique longitud (> 90 m para conseguir velocidad túnel efectiva), estado de los frontales, aislamiento y capacidad eléctrica. Consulte el hub de modernización para casos de retrofit.

¿Ofrecen revisión de diseño de ventilación independiente?

FeedMatch no es una ingeniería. Conectamos a compradores comerciales con consultores de ingeniería avícola independientes para revisión de diseño cuando el proyecto lo justifica — habitualmente recomendado por encima de 500.000 USD de CAPEX de equipamiento.

Combien de ventilateurs pour mon bâtiment ?

Cela dépend de la longueur, la largeur, la densité cible, la température de conception et l'altitude. Comme point de départ, un poulailler tunnel broiler de 120 m × 15 m en climat chaud utilise typiquement 8–12 ventilateurs tunnel de 137 cm à 45 000 m³/h chacun. Utilisez la calculatrice ventilation pour votre site.

Le refroidissement par évaporation vaut-il son CAPEX ?

Dans les climats à dépression du thermomètre humide > 6 °C sur les semaines de pointe (Afrique, Moyen-Orient, Asie du Sud, Amérique latine, sud de l'Europe), oui — l'écart de mortalité et d'IC en semaine de pointe rembourse les pads en un à deux lots. En climat froid et humide, c'est souvent superflu.

Ventilation transversale ou tunnel ?

Le tunnel est standard sur broilers et climats à stress thermique ; la transversale est courante sur volières de ponte et cages en zone tempérée. Les deux peuvent être justes — la mauvaise décision consiste à figer le type avant de définir le point de conception climatique.

Peut-on convertir un vieux bâtiment de ventilation naturelle en tunnel ?

Souvent oui, mais vérifiez la longueur (> 90 m pour obtenir la vitesse tunnel effective), l'état des pignons, l'isolation et la capacité électrique. Voir le hub modernisation pour des retours de retrofit.

Proposez-vous une revue de conception ventilation indépendante ?

FeedMatch n'est pas un bureau d'études. Nous mettons les acheteurs commerciaux en relation avec des consultants avicoles indépendants pour une revue de conception lorsque le projet le justifie — recommandé au-delà de 500 000 USD de CAPEX équipement.

How do I measure ammonia?

Electrochemical or NDIR sensors, $300–1,200 fixed installation. Portable Dräger tubes $5/measurement — good for spot-checks. Sensor at bird height, not ceiling.

Does dry litter alone solve ammonia?

Mostly yes for the first 3 weeks. After that even dry litter has enough bacteria to produce ammonia at high stocking. Acidifier + ventilation still needed.

Are ammonia scrubbers required outside EU?

Not yet in most markets. Environmental regulation is trending toward mandatory in dense poultry regions. Design for retrofit even if not required today.

Can I reduce ammonia through diet?

Yes — lower crude protein with synthetic amino acids cuts uric acid excretion. Nutritionist-owned decision but usually 15–25% ammonia reduction achievable.

Does FeedMatch source litter management products?

Yes — acidifiers, spreaders and litter management equipment, plus scrubber systems where required.

Pillar Guide · Ventilation & Climate

Poultry Ventilation & Climate Control: A Commercial Engineering Guide

Ventilation is where commercial poultry projects most often succeed or fail. The system must deliver two independent duties simultaneously: (1) minimum air-quality ventilation (removing CO₂, NH₃, moisture) and (2) sensible cooling at peak load. This pillar covers the sizing methodology, mode transitions and RFQ language a commercial buyer needs.

Minimum, transitional, tunnel modes
Evap-cooling sizing
Ammonia & CO₂ control
Independent design review

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Project references

Visual scope of pillar guide · ventilation & climate

Three ventilation modes — one control philosophy

Modern commercial houses run three modes tied to outdoor temperature: minimum (fixed timer + inlet), transitional (variable-speed tunnel fans with side inlets), and tunnel (all fans + evap cooling). The controller manages transitions on outdoor and inside temperature, static pressure and CO₂. Buying a house without integrated static-pressure control is a false economy — birds pay for it in FCR and mortality.

Sizing ventilation from first principles

Minimum ventilation is sized on moisture (typically 1.0–1.4 m³/h per kg bird) or CO₂ (< 3,000 ppm target). Tunnel ventilation is sized on wind-chill effective temperature — a 2.0–3.0 m/s air velocity through the bird zone at peak stocking. Evaporative cooling reduces incoming air by 4–10 °C depending on wet-bulb depression; verify with local psychrometric data before ordering pads or fogging. Use the ventilation calculator for your target house dimensions and climate.

Static pressure — the KPI most RFQs miss

House static pressure (typically 20–35 Pa in minimum ventilation) drives inlet air throw and mixing. Suppliers should quote inlet size and count with a pressure-vs-flow chart, not just a fan count. Ask the supplier for a static-pressure calculation for your house dimensions signed by their engineer — this is a standard deliverable.

Ammonia, CO₂ and welfare limits

Commercial welfare thresholds: NH₃ ≤ 20 ppm, CO₂ ≤ 3,000 ppm, relative humidity 50–70%. EU broiler welfare directive 2007/43 requires monitoring. Ammonia control is 60% ventilation, 40% litter management — no ventilation system alone will fix a wet-litter problem. See the biosecurity and litter management hubs.

Backup power sizing for ventilation

Ventilation is the single most safety-critical utility on a poultry farm. A 6-hour outage in tunnel mode is a mortality event. Backup generator must cover full tunnel load with 25% margin, start unassisted on grid loss, and be tested weekly. Battery-backed controller ensures fans keep running through the transfer. See the backup power hub.

In-depth articles in this pillar

1. What equipment do you need? *17 options

2. Type of poultry *

3. Project type *

3b. Project stage *

Tells suppliers how mature the requirement is and how to structure their quote.

4. Estimated CAPEX / procurement value (USD)

Select the bracket that best matches your allocated or anticipated budget. This helps us route the RFQ to suppliers with the right project capacity.

4b. What are you looking for?

Pick all that apply.

4c. Preferred suppliers or brands (optional)

If you already have suppliers or equipment brands in mind, list them (comma-separated). We benchmark them against comparable qualified alternatives — vendor-neutral, no lock-in.

4d. Preferred technical specification (optional)

House size, climate zone, production target, equipment standards, Incoterms, warranty terms, or any must-have scope items. The more specific, the more comparable the quotes.

4e. Target quote submission date (optional)

When do you need supplier proposals back? We align outreach and reminders to this date.

5. Expected decision / award timeline

6. Where & how big?

6b. Farm size

6c. Equipment details (optional)

7. Your contact details *

💬 Anything else? (pick all that apply)

💰 I'd like to explore project financing (equipment, turnkey, or expansion).

📝 Project description (optional — helps suppliers quote faster)

Free for buyers · Supplier-paid model · No obligation · Human-assisted sourcing

Most buyers receive initial supplier matches within 24–72 hours.

FAQ

Common questions

How many fans does my poultry house need?

Depends on house length, width, target stocking density, design temperature and altitude. As a starting point a 120 m × 15 m tunnel broiler house in a hot climate typically uses 8–12 tunnel fans of 137 cm at 45,000 m³/h each. Use the ventilation calculator for your specific site.

Is evaporative cooling worth the CAPEX?

In climates with wet-bulb depression > 6 °C for peak weeks (most of Africa, Middle East, South Asia, Latin America, southern Europe), yes — the mortality and FCR difference at peak week pays back the pad system in one to two flocks. In cool humid climates, it is often unnecessary.

Cross ventilation or tunnel — which is better?

Tunnel is standard for broilers and heat-stressed climates; cross ventilation is common for layer aviaries and cage systems in temperate zones. Both can be correct — the wrong choice is picking the type before defining the climate design point.

Can I upgrade an old house from natural to tunnel ventilation?

Often yes, but check house length (needs > 90 m for effective tunnel wind speed), gable-end wall condition, insulation and electrical capacity. See the modernization hub for retrofit case studies.

Do you provide independent ventilation design review?

FeedMatch is not an engineering firm. We connect commercial buyers with independent poultry engineering consultants for design review when the project justifies it — usually recommended above USD 500k equipment CAPEX.