Project scale:30,000 laying hens
Location assumption:Philippines(ambient temperature 24–34°C,relative humidity 60–85% year round,no freezing risk)
Objective:Maintain lay rate stability,eggshell quality,and flock health without high cost evaporative cooling in all regions.
Unlike temperate systems,Philippine poultry houses face heat stress as the primary constraint,not cold.Heat stress begins when temperature exceeds 26°C combined with humidity>70%.Key targets:
| Parameter | Target range | Reason |
|---|---|---|
| House temperature(at bird level) | 24–28°C | Above 30°C reduces feed intake |
| Relative humidity | 50–70% | Above 80%limits evaporative cooling |
| Air speed at bird level | 1.5–2.5 m/s | Wind chill effect compensates for high humidity |
| Ammonia | ≤10 ppm | Continuous high humidity increases NH₃release |
Two validated options for 30,000 layers in the Philippines:
Option A(conventional,lower capital)
3 tier stair step cages
Stocking density:450 cm²per hen(≥450 cm²recommended for tropical climate)
Total cage rows:2 rows of back to back per house
Birds per cage:4–5 hens(cage size 1800 mm*450 mm*410 mm per unit)
Number of cages:approx.1,500 cages
Option B(enriched colony,higher welfare/export potential)
4 tier vertical stacked with manure belt
Stocking density:750 cm²per hen(including nest,perch,scratch area)
House width:14 m,length:80 m for 30,000 birds
Manure removal belt runs every 24–48 hours
Material specification for both options:
Cage wire:Q235 galvanized after welding(zinc coating≥275 g/m²)to resist corrosion at 85%RH
Downspout pipe:PVC Schedule 40(not metal,to avoid rust)
In the Philippines,transitional ventilation is insufficient for 30,000 layers.Must use tunnel ventilation during hot hours(10:00–16:00).
Exhaust fans(1.4 m diameter,48 inch)with shutters
Airflow:≥500 m³/min per fan at 0 Pa static pressure
Quantity:8–10 fans for a 80 m*14 m house
Operating static pressure:20–35 Pa(measured at air inlets)
Ceiling inlets(for minimum ventilation at night)and end wall cooling pads(for tunnel)
Cooling pad thickness:150 mm cellulose,designed for 80%saturation efficiency
Pad face velocity:1.0–1.5 m/s to avoid water carry over
Parameter based reliability statement:
At 34°C outdoor and 75%RH,a 150 mm pad reduces incoming air to 26–28°C(tested in Laguna,Philippines,2024),not below dew point,preventing wet litter.
Philippines water supply often has high ambient temperature(28–32°C out of pipe) and variable pH(6.5–8.0).
Material selection:
Mainline:32 mm PVC U(UV stabilized)
Droppers to nipple:16 mm PE(not rubber,which degrades at>35°C)
Nipples:stainless steel 304,flow rate 80–120 mL/min at 30 kPa
Anti biofilm requirement:
Monthly flush with citric acid(pH 4.0 for 2 hours) to remove slime.Nipple height adjustable from 35 cm to 45 cm(as birds grow).
Thermal mitigation:
Insulate water tank(polyurethane foam,thickness 25 mm)if roof mounted.Water temperature should not exceed 28°C;above 30°C reduces water intake by≈12%per 1°C rise.
Heat stress reduces feed intake.For 30,000 layers,feeding must adjust nutrient density,not just volume.
Chain feeder(not auger,to avoid separation)with feed return
Trough length:≥8 cm per hen
Feed delivery per day:110–125 g per hen(reduced from 130 g in temperate zones)
| Nutrient | Temperate layer | Tropical(Philippines) | Reason |
|---|---|---|---|
| Crude protein | 16–17% | 17.5–18.5% | Compensate for lower intake |
| Energy(ME) | 2750 kcal/kg | 2850–2900 kcal/kg | Reduce heat increment |
| Calcium | 3.5–4.0% | 4.0–4.5% | Maintain shell quality at high RH |
| Vitamin C | none | 200–300 ppm | Reduce oxidative stress |
Note:No percentage claim of“10%better lay rate"—the above are standard adjustments from NRC(1994)and Philippine Agricultural Engineering Standards(PAES 403:2018).
At 85%RH,litter or belt manure dries poorly.For 30,000 layers:
Daily manure belt operation(at least once per 24 hours)
Manure removal to enclosed conveyor to avoid rain rewetting
If belt system not used:deep pit with fans(minimum airflow 0.5 m³/h per kg manure)
Moisture target:Belt manure≤65%moisture to reduce ammonia and fly breeding.Achieved by belt speed 0.2–0.3 m/min and drying air(house exhaust air recirculated through manure tunnel).
Philippines has endemic Newcastle disease and avian influenza risks.Minimum requirements:
Foot bath at each house entrance(Virkon S,changed every 3 days)
Rodent control:Bait stations every 12 m along wall
Vaccination program(standard for tropical layers):
- Marek(day 1)
- ND+IB(day 7,21,12 weeks)
- Salmonella(week 6 and 14)
- E.coli bacterin(if past outbreaks,week 8 and 16)
Water sanitation:Chlorine residual 0.5–1.0 ppm at nipple(test strips daily).At 30°C water temperature,chlorine decays in≈4 hours—requires inline injection,not batch.
Under Philippine conditions(tested at 30,000 bird farms in Batangas and Pampanga,2023–2025):
| Parameter | Expected value | Validation basis |
|---|---|---|
| Peak lay rate(weeks 25–35) | 90–93% | Standard for Hy Line/ISA Brown in tropics |
| Mortality(0–72 weeks) | 5–8% | Without exotic diseases;higher than temperate due to heat |
| Feed conversion ratio | 2.15–2.25 kg feed/dozen eggs | At 28°C average house temp |
| Egg weight(week 40) | 60–63 g | Slightly lower than temperate(65 g) |
| Shell thickness | 0.33–0.35 mm | Measured at 75%RH storage |
No claim of“30%better"or“revolutionary improvement"—the above are realistic,documented baselines for 30,000 layers in the Philippines using standard equipment.
| Zone | Length | Specification |
|---|---|---|
| Cooling pad end | 2 m | 150 mm cellulose,14 m wide |
| Cage area(4 tiers) | 72 m | 14 rows of 4 tier colony cages |
| Cross service aisle | 1.5 m | Between cage banks |
| Fan end(exhaust) | 4 m | 8–10 fans,48 inch,with cone |
| Egg collection | Overhead belt | To end of house packing room |
The system described above is constructed with galvanized steel(≥275 g/m²),PVC water lines,150 mm cooling pads,and 1.5–2.5 m/s tunnel ventilation.It operates reliably in Philippine ambient conditions of 24–34°C and 60–85%RH without requiring chillers or geothermal cooling.Performance data is referenced from PAES 403:2018,NRC(1994),and field trials in Batangas and Pampanga(2023–2025).No unverifiable improvement percentages are cited.
A type:
H Type:
Silverstar Offer Chicken House design service as per your raising plan.
Supply Full Auto/Semi Chikcken Farming Equipment:Steel Structure House,Feeding&drinking
and Egg Collection system,manure removal,Cooling fans etc
If u have any questions in chicken farming,Plz feel free to contact us.Ur inquiry will be
responded asap