Release Type: Technical Guide · Phased Retrofit Plan
Date: July 17, 2026
Target Markets: Global · Old Poultry House Retrofit Projects
Old poultry house retrofitting is one of the most realistic scenarios in the poultry industry today. New standardized poultry houses require significant investment and long construction timelines. Meanwhile, a large number of poultry houses that are 5-10+ years old — typically with insufficient ceiling height, limited floor load-bearing capacity, and no pre-installed ventilation ducts — cannot accommodate high-rise stacked cages or achieve full automation in a single step.
However, a "one-step" approach is often not the optimal solution. Phased, modular retrofitting reduces upfront financial pressure while maintaining production during the upgrade process. The key question is: which systems must be upgraded first, and which can wait?
Before initiating any equipment replacement, three basic assessments must be performed on the existing poultry house:
| Assessment Item | Inspection Content | Criteria |
|---|---|---|
| Structural condition | Ceiling height, floor load capacity, wall integrity | Ceiling height <3.5m cannot accommodate 4+ tiers; floor must support total weight of cages + birds + equipment |
| Electrical capacity | Existing wire gauge, distribution panel capacity | Total power demand of automated equipment may far exceed original design — upgrade cost must be calculated |
| Ventilation ducts | Pre-installed air ducts, air inlet/outlet positions | No pre-installed ducts require surface-mounted ducting or external units |
Key decision: If ceiling height is below 3.5 meters and the floor requires full renovation, consider evaluating the economics of "demolish and rebuild" versus "lightweight retrofit." Insufficient ceiling height is a hard constraint that cannot be compensated by equipment selection later.
Based on Big Dutchman industry guidelines and domestic retrofit case studies, retrofit projects are divided into three priority levels:
Why start with cages and manure removal?
Cages form the "skeleton" of the poultry house, determining the installation positions and paths for all subsequent equipment (feeding lines, drinking lines, egg collection systems, manure belts). The manure removal system is the most labor-intensive daily operation — the labor savings from upgrading are the most direct and significant.
| Equipment | Retrofit Focus | Technical Parameter Reference |
|---|---|---|
| Cages | For old houses with insufficient ceiling height, use lightweight 3-4 tier cages to reduce floor load | Total cage height ≤2.5m (for 3.5m ceiling height); single-tier cage height ≥38cm |
| Manure removal | Prioritize side-mounted layer-by-layer manure belts, eliminating the need for deep underground gutters, reducing civil works | Belt speed 3-4 m/min; PP material thickness ≥1.0mm |
If budget is tight, can we upgrade only manure removal without changing cages? Yes — but confirm that the existing cage bottom structure can support manure belt or scraper installation. A-type step cages can be retrofitted with scraper-type manure removal without cage replacement, with the lowest investment.
Old fans must be replaced: After 5-10 years of use, belts loosen, bearings wear, and blades deform — actual airflow may drop by 10% or more. In summer, this means house temperatures rise by 1-2°C. Even if fans still appear to run, efficiency has already significantly declined — representing the largest "hidden cost" among aged equipment.
Why upgrade environmental control second?
After installing new cages and manure removal systems, if environmental control cannot keep up, flock performance will still be limited. The environmental control system is key to realizing the returns from earlier investments.
| Equipment | Retrofit Focus | Technical Parameter Reference |
|---|---|---|
| Fans | Replace old fans with variable-speed models | Energy consumption reduced by 40-60% ; payback period 2-5 years |
| Ventilation inlets | One of the most common retrofit mistakes: focusing only on cages while neglecting inlets | Inlet bottom ≥50cm above cage top; inlet spacing ≤1.5m |
| Cooling pads | Area must match fan capacity | Pad area ≈ fan area × 3; for houses >50m, combine gable pads with side pads |
| Insulation | Add roof and wall insulation | Heat load reduced by 15-30% ; payback period 3-6 years |
| Lighting | Replace all with LED | Lighting energy consumption reduced by approx. 50% ; payback period 1-3 years |
Fully enclosed retrofits require automatic environmental control: If converting from open or semi-open to fully enclosed, the environmental control system must be automated. Manually controlling temperature/ventilation in a fully enclosed house is actually more difficult — temperature fluctuations cause repeated disease outbreaks, including respiratory issues, rhinitis, and airsacculitis.
The core of environmental control is "inlet-outlet matching": Matching air intake (inlets + pads) with exhaust (fans) directly determines ventilation effectiveness and energy consumption. Inlet positions, quantities, and spacing must be recalculated based on house length, width, and bird density — this is not a "good enough" matter.
Why upgrade feeding and egg collection last?
These systems have less direct impact on production performance than environmental control, and their payback periods are longer. When capital is limited, manual or semi-automatic methods can be retained initially, with upgrades postponed.
| Equipment | Retrofit Focus | Applicable Conditions |
|---|---|---|
| Feeding system | Segmented feed lines for irregular house lengths; trolley-type feeders for floor-to-cage conversions | Prioritize when manual feeding costs are high; small-to-medium farms can use push-cart semi-automatic |
| Egg collection | Automatic collection must match cage structure | Reserve installation space during cage retrofit; farms with <30,000 birds can delay |
Special case: floor-to-cage conversions: If converting a floor-rearing house to cages, feeding system modification is unavoidable — trolley-type systems cannot accommodate cages and must be redesigned. In this case, feeding system and cage retrofit should proceed simultaneously.
| Phase | Timing | Scope of Work | Notes |
|---|---|---|---|
| Preparation | 1-2 months | Structural assessment, electrical inspection, system design | Define retrofit boundaries: what to keep, what to replace |
| Phase 1 | During flock gap period | Cages + manure removal system installation | Can be done in phases while maintaining partial production |
| Phase 2 | 3-6 months later | Environmental control (fans + inlets + pads + insulation) | Minimize flock disruption during construction |
| Phase 3 | 6-12 months later | Feeding system + egg collection system upgrade | Subject to budget availability |
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Don't keep fans "just because they still run": Fans over 5 years old experience significant efficiency loss. The most common retrofit mistake is keeping old fans because "they still work" — resulting in insufficient static pressure and airspeed. Replacing fans while birds are in the house causes stress.
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Inlets and cooling pads must be redesigned together: When converting an old house to fully enclosed, the positions, quantities, and sizes of air intakes are completely different from the original layout. The old inlet layout cannot be reused.
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Maintain manual backup capability: Full automation does not mean "unmanned operation." Manual override capability must be retained for power outages or equipment failure — manual fan switches and manure system manual clutches should be preserved.
Teng Bicheng‘s Retrofit Case in Jiande, Zhejiang Province:
| Metric | Before | After |
|---|---|---|
| Flock size | 40,000 birds | 90,000 birds |
| Management staffing | Multiple shifts | 1 person via smartphone |
| Key improvement | Traditional house | Fully enclosed with automated feeding/environmental control/egg collection/manure removal — full automation from feeding to environmental control |
"Everything is automated — from feeding, environmental control, to egg collection and manure removal," Teng said. "It‘s not just about saving labor. The stable environment for the chickens means lay rates and egg quality are naturally stable."
Tongxiang Shunyu Poultry Layer Farm Retrofit Plan:
| Metric | Before | After (Planned) |
|---|---|---|
| Flock size | 45,000 birds | 310,000 birds |
| Daily egg production | Approx. 40,000 | Up to 300,000 |
| Lay rate | Approx. 85% (95% peak) | Stable >90% (98% peak) |
| Management model | Semi-open, frequent staff entry | Enclosed automated, 1 person manages 100,000 birds |
Old poultry house automation retrofit is not a "one-time" project, but a phased, system-by-system progressive upgrade. Recommended priority order:
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Phase 1: Cages + Manure Removal — Determines space utilization and daily labor intensity — the "skeleton" of the retrofit
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Phase 2: Environmental Control (fans + inlets + pads + insulation + lighting) — Ensures flock performance and maximizes returns on earlier investments
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Phase 3: Feeding + Egg Collection — Reduces labor intensity — the "icing on the cake"
Key reminder: Fans cannot be kept "just because they still run." Fans over 5 years old can experience efficiency loss of 10% or more, and replacement while birds are in the house carries high risk. Inlets and cooling pads must be recalculated based on the new house layout — the old design cannot be reused. Fully enclosed houses require automated environmental control — manual temperature/ventilation management actually increases disease risk.
This article is based on publicly available industry data, retrofit case studies, and equipment manufacturer technical documentation. Specific retrofit plans should be developed based on on-site conditions.
If you are planning a poultry house retrofit and have questions about which systems to upgrade first — or need a customized phased implementation plan — please contact Silver Star Poultry Equipment Co., Ltd. Our technical team is ready to provide professional consultation and tailored solutions for your specific farm conditions.
Email: silverstarcentralasia@yandex.com
WhatsApp: +8615638193225