If you grow apples in Swat, dates in Khairpur, kinnow in Sargodha, or mangoes in Multan and Mirpurkhas — Controlled Atmosphere (CA) storage is the technology that turns your harvest from a one-month gamble into an eight-month earning window. Pakistani fruit growers lose 30–40% of their crop to post-harvest spoilage every season, and most of what survives reaches the mandi inside a four-week window when supply is at its peak and prices are at their floor. CA storage solves both problems at once. This is a working guide for Pakistani growers, exporters, and agribusiness investors evaluating CA as a project.
What CA storage actually is
A Controlled Atmosphere store is a gas-tight cold room in which the internal atmosphere — oxygen, carbon dioxide, nitrogen, and humidity — is precisely regulated alongside temperature. Fresh fruit and vegetables continue to respire after harvest, consuming oxygen, releasing CO₂, and ripening toward senescence. By dropping oxygen from the atmospheric 21% to as low as 1.5–2.5%, raising CO₂ slightly, and holding temperature at +0.5 to +1 °C with 90–95% relative humidity, CA storage slows that respiration to a crawl. Apples that would last 4 weeks in plain cold storage last 8 to 9 months in CA. Dates, citrus, mangoes, pears, and stone fruit each have their own optimum gas mix — and each one extends shelf life dramatically.
For Pakistani growers, this changes the entire commercial proposition. The September apple glut in Lahore mandis becomes the March CA-stored premium. The October-December date harvest extends into Ramzan demand windows. Kinnow that would be dumped at Rs 60/kg in February becomes Rs 140/kg fruit in May. The investment case is built on those price differentials, not just on reduced spoilage.
Gas mix targets for Pakistani crops
Each crop has a tested optimum atmosphere. The wrong mix can cause fermentation off-flavours, internal browning, or chilling injury — so commissioning a CA store needs varietal data, not just a generic catalogue specification.
- Apples (Royal Gala, Gala Must, Red Delicious, Golden Delicious, Kashmiri): 1.5–2.5% O₂, 1–3% CO₂, +0.5 to +1.5 °C, 90–95% RH. Granny Smith varieties tolerate slightly higher CO₂ (3–5%).
- Pears (Bartlett, Bosc): 1.5–2.0% O₂, 0.5–1% CO₂, −0.5 to +0.5 °C.
- Kinnow and other citrus: 5–10% O₂, 0–5% CO₂, +4 to +8 °C, 90% RH. Lower oxygen than this triggers fermentation in citrus.
- Dates (Aseel, Dhakki, Begum Jangi at rutab and tamr stages): 3–5% O₂, 5–10% CO₂, +0.5 to +2 °C. Different stages of date maturity want different conditions.
- Mangoes (Sindhri, Chaunsa, Anwar Ratol, Langra): 3–5% O₂, 5–8% CO₂, +12 to +13 °C. Mangoes are chilling-injury-sensitive — colder is not better.
- Stone fruit (peach, apricot, plum): 1–2% O₂, 3–5% CO₂, −0.5 to 0 °C.
- Pomegranate (Kandhari, Bedana): 3–5% O₂, 5–10% CO₂, +5 to +7 °C.
Specific cultivars and growing-region differences require fine-tuning during commissioning. We work from the grower's varietal mix and adjust over the first 3–6 weeks of operation against quality testing.
Inside a CA store — the engineering
A CA store builds on the same envelope as a high-performance cold room — PIR sandwich panels, gas-tight insulated doors, and a precisely-controlled refrigeration plant. To that base, four additional systems are added:
- Nitrogen generator (PSA or membrane) — produces nitrogen on demand to displace oxygen as the fruit and air are sealed in.
- CO₂ scrubber — typically activated carbon or molecular sieve technology that removes excess CO₂ produced by fruit respiration, holding the target level.
- Oxygen and CO₂ sensors with feedback control — continuously measuring atmosphere and triggering nitrogen injection or scrubber operation to hold setpoint.
- Pressure-relief valves and gas-tight seals — handling the small pressure variations that come with temperature changes inside a sealed room.
Tighter temperature control is also required: ±0.5 °C variation rather than the ±2 °C accepted on commercial cold storage. The evaporator coils run at smaller temperature differential to maintain the high humidity (90–95% RH) that fruit needs without excessive dehumidification. Power-quality and uptime are non-negotiable: a CA store that loses gas-tight integrity or atmosphere control mid-cycle can lose months of stored product to a few hours of failure.
The economics — what CA stores earn in Pakistan
Construction cost in 2026 PKR for turnkey CA stores (excluding civil works):
- Medium-sized CA store (500–2,500 m³): PKR 50,000–75,000 per m³.
- Large CA facility (5,000+ m³ split into multiple gas-tight cells): PKR 45,000–60,000 per m³.
- Premium with fully-redundant atmosphere control and IoT monitoring: 10–15% above base.
The revenue case for a typical KPK apple grower's 2,500 m³ CA store holding Royal Gala:
- Capacity: roughly 1,800 tonnes of apples (at 720 kg/m³ packed density).
- September wholesale price (Lahore mandi): Rs 95–125 per kg.
- March-April wholesale price for stored Royal Gala: Rs 220–290 per kg.
- Gross spread per kg: Rs 100–165, conservatively.
- Annual gross uplift: roughly Rs 18–30 crore on full capacity utilisation.
- CA store capex: roughly Rs 12–18 crore turnkey.
- Operating cost (electricity, gas, labour): roughly Rs 1.5–2.5 crore annually.
- Effective payback: 18–30 months, before accounting for reduced post-harvest losses.
Date and citrus economics differ in detail but follow the same logic — the price spread between harvest peak and off-season window pays for the asset multiple times over its 25-year life.
Where to build CA stores in Pakistan
Demand and crop concentration both drive CA siting:
- KPK — Swat, Kalam, Mansehra, Hazara division, Murree foothills — apple and stone-fruit CA at orchard or district consolidation level. The single biggest current opportunity.
- Sindh — Khairpur, Sukkur, Hyderabad, Tando Allahyar — date CA storage and mango cold storage. Premium varieties for Gulf, EU, and US markets are constrained by capacity.
- Punjab — Sargodha, Bhalwal — kinnow CA storage extending the citrus marketing window from December–February into May–June.
- Balochistan — Mastung, Kalat, Ziarat — apple, grape, and pomegranate CA. Capacity is minimal relative to harvest tonnage.
- South Punjab — Multan, Mirpurkhas (border belt), Bahawalpur — mango cold storage, transitioning toward CA for premium export grades.
- Karachi port consolidation hubs — for export-bound CA-stored fruit awaiting shipping.
For growers and cooperatives, the decision is whether to build a single farm-level CA store (typical 500–1,500 m³) or to invest into a regional district-level facility (5,000–15,000 m³ across multiple cells). Regional facilities have better unit economics but require shared governance — historically a challenge in Pakistani horticulture clusters but increasingly viable with PHDEC and provincial agriculture department support.
How to evaluate a CA project
Before committing capital, work through five questions:
- What crops, what varieties, what tonnage? Storage capacity and gas-mix design follow directly from the answer.
- What is the price spread between harvest and your target marketing window? Use 3–5 years of mandi data to project realistically; don't assume the highest historical spread.
- Who is your buyer at the off-season price point? Domestic mandi, modern retail, exporter, processor — each has different specs and payment terms.
- Where will the CA store sit? Orchard-level (lowest transport loss but smaller scale), district consolidation (better economics, requires logistics), or near port (export-focused, premium pricing).
- Capex source and tenure? Bank finance is increasingly available for cold-chain and CA infrastructure under SBP refinance schemes; KIBOR-linked rates have been workable for projects with strong off-take agreements.
Our CA atmosphere calculator sizes nitrogen generation and CO₂ scrubbing for your specific crop, capacity, and target gas mix. The CA stores page covers what we build, and our engineering team can deliver a sized concept design and indicative budget within 72 hours of receiving a one-page brief.
The bottom line for Pakistani growers
Pakistan's horticulture sector — apple, date, kinnow, mango, stone fruit, pomegranate, grape — has the harvest tonnage and the export demand to be a genuinely large business. The constraint is not what the country grows. The constraint is what the country can store at the right temperature and atmosphere long enough to reach the high-value windows. CA storage is the single technology that closes that gap, and the economics work at almost any scale from a 500 m³ orchard-level store to a 15,000 m³ district facility.
If you're a grower, exporter, cooperative, or investor evaluating a CA project, talk to our engineering team. We've delivered CA stores across Pakistan and we can tell you within a week whether your project's economics work — including conservative price-spread assumptions and full PKR cost breakdowns.