Refrigerated vehicles for Pakistan's cold chain — PIR truck bodies, Zanotti and Thermo King units.

Cold-chain integrity isn't held by a single building — it's held end-to-end. Manufacturer chiller, outbound dock, refrigerated trailer, inbound dock at the DC, racked cold storage, despatch dock, retail backstore. A break anywhere is a break everywhere. The refrigerated vehicle is the moving link, and it's where most cold-chain failures actually happen — not because reefers are unreliable, but because they're routinely sized at "what was on offer" rather than what the route profile demands.

Izhar Foster builds the truck body and specifies the refrigeration unit as a single engineering scope. The body is PIR sandwich panel — the same envelope system in our cold stores, with the lighter weight and rigidity profile reefer applications need. The unit is selected from the Zanotti and Thermo King catalogues based on truck size, target band, ambient design point, and route. Two named technology partners. One supplier accountable.

Why PIR for the truck body

The reefer body is structural insulation that spends its life cycling temperature, vibrating, taking impact, and absorbing UV. Material choice is not cosmetic.

• Higher insulation per unit weight. PIR delivers a thermal conductivity of 0.022 W/m·K (BS EN 14509 aged) at densities of 40–45 kg/m³ — meaningfully better insulation per kilogram of body than PUR (0.024 W/m·K) or EPS (0.034 W/m·K). On a payload-constrained vehicle, every kilogram of insulation that doesn't translate to thermal performance is payload you don't carry.
• Fire class B1 (foam B2) per ASTM E84. PIR is self-extinguishing and char-forming. It does not propagate flame. It matters in a vehicle compartment carrying combustible cargo and operating in proximity to fuel and electrical loads.
• Dimensional stability under cycling. PIR's dimensional change is < 1% across the temperature swings a reefer body lives through. The panel does not pillow, sag, or open joints over years of cycling.
• Asbestos-free, low-water-absorbency (< 1% by volume). The body does not gain insulation-killing weight from washdown moisture or condensation.
• 50+ year material life. The body outlasts the chassis under it. PIR is not the limiting factor in vehicle replacement decisions.

The full PIR specification is documented on the PIR sandwich panels page. The same material flows through every cold envelope we build — store, vehicle body, processing room, ripening chamber.

Zanotti — the small-to-medium catalogue

Zanotti is Italian, branded in their own marketing as the "King of Cold", and our reference partner for the small-to-medium range of refrigerated vehicles. The Zanotti unit-by-truck-size matrix covers five product families:

Zanotti family	Position in the range	Typical application
Direct Drive Invisible	Smallest — undermount or hidden install	Light commercial vehicles, retail last-mile
Battery	Stand-alone battery-driven	Short-distance distribution where engine drive isn't preferred
Direct Drive Split	Compressor on engine, evaporator in body	Standard small-to-medium reefer trucks
Large Direct Drive Split	Higher capacity split unit	Larger reefer trucks, multi-drop frozen
Direct Drive Monoblock	Single-block compact unit	Compact installations where split layout isn't possible

Beyond the standard catalogue, Zanotti supplies special units, units for moving cold rooms, multi-temperature units, and trailer-class units for the largest reefer applications.

Thermo King T-Series — higher-capacity, diesel or electric

For higher-capacity applications and longer-haul reefer work, the Thermo King T-Series is our reference unit. Manufacturer-specified heat capacity is 6,220 W. Drive options are diesel (independent compressor on the truck) and electric (3-phase mains shore-power mode for parked/yarded vehicles). Many fleets specify dual-mode units to operate diesel on-route and electric on-depot — overnight power costs less than diesel idle, and the noise envelope at the depot is lower.

Multi-temperature reefer bodies

A multi-temperature reefer divides one body into two or more independently-controlled compartments — typically frozen plus chilled, or two chilled bands at different setpoints. This is a high-leverage configuration for distribution operators serving mixed retail (frozen ice cream + chilled dairy in one drop, for example). Engineering decisions that matter:

• Insulated bulkheads with heated frames. A bulkhead between a frozen and chilled zone faces a 25–30 K differential and will frost on the cold side if the frame is not heated. We specify the same heated-frame system used in our insulated doors for cold stores.
• Per-zone evaporator + shared condenser where appropriate. Each zone has its own evaporator sized for its own load and band. Condensing capacity can be shared between zones at appropriate ratios.
• Bulkhead position and mobility. Some operators specify movable bulkheads to flex the frozen-to-chilled split through the day. Movable bulkheads sacrifice some thermal performance for flexibility.

Where reefer transport sits in the cold chain

The vehicle is the link between every other cold-chain element we build. Pharma cold rooms at +2/+8 °C feed validated outbound trailers to distribution. Dairy finished-goods warehouses despatch chilled and frozen reefers to retail. Halal meat and poultry plants run blast-frozen exports under multi-temperature reefer scope. Mango and kinnow from fruit cold stores ship in pre-cooled chilled reefers. Ripened bananas reach retail on +13/+14 °C reefers. The vehicle is what makes the rest of the system mean anything.

Frequently asked questions

What refrigeration units does Izhar Foster install on truck bodies?

Two named technology partners: Zanotti (Italy) — the brochure-stated "King of Cold" — across the small-to-medium range with Direct Drive Invisible, Battery, Direct Drive Split, Large Direct Drive Split, and Direct Drive Monoblock units; and Thermo King (USA) T-Series for higher-capacity applications, with diesel and electric drive options. Special units, multi-temperature units, units for moving cold rooms, and trailer-class units are all available.

What is the heat capacity of the Thermo King T-Series?

The Thermo King T-Series specified by Izhar Foster delivers 6,220 W heat capacity per manufacturer specification, available in diesel-drive and electric-drive configurations. Final selection depends on truck size, target temperature, ambient design point, and route profile.

What's the truck body construction on an Izhar Foster reefer?

Truck bodies are built in PIR sandwich panel — the same panel system used in our cold stores, specified for the lighter weight and structural rigidity required on a moving vehicle. PIR delivers higher thermal insulation per unit weight than PUR or EPS, fire class B1 (foam B2) per ASTM E84, and dimensional stability across the temperature swings a reefer body experiences.

Can Izhar Foster supply multi-temperature reefer trucks?

Yes. Multi-temperature reefer trucks divide the body into two or more independently-controlled compartments — typical configurations are frozen plus chilled, or two chilled bands at different setpoints. Bulkheads are insulated panels with heated frames; refrigeration is sized per-zone with shared condensing capacity where appropriate.

Do Izhar Foster reefer units work on diesel and electric?

Yes. The Thermo King T-Series we specify offers both diesel and electric drive. Diesel-drive runs an independent compressor on the truck. Electric-drive (stand-by / shore-power mode) runs from a 3-phase mains connection while the truck is parked — useful for overnight depots and yard staging. Many fleets specify dual-mode units for operational flexibility.

What size truck bodies does Izhar Foster build?

From small light-commercial vehicles up through articulated trailers. The Zanotti unit-by-truck-size matrix in our scope covers Direct Drive Invisible (smallest), Battery, Direct Drive Split, Large Direct Drive Split, Direct Drive Monoblock (compact/medium), and trailer units (largest). Special units cover moving cold rooms and other one-off applications.