Refrigerated & Isothermal Body Kits: Cold Chain on 3.5–7.5t Chassis

Cold chain distribution is migrating from heavy trucks to 3.5–7.5t LCVs. Pharmacy logistics, food service and grocery last-mile all want smaller refrigerated vehicles closer to the customer. Here's what to know before speccing an isothermal or refrigerated body. Insulation class follows the cargo Chilled duty (0…+7°C): standard isothermal panels handle most food service and grocery work. Frozen duty (−20°C): requires reinforced insulation thickness and higher-spec door sealing. Don't buy frozen-class insulation "for flexibility" — you pay for it twice, in price and payload. The door is the weak point Field failures in refrigerated bodies are overwhelmingly door-related: worn gaskets, warped frames, damaged sealing surfaces. Spec priorities: Multi-lip gasket profiles, replaceable without panel work Rear frame stiffness — a flexing frame breaks any gasket Strip curtains for multi-drop operations, which halve air exchange per opening Payload: insulation costs, aluminium recovers Insulated walls are heavier than dry freight walls — on a 3.5t chassis this is the central trade-off. Aluminium-framed sandwich construction claws a meaningful share of that weight back versus steel-framed alternatives, which is why aluminium construction dominates the segment. Refrigeration on electric chassis On diesel chassis, the fridge unit traditionally runs off the engine. On an eSprinter, E-Transit or eDaily, the fridge draws from the traction battery or a dedicated pack — and every kWh it consumes is range you don't drive. Rules of thumb: Electric standby operation (plug-in pre-cooling at the depot) is the single biggest range saver. Better insulation directly reduces fridge duty cycle — the insulation spec matters MORE on EVs. Size the unit for the route profile, not for the worst theoretical day. ATP in one paragraph For international transport of perishable foodstuffs, ATP certification classifies the body (IN/IR classes) and the thermal appliance. Domestic operations often don't formally require it — but leasing companies and large food logistics clients increasingly demand ATP-class construction anyway, because it protects residual value. Assembly levels Refrigerated bodies are the one category where Kit-Go generally recommends PAS or FAS over CKD: panel joint quality determines thermal performance, and factory-made joints are consistently better than field-made ones. Isothermal and refrigerated kits for all major LCV chassis: kit-go.com/products — or office@kit-go.com for a spec consultation.