Knowledge / Understanding the technology
When Is a VIP Insulated Shipper Worthwhile?
Vacuum insulation panels can provide high insulation performance with thin walls. A VIP insulated shipper may therefore require less space or carry more goods within the same external dimensions. Whether this is worthwhile is established by comparing fully loaded packaging systems suitable for the same shipment.
Practical guidance
Check whether a VIP shipper needs less space and saves shipping costs while providing the same product protection.
THERMOCON exploded view of the Slim Line with panels, cooling elements and product compartment.
In this guide
- VIP provides insulation; cooling elements absorb heat
- When a comparison with VIP is worthwhile
- Compare VIP, EPS and paper for the same shipment
- Heat also enters through edges and joints
- Worked example: how thinner walls change external dimensions
- Protect panels and inspect them before reuse
- Request these documents from the supplier
VIP provides insulation; cooling elements absorb heat
A vacuum insulation panel (VIP) reduces heat transfer through the wall. It does not generate cold. In a passive shipper, water or PCM absorbs or releases heat; the panels limit exchange with the surroundings.
Alongside the panels, joints, the lid, edges and protective layers affect insulation. The property value of a single panel therefore does not describe temperature maintenance in the finished shipper.
When a comparison with VIP is worthwhile
- Limited space: with thinner walls, does the usable product compartment accommodate your load?
- Severe temperature exposure or long transport: does the complete configuration meet the required test profile and duration?
- High freight costs: is the chargeable volume or weight of the finished shipment reduced?
- Regular returns: can the system designed for reuse be used again after inspection and refurbishment?
Another insulation construction may also meet the same product requirements. Compare test reports and dimensions before committing to a material. The article on PCM in thermal packaging explains the selection of cooling elements.
Compare VIP, EPS and paper for the same shipment
Use the same temperature limits, payloads, initial temperatures, ambient temperatures and durations for all variants. Then compare the finished configurations, including cooling elements, protective layers and outer carton.
A thinner insulation wall saves freight volume only if the external dimensions of the complete packaging also decrease. If the VIP system requires additional protective parts, include these. Repeated use adds the return and inspection tasks described in the single-use versus reusable comparison.
Heat also enters through edges and joints
The vacuum reduces heat transfer through the gas in the panel. However, heat can still flow through panel edges, connections and the lid joint. These additional heat paths affect the finished packaging.
For a simple flat insulation layer, approximately: heat flow rate = thermal conductivity × area × temperature difference / thickness. A shipper adds geometry, joints and further components. An improved material property therefore cannot be converted into a proportionally longer transport duration.
Request the test report for the complete configuration. Also clarify how the sensitive panels are protected during packing, transport and opening.
Worked example: how thinner walls change external dimensions
Geometric example, not a product specification: an idealised internal space of 30 × 30 × 30 cm has a volume of 27 litres. With a 5 cm wall thickness on every side, the external dimensions are 40 × 40 × 40 cm, or 64 litres. With 2 cm walls, they are 34 × 34 × 34 cm, approximately 39.3 litres.
The example shows how wall thickness affects external volume. It does not demonstrate equal insulation performance for the two constructions. Outer cartons, protective parts and cooling elements have not been included.
For a specific quotation, ask for the product compartment dimensions after all components are inserted and the final external dimensions. Together with freight pricing and tested conditions of use, these allow you to assess whether the more compact solution saves costs.
Protect panels and inspect them before reuse
The barrier envelope maintains the vacuum inside the panel. Damage can reduce insulation performance. Panels must therefore not be cut, punctured or used as fixing surfaces without authorisation.
Clarify with the supplier how returned systems are inspected and when parts must be replaced. A clean outer surface does not demonstrate unchanged insulation performance; not every loss of vacuum is visible on inspection alone.
Include inspections and spare parts in the cost-per-shipment calculation as well.
Request these documents from the supplier
- Test report with all components and the tested conditions of use.
- External dimensions, gross weight and usable dimensions of the product compartment.
- Packing and handling instructions, including protection of the panels.
- For reuse: inspection procedures, replacement rules and permitted repeated use.
THERMOCON Slim Line combines VIP and PCM. Use the available configurations to select a variant for your payload and temperature requirements; stated durations apply under the specified test conditions.
Compare Slim Line configurations
Compare Slim Line configurations with your payload and shipping duration. Freight comparisons use the external dimensions and weight of the fully loaded packaging.