Choosing the wrong cold storage contractor does not show up straight away. The store still runs, it still gets cold, and the problem surfaces gradually — through the electricity bill, through the repair call-outs, through a consignment downgraded on quality. The seven questions below separate a real engineering firm from an assembly outfit. Ask them before you sign, not after handover.
1. How was the heat load for my store calculated?
This is the question that separates them most clearly. A real engineering firm will ask you questions back: the operating temperature range, how much product comes in each day, the temperature of that product on arrival, how often the doors open, the site conditions.
An outfit that only sells equipment will answer immediately from the floor area — "a 100 m² store needs this machine". That kind of estimate ignores the very factors that determine heat load, and it is the most common reason a store ends up under-powered or over-powered.
2. Do you fabricate your own equipment or buy it in?
Not every contractor needs to manufacture, but the answer tells you a lot: a firm that fabricates its own pressure vessels will have the fabrication and inspection records to hand, and can build to the actual project specification rather than forcing the project to fit equipment already in the warehouse.
If they buy it in, ask the follow-up: where does the equipment documentation come from, how long does it take to arrive, and who is liable when a unit fails.
3. What does this quotation include, and what does it exclude?
Two quotations far apart are usually not a case of one being cheaper — they are a case of different scopes of work. Ask for an explicit list: floor treatment, power supply and control cabinets, condensate drainage, door heater wires, delivery to site, inspection costs, commissioning and documentation handover.
See the detail in the article on the items most often left out of a cold storage quotation.
4. Have you built anything for a business in my sector?
A seafood store, a produce store and a pharmaceutical store are three fundamentally different problems, not simply different temperatures. Experience in your specific sector matters more than the total number of projects delivered.
Ask for specifics: the scale, the temperature range, the equipment used, and whether you can contact that client.
5. What is the projected electricity cost of this design?
This is the question fewest people ask and the one with the largest effect on total cost. Electricity accounts for most of a cold store's lifecycle cost, and it is decided at the moment you choose the insulation thickness, the equipment and the heat rejection design.
A serious contractor will be able to explain why that configuration was chosen and how it affects the electricity bill. A contractor trying to win on price alone will avoid the question.
6. What happens after handover — warranty and maintenance?
A cold store runs continuously, so a breakdown is a question of when, not whether. Settle it up front: the warranty scope, the response time when something fails, whether there is a scheduled maintenance package, and where replacement parts come from.
With less common imported equipment, the wait for parts can run into weeks — and a store full of product cannot wait.
7. What does the handover documentation contain?
A complete set of documentation should include: the process and installation drawings, the control wiring diagrams, the equipment schedule with specifications, the pressure vessel inspection records, the operating instructions and the maintenance schedule.
For a store serving export food or pharmaceuticals, this documentation is also what gets you through audits. Ask about it at the outset — don't go looking for it at the moment you need it.
Three warning signs worth a second look
- A quotation issued before the site has been surveyed. Without a heat load calculation, that figure is only an estimate based on floor area.
- They cannot explain why that configuration was chosen. A sign of selling equipment off the shelf rather than designing to the problem.
- Far cheaper than the going rate, with no reason given. The difference always comes from somewhere — usually panel thickness, equipment grade, or scope of work quietly cut.
How to compare quotations fairly
Bring the quotations onto the same configuration before comparing: same temperature range, same panel thickness, same equipment grade and origin, same scope of work. Only then do the numbers mean anything.
See more the factors that determine cold storage cost and building your own versus renting storage.
Frequently asked questions about choosing a cold storage contractor
Which question separates contractors most clearly?
Ask how the store's heat load was calculated. A real engineering firm will ask you back about the temperature range, how much product comes in each day, the temperature of that product on arrival and how often the doors open. An outfit that only sells equipment will answer immediately from the floor area.
Why is a quotation that is far cheaper a cause for suspicion?
Because the difference always comes from somewhere — usually thinner panels, a different equipment grade, or scope of work quietly cut. Ask for an explicit list of what the quotation includes and excludes.
Should you favour a contractor that fabricates its own equipment?
Not essential, but a firm that fabricates its own equipment has the fabrication and inspection records to hand, and can build to the actual project specification rather than forcing the project to fit equipment already in stock. If the contractor buys equipment in, ask where its documentation comes from.
What should the handover documentation contain?
The process and installation drawings, the control wiring diagrams, the equipment schedule with specifications, the pressure vessel inspection records, the operating instructions and the maintenance schedule.
How do you compare several quotations fairly?
Bring them onto the same configuration before comparing: same temperature range, same panel thickness, same equipment grade and origin, same scope of work. Comparing two quotations with different scopes is comparing two different things.
Checking these criteria against a specific cold storage supplier will get you there faster than reading theory.
Related pages
- The items most often left out of a cold storage quotation
- 5 cold store design mistakes that cost for years
- The factors that determine cold store investment cost
- Building your own cold store or renting storage
- Cold storage contractor services
- Industrial cold storage – turnkey design and installation
Kỹ sư Nguyễn Toàn Thịnh (Giám đốc Kỹ thuật)
Hơn 18 năm kinh nghiệm thực chiến chỉ đạo tư vấn thiết kế và thi công hệ thống lạnh công nghiệp nặng, kho tự động ASRS và cấp đông IQF qua hơn 29 đại dự án quốc gia.
