For commercial and industrial refrigeration projects (cold rooms, cold stores, process cooling) — not household fridges, home freezers or appliance repair. Results are planning estimates, not engineering design or safety advice; a qualified refrigeration engineer must confirm sizing before purchase.
Cold store heat load and insulation materials — buyer questions
Answers that accompany the cooling load and insulation panel calculators. Use them to check assumptions before you send a brief; final values come from the selected contractor's engineering.
Cold stores and heat load
What makes up the heat load of a cold store?
Transmission through walls, roof and floor; product load from cooling incoming goods; infiltration through door openings; and internal gains from lighting, people, forklifts, fans and defrost. A safety margin of roughly 10–20% is then added.
Which load component is usually largest?
In well-insulated distribution stores, infiltration and product load often dominate; in stores with thin panels or high ambient, transmission grows. The calculator shows each share so you can see where to act.
Why does design ambient matter so much?
Transmission load scales with the temperature difference, and condenser capacity falls as ambient rises. Capacity must be quoted at the site's design dry-bulb and humidity, not catalogue conditions.
How do door openings affect the load?
Each opening exchanges warm, humid air. Airlocks, rapid-roll doors, strip curtains and dock seals can cut infiltration substantially and reduce defrost frequency.
Is W/m³ a reliable sizing shortcut?
Only for a first check. Product throughput, entry temperature and door traffic vary too much; a room-by-room calculation is needed before an RFQ.
Why is a frozen store more demanding than a chilled one?
The temperature difference is larger, compressors work at lower suction pressure with lower efficiency, and floors need heave protection.
Insulation and building materials
PIR, PUR or mineral wool — which core should I choose?
PIR offers low conductivity (about 0.022 W/m·K) and better fire behaviour than PUR; PUR is slightly less insulating; mineral wool is non-combustible but needs more thickness. Fire rules and insurer requirements often decide.
What panel thickness is typical?
As a planning guide: about 60–80 mm for above-zero rooms, 100–125 mm for chilled or mild frozen, 150 mm for −18 to −25 °C in hot climates and 200 mm for deep-freeze. The calculator adjusts for core and ambient.
Does a frozen floor need special construction?
Yes. Below 0 °C the floor needs insulation, a vapour barrier and underfloor heating or ventilation to prevent frost heave.
Why are vapour barriers and joints critical?
Moisture migrating into the insulation freezes, degrades performance and damages panels. Sealed joints and continuous vapour barriers on the warm side are essential.
What should I specify for doors?
Insulated doors matched to room temperature, heated frames and gaskets for frozen rooms, and fast-acting doors or airlocks on high-traffic openings.
Which panel facings suit coastal or food sites?
Food-safe coated steel is standard; stainless or enhanced coatings are used for wash-down areas and corrosive coastal environments.
General engineering guidance, not a design or quotation. ColdMatch does not manufacture, install or guarantee equipment.
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