Cold Storage Installers — Cold Rooms, Blast & Freezer
An independent UK guide to cold rooms, blast freezers and refrigerated warehousing: natural-refrigerant plant, N+1 resilience and what drives running cost. Send an enquiry and we reply by email.
Refrigeration is 70-80% of the bill — and it never switches off
Cold storage is the most energy-intensive building type in UK industry: a refrigerated facility costs up to four times more per square foot to run each year than an ambient warehouse, and refrigeration alone accounts for 70 to 80 per cent of the electricity bill. Getting the install right is therefore not just an engineering decision but the difference between a store that holds temperature reliably at a controlled running cost and one that loses stock, fails audits and burns money. A good cold storage installer designs the insulated envelope, sizes the refrigeration duty, selects a refrigerant that survives the HFC phase-down, and commissions the plant to the temperatures HACCP and BRCGS demand. With the GB F-gas quota tightening year on year and electricity the dominant operating cost, buyers now want efficient natural-refrigerant plant, N+1 resilience, and a route to cut the running bill, including offsetting the 24/7 load with on-site solar.
A refrigerated facility costs up to four times more per square foot to run each year than an ambient warehouse. The demand is flat, high and around the clock, with pull-down spikes after every intake, scheduled defrost cycles, and constant door and infiltration losses on a busy pick face.
- 24/7 near-constant base load — the plant never switches off
- Pull-down spikes drive heavy transient demand on blast duty
- Defrost cycles and door losses are the cheapest kW to save
- Frozen duty runs a lower COP (~1.5-2.2) than chilled (~2.5-3.5)
What drives the cost — and how to cut it
Temperature, capacity and cost by cold storage type
Indicative UK ranges for 2025-26. Plant is sized on refrigeration duty (kW of cooling), not floor area — these are indicative bands, firmed up by the survey of the installer you appoint.
| Temperature | Capacity | Install cost | |
|---|---|---|---|
| Walk-in Cold Rooms | 0 to +5°C chilled; -18 to -25°C freezer variants | 6 to 150 m³ (a few pallets to a small store room) | £4,000 to £30,000 |
| Blast Freezers & Blast Chillers | -30 to -40°C air-off for blast freezing; blast chillers pull +70°C to +3°C in 90 minutes | 20kg to 2,000kg product per cycle | £15,000 to £120,000 |
| Refrigerated Warehousing & Cold Stores | chilled 0 to +5°C; frozen -18 to -25°C | 500 to 30,000+ pallet spaces | £500,000 to £10m |
| Modular & Containerised Cold Storage | -25 to +25°C selectable per unit | 28 to 67 m³ per 20ft or 40ft unit; bankable into larger arrays | £8,000 to £45,000 per unit |
| Controlled Atmosphere (CA) Storage | 0 to +4°C with controlled oxygen, carbon dioxide and nitrogen levels | up to 5,000+ pallet spaces per sealed CA room | £150,000 to £2m |
Five kinds of cold storage and how they differ
From a walk-in chiller to a 30,000-pallet frozen store. Each has its own sizing, refrigerant and compliance profile.
Most common Walk-in Cold Rooms
0 to +5°C chilled. £4,000 to £30,000.
Blast Freezers & Blast Chillers
-30 to -40°C air-off for blast freezing. £15,000 to £120,000.
Refrigerated Warehousing & Cold Stores
chilled 0 to +5°C. £500,000 to £10m.
Modular & Containerised Cold Storage
-25 to +25°C selectable per unit. £8,000 to £45,000 per unit.
Controlled Atmosphere (CA) Storage
0 to +4°C with controlled oxygen, carbon dioxide and nitrogen levels. £150,000 to £2m.
Why natural-refrigerant plant cuts the running bill on a frozen store
Many frozen stores still run ageing R404A plant. Replacing it with efficient natural-refrigerant plant outside the HFC phase-down, validated temperature mapping for BRCGS, and N+1 resilience to protect the stock can cut refrigeration energy, which is the single largest cost on site. On-site solar can offset a further slice of the 24/7 load; get a separate solar quote if that interests you. Plant spend may qualify for capital allowances, so confirm treatment with your accountant.
From survey to commissioned, validated store
How a typical installation runs: a good installer sizes on your loads and product, not a catalogue guess. These steps describe what a good installer does once you appoint one; this site does not install, survey or quote.
- 01Week 1-2
Survey loads & product
The installer reviews your throughput, product temperatures, half-hourly meter data and site constraints, then calculates the refrigeration duty in kW.
- 02Week 2-6
Design plant & envelope
The installer designs the insulated PIR envelope, sizes the plant to N+1, and selects a refrigerant that survives the F-gas phase-down (CO2, R290 or ammonia).
- 03Weeks / months by scale
Install PIR panels + plant
The installer builds the vapour-sealed envelope, installs condensing plant and evaporators, and fits doors, strip curtains and rapid-action doors to cut infiltration.
- 04Handover
Commission + temperature map
The store is pulled down, temperature mapping is validated with calibrated probes, alarms are set, and F-gas leak checking and records for BRCGS are handed over.
F-gas, food-safety and the funding that pays for it
Refrigeration is the dominant cost on a cold-chain site, so the money is made or lost on plant efficiency, envelope tightness and door discipline — not the sticker price of the panels. A good installer designs every store around the standards your customers and auditors demand.
New plant is specified on natural refrigerants that sit outside the GB F-gas HFC phase-down (a 79% cut in HFC supply by 2030 against the 2009 to 2012 average): CO2 (R744) transcritical, R290 or ammonia. Stores are commissioned with validated temperature mapping, calibrated probes and alarms so they are HACCP and BRCGS audit-ready from handover. Plant spend may qualify for 100% Annual Investment Allowance or Full Expensing (companies only, for new main-rate plant) — the IETF grant is closed to new applications since the 2025 Spending Review. Confirm the treatment of any plant spend with your accountant. To cut the 24/7 running cost further, get a separate quote for rooftop solar sized against your half-hourly load.
- F-gas company certification (REFCOM) — a legal requirement to work the circuit, so check your installer holds it
- HACCP & BRCGS temperature mapping, validation and alarms
- 100% Annual Investment Allowance (up to the annual limit) or Full Expensing (companies only, for new main-rate plant) may apply to new plant; confirm with your accountant
- Solar offset for the 24/7 load, quoted separately
Questions cold-chain buyers actually ask
Straight answers on temperature bands, running cost, refrigerant choice, redundancy and audits.
What temperature should my cold store run at?
Chilled storage typically runs 0 to +5°C, frozen storage -18 to -25°C, and blast freezing uses air as cold as -30 to -40°C to pull product cores down fast. The right setpoint depends on the product and your HACCP plan; a good installer sets and validates it with calibrated probes and temperature mapping so the store is audit-ready.
How much does a cold room or cold store cost to install in the UK?
A small walk-in chiller starts around £4,000, medium commercial rooms run £8,000 to £20,000, and walk-in freezers £6,000 to £25,000+, with £1,000 to £5,000 more for groundwork, drainage and power. Full design-and-build refrigerated warehouses run from £500,000 into the millions depending on pallet capacity and plant.
What does it cost to run a cold store each year?
Refrigeration is the dominant cost, 70 to 80 per cent of the electricity bill, and a refrigerated facility costs up to four times more per square foot to run than an ambient warehouse. Efficient plant, a tight insulated envelope, door discipline and offsetting the load with solar are the four biggest levers on that figure.
Should I choose a CO2, ammonia, R290 or HFC system?
For new stores, installers typically design around natural refrigerants that sit outside the HFC phase-down: CO2 (R744) transcritical for most chilled and frozen duties, R290 (propane) for smaller packaged plant, and ammonia (R717) for the largest industrial stores. These avoid future refrigerant-scarcity costs; transcritical CO2 plant can cut energy use against R404A, with the saving depending on site and duty.
Will the installation meet HACCP and BRCGS requirements?
It can, if the installer specifies it. Food-grade stores are built to hygienic standards and a good installer commissions them with validated temperature mapping, calibrated probes and alarms, so the store is auditable from handover. HACCP-critical steps such as blast-freeze pull-down are validated with recorded times and core temperatures.
How long does a cold store installation take?
A walk-in cold room is usually a few days to a couple of weeks. A full design-and-build refrigerated warehouse or CA store runs several months from survey through envelope, plant, commissioning and validation. Modular containerised units can be deployed in days where speed matters.
Cold storage installation across the UK
Click any area for local demand context and the industrial areas covered in each location guide.
Choosing between installers? The guide to choosing a cold room installer includes a free tender sheet builder and a quote comparison table, and the F-gas rules for cold rooms explain the leak-check and record duties that come with the plant.
Send your cold storage enquiry
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This site is an independent guide published by SEO Dons Ltd. Send the form and we reply by email. No installer has been vetted by this site, so check any contractor's F-gas certification yourself.