Short Summary
Choosing the right tunnel pasteuriser involves more than comparing machine prices or rated capacity. This guide covers the 9 key criteria to evaluate, including throughput, thermal and PU control, product and pack compatibility, energy and water use, site utilities, automation, hygienic design, line integration and total cost of ownership. It also includes practical RFQ questions, supplier red flags, evidence to request, a buyer scorecard and a final purchasing checklist to help beverage producers compare tunnel pasteuriser suppliers and select a machine that fits their production requirements, site and long-term operating costs.
Buying a tunnel pasteuriser (also searched as tunnel pasteurizer) is a big investment for any beverage producer. The ideal machine should deliver the necessary heat treatment while keeping pace with your actual production line speed. It must also keep water, energy, maintenance and downtime under control.
Quick answer: The best tunnel pasteuriser is not the largest or the cheapest machine. It is the one that can deliver your required pasteurisation performance at your actual line speed, pack size and product conditions, while keeping energy, water, maintenance and downtime under control.
What should you check before buying a tunnel pasteuriser?
- Required throughput
- Thermal profile and PU control
- Product and pack compatibility
- Energy and water use
- Site utilities
- Automation and process data
- Hygienic design and maintenance access
- Line integration, footprint and safety
- Total cost of ownership and supplier support
Use the RFQ checklist and the buyer scorecard in this guide to compare tunnel pasteuriser suppliers like for like.
Quick Answers
What is a tunnel pasteuriser? A tunnel pasteuriser is a continuous machine that heats, holds and cools sealed cans or bottles as they travel through controlled treatment zones. You will see two spellings: tunnel pasteuriser in Australia and the UK, and tunnel pasteurizer in the US. Both mean the same machine.
Is a tunnel pasteuriser right for my line? It suits producers who need to treat packed drinks nonstop at full line speed. Small or irregular runs may suit batch treatment better.
Is a tunnel pasteuriser better than flash pasteurisation? Neither is better in every case. Tunnel pasteurisation treats the packed product. Flash pasteurisation treats the liquid before filling.
What is a PU in pasteurisation? A pasteurisation unit (PU) measures heat treatment. For beer, one PU is commonly defined as the effect of holding the product at 60°C for one minute.
How much does a tunnel pasteuriser cost? There is no fair standard price. Cost depends on capacity, pack type, heating method, automation, deck layout and what the quote includes.
Quick Comparison: What Should You Focus On?
| If you care most about… | Prioritise | Ask for |
|---|---|---|
| Maximum throughput | CPM and deck layout | Tested capacity at your largest pack |
| Consistent treatment | Thermal profile and PU control | Process and PU records |
| Lower running costs | Energy and water use | Use figures at your actual speed |
| Many pack formats | Pack compatibility | Reference sites running similar packs |
| Limited floor space | Double deck layout | A full general arrangement (GA) drawing |
| Easy maintenance | Hygienic design | A live access and cleaning demonstration |
| Low long-term risk | TCO and support | Warranty, service agreement (SLA) and spare-parts data |
Is a Tunnel Pasteuriser Right for Your Beverage Line?
Tunnel pasteurisers are continuous thermal-processing systems used to treat sealed beverage containers after filling. They use a series of heating, holding and cooling zones to control how much heat the product receives. This cuts the risk of spoilage and helps the drink last longer.
Tunnel pasteurisation is common for packed drinks such as beer, cider, kombucha and some RTD (ready-to-drink) and non-alcoholic beverages. It is used where treatment must keep up with the filling line. For background on how heat treatment affects storage life, see our guide to pasteurisation and beverage shelf life
Here is how a tunnel pasteuriser works. Cans or bottles ride a conveyor through a long chamber. Water sprays warm them in stages. The drink is held at the target heat for a set time. Then it is cooled before it leaves the machine.
Not every producer needs one. A small brewery that packs a few batches a week may do better with another method. Ask yourself: do you need to treat packed product nonstop, at your full line speed? If yes, a tunnel pasteuriser is worth a close look.
Tunnel vs Batch vs Flash Pasteurisation
| Method | How it works | Best for | Watch out for |
|---|---|---|---|
| Tunnel | Sealed packs move nonstop through heating, holding and cooling zones | High-volume packed drinks | Needs floor space and a good fit with your line |
| Batch | Product is treated in separate lots | Small or changing runs | Slower at high volume |
| Flash | The liquid is heated fast, then cooled, before filling | Drinks that can be treated before filling | The filler must be very clean |
The key difference is timing. A tunnel pasteuriser treats the drink after it is sealed. Flash treats the liquid before the filler. So any microorganisms that get in during filling are not treated.
9 Criteria for Choosing a Tunnel Pasteuriser
1. Throughput
Size the tunnel pasteuriser to your real output, measured in containers per minute (CPM). Base it on your busy-season peak, your largest pack and your growth over the next three to five years.
- Too small: the pasteuriser becomes the bottleneck and slows your filler.
- Too big: you pay for capacity you don’t use, and you heat and pump extra water every shift.
The mistake to avoid: buying for your average week instead of your peak week.
Red flag: the supplier quotes a capacity figure without naming the pack size.
2. Thermal Profile and PU Control
The thermal profile is the path your drink’s temperature follows through the machine. It should heat up gradually, hold steady and cool in a controlled way. Dwell time is how long the drink spends in each zone.
Too little heat raises spoilage risk. Too much can dull flavour, affect carbonation and stress the pack. Sudden temperature jumps can also crack glass.
The supplier should design the process around your validated treatment target, not a standard setting. Needs vary a lot by product. For instance, the Brewers Association points out that low- and no-alcohol beers typically require more extensive processing than standard-strength beers.
What we’d ask a supplier: How do you control temperature and dwell time in each zone? Can you show PU records from a similar product?
Red flag: PU performance is discussed without any real process data.
3. Product and Pack Compatibility
Your tunnel pasteuriser must suit both the pack and the drink.
| Pack factors | Product factors |
|---|---|
| Aluminium cans | Acidity |
| Glass bottles | Sugar level |
| PET bottles | Alcohol level |
| Pack sizes and mixed formats | Microbiological risk |
| Carbonation (pressure rises as the drink heats) | Target shelf life |
A 375 mL can and a 750 mL glass bottle heat and cool at different speeds. A low-alcohol RTD may need a different process from a strong beer. You can’t specify a tunnel pasteuriser until you know both.
Red flag: no reference site is available for a similar product or pack.
4. Energy and Water Use
A tunnel pasteuriser uses several spray zones, pumps and heat sources. Together, they make up a large share of running costs.
What is pasteurizer energy recovery? It means reusing heat that would otherwise be wasted. Warm water from a cooling zone helps preheat cold packs coming in. Those cold packs, in turn, help cool the water. So the machine needs less new heating and cooling.
The evidence shows why this matters. A 2026 study of an industrial tunnel pasteurizer found that only about 40% of the heat supplied actually reached the product. An earlier study reported that reusing heated water between chambers cut heating energy and water use significantly. Results vary by design. So always ask for figures for your own line.
What we’d ask a supplier: How much electricity, water, steam and cooling will it use at our real line speed?
Red flag: energy use is described as “highly efficient” with no kWh or litre figures.
5. Site Utilities
A tunnel pasteuriser is usually heated in one of three ways:
- Steam: suits sites that already have a boiler.
- Hot-water tank systems: keep a store of hot water ready to use.
- On-demand hot water: heats water only as the process needs it.
The right choice depends on the services you already have, your line speed, your space and your team’s skills. A tunnel pasteuriser that needs steam you don’t have can add a large hidden cost.
Site utilities checklist:
- Electrical load and three-phase supply
- Steam and boiler capacity
- Cooling water and chilled water
- Wastewater and drainage
- Pack exit temperature (affects labelling and packing)
- Heat exchangers, pumps and controls: included or extra?
Red flag: installation and utility work are left out of the quote.
6. Automation and Process Data
In a tunnel pasteuriser, a PU control system tracks how much heat each pack actually receives. It then adjusts the process to keep the treatment on target. This matters because lines stop and start. A filler jam can leave packs sitting in a hot zone too long, which can give beer a cooked taste. A good system spots this and reacts, for example by changing zone temperatures. You can learn more about how this is done in our guide to PU control and process monitoring
Look for:
- PLC (programmable logic controller) control
- Temperature monitoring in every zone
- Variable conveyor speed
- Saved recipes for each product
- Alarms for temperature errors, low water and conveyor jams
- Exportable PU and treatment records for QA audits
- Remote diagnostics and local support for the controls
Red flag: the supplier can’t explain what the machine does when the line stops.
7. Hygienic Design and Maintenance
A tunnel pasteuriser that is hard to clean or service will cause problems, however smart its controls are. EHEDG GL 8 Hygienic Design Principles (fourth edition, December 2025) gives a useful checklist for judging hygienic design in food equipment.
Check the stainless steel, drainage (no pooling water), access panels, spray bars and nozzles, water filters, pumps and weld quality. Blocked nozzles can cause uneven heating. Dirty water can build up scale and biofilm.
A practical example: a spray nozzle in the middle of the tunnel blocks on a Monday morning. On one machine, a technician opens a side panel and pulls the spray bar in minutes. On another, they must remove guards and kneel inside a wet chamber. Both machines may look the same in the brochure.
What we’d ask a supplier: Can you show us, on a real machine, how staff clean the filters and nozzles, and how long it takes?
Red flag: you are shown the outside panels but not the service access.
8. Line Integration, Footprint and Safety
The tunnel is only one part of the production cell. A tunnel pasteuriser for cans, for example, must link smoothly with a fast can filler upstream and a packer downstream.
Plan for infeed and outfeed conveyors, transfer points, utility connections, and room for operators, cleaning and repairs. A poor fit can cause pile-ups, fallen packs, conveyor faults and line stops.
Key takeaway: measure the whole production cell, not just the tunnel.
Red flag: the layout drawing shows the tunnel but not the maintenance clearances around it.
9. TCO and Supplier Support
Tunnel pasteuriser price is only one part of the cost. What you pay over the machine’s life matters more (see the TCO section below). Support decides how long a breakdown lasts.
Compare installation, commissioning (start-up), training, warranty, response times, local spare parts and room to grow. One supplier may include heat exchangers, controls and commissioning. Another may list them as extras. Compare like with like. Our team also offers commissioning, FAT and SAT support if you need independent help at this stage.
Red flag: “Australian support” turns out to mean an overseas team in a different time zone.
Single vs Double Deck Tunnel Pasteurisers
A single deck pasteuriser carries packs on one conveyor level. A double deck pasteuriser stacks two conveyor levels in one machine, so it can treat more packs on a similar floor area. Neither is better in every case.
| Factor | Single deck | Double deck |
|---|---|---|
| Floor space | Larger footprint for the same capacity | More output per square metre |
| Ceiling height | Easier to fit | Needs more vertical clearance |
| Maintenance | Simpler access | Upper level needs platforms and safe work at height |
| Integration | Simpler conveyor routing | More complex transfers |
| Best fit | Where floor space isn’t tight | Where floor space is limited and output is high |
When weighing single vs double deck pasteurizer options, ask each supplier to show both layouts on your actual floor plan.
What to Put in Your RFQ
A tunnel pasteuriser supplier can only quote accurately if you give them accurate inputs. Send this information with your RFQ (request for quote). You will get quotes that are far easier to compare.
| Topic | Provide |
|---|---|
| Product | Product type, alcohol level, carbonation, target shelf life |
| Pack | Container type, sizes, number of formats |
| Process | Product temperature at infeed, validated PU target (if known) |
| Output | Normal speed, peak speed, current filler speed |
| Growth | Output target for the next three to five years |
| Site | Power, steam, water and cooling available |
| Layout | Floor space, ceiling height, existing conveyors |
| Controls | Automation needs, data and QA record needs |
What Evidence Should a Supplier Provide?
This guide is built on one idea: don’t rely on supplier claims; ask for evidence. Ask every tunnel pasteuriser supplier for the same documents, so you can judge them fairly.
| Evidence | What it proves |
|---|---|
| Reference sites | The design runs on similar products and packs |
| Energy and water data | Running costs at your line speed |
| Thermal and PU test data | The process hits the target every time |
| Sample process records | What your QA team will actually receive |
| FAT (factory acceptance test) records | The machine works before it ships |
| SAT (site acceptance test) records | The machine works on your site, in your line |
| GA drawings and specifications | Size, clearances, utility points and what’s included |
| Maintenance schedules | Labour and downtime to plan for |
| Spare-parts lists and lead times | Which parts wear and where they are stocked |
| Warranty terms and SLA | What is covered and how fast help arrives |
Supplier Red Flags
Watch for these warning signs when you compare quotes:
- Capacity is quoted without naming the pack size.
- Energy use is called “highly efficient” with no kWh data.
- No reference site runs a similar product.
- PU performance is discussed without real process data.
- Installation and utility work are not in the quote.
- Spare-parts lead times are vague.
- “Australian support” actually means an overseas team.
One red flag doesn’t rule a supplier out. But it is a reason to ask harder questions before you sign.
New vs Refurbished Tunnel Pasteurisers
A refurbished tunnel pasteuriser can cost less up front, which can suit a growing producer. Before you buy, check its age and history, the state of its controls (and whether parts are still made), pumps, spray system, heat exchangers, conveyors, manuals, safety systems and remaining service life.
A well-kept refurbished machine can be a smart choice. A cheap one with old controls and no manuals can become costly fast. Judge it on cost and risk over the next few years, not just today’s price. See our page on refurbished process equipment for more.
Tunnel Pasteuriser TCO
Total cost of ownership (TCO) is everything a tunnel pasteuriser will cost you over its working life, not just the quote price.
TCO = purchase + installation + commissioning + energy and water + maintenance + spare parts + downtime + future upgrades
Here is how to lay out a five-year comparison. Fill in the figures from each supplier’s quote and data. The values below are placeholders, not real prices.
| Cost item | Supplier A | Supplier B |
|---|---|---|
| Purchase price | $[A] | $[B] |
| Installation and commissioning | $[A] | $[B] |
| Energy and water (per year × 5) | $[A] | $[B] |
| Maintenance (per year × 5) | $[A] | $[B] |
| Spare parts (per year × 5) | $[A] | $[B] |
| Expected downtime (hours × your cost per hour) | $[A] | $[B] |
| 5-year TCO | $[total] | $[total] |
How to calculate it: take annual energy and water use at your real line speed and multiply by your local tariffs. Add the supplier’s maintenance schedule costed at your labour rate. Then price downtime using your own lost-production cost per hour. A machine with a higher purchase price can still win if it uses less energy and water and stops less often.
Buying a Tunnel Pasteuriser in Australia
Buying a tunnel pasteuriser in Australia adds some extra checks. Long distances mean drinks often travel interstate or to regional areas in warm weather, so stable shelf life matters. Energy and water costs also deserve a central place in your decision.
Australian buyer checklist:
- Service team based in Australia
- Local spare-parts stock
- Electrical requirements to Australian supply
- Site commissioning by local engineers
- Water availability on site
- Wastewater limits and drainage
- Response times for regional sites
- Documentation and manuals
- Applicable food safety requirements
- Operator training
Legal requirements vs good practice
It helps to separate what the law requires from what is simply good buying practice.
| Type | What it covers |
|---|---|
| Regulatory requirements | The Australia New Zealand Food Standards Code sets food safety standards. They include Standard 3.2.2 (food safety practices) and Standard 3.2.3 (food premises and equipment). Standard 3.2.2A applies to certain food service and retail businesses. Which standards apply depends on your business and products. |
| Good engineering and buying practice | Hygienic design to guidance such as EHEDG, HACCP-based food safety plans in line with the Codex General Principles of Food Hygiene (CXC 1-1969), validated PU targets, and FAT/SAT testing. These are strongly recommended, but are not always legal requirements. |
This guide is not legal advice. Confirm which requirements apply to your product with your food safety or regulatory adviser.
Common Buying Mistakes
- Choosing on purchase price alone.
- Sizing for average output instead of peak output.
- Forgetting that cans, glass and PET behave differently under heat.
- Measuring the tunnel but not the space around it.
- Assuming every quote includes the same parts.
- Not checking local service and spare-parts stock.
Tunnel Pasteuriser Buyer Scorecard
Score each supplier from 1 (poor) to 5 (excellent) on each line. Only give a high score when they back it with the evidence listed.
| Criterion | What to compare | Evidence to request | Supplier A | Supplier B | Supplier C |
|---|---|---|---|---|---|
| Throughput | CPM at your largest pack | Performance test | |||
| Thermal control | PU consistency | Heat and PU data | |||
| Water | Litres per hour at operating speed | Supplier data | |||
| Energy | kWh per hour, or equivalent | Measured data | |||
| Maintenance | Access and service time | Maintenance procedure | |||
| Integration | Conveyor and interface needs | GA drawing | |||
| Support | Response time | SLA | |||
| TCO | 5 to 10 year cost | TCO calculation |
How to Shortlist Three Tunnel Pasteurisers
- Define your product and pack.
- Define normal and peak throughput.
- Define your thermal and PU target.
- Document your available utilities.
- Get comparable quotes from three suppliers using the RFQ table above.
- Request the same evidence from each.
- Score each machine against the nine criteria.
- Calculate a five-year TCO.
- Inspect a reference installation.
- Confirm commissioning, training, warranty and spare parts in writing.
Frequently Asked Questions
Who makes the most reliable tunnel pasteurisers?
There is no universally most reliable tunnel pasteuriser manufacturer. Reliability depends on your line. Judge it on throughput, thermal control, product compatibility, utilities, maintainability, integration and support. So don’t ask “Which manufacturer is best?” Ask “Which manufacturer can prove its machine meets our process requirements?”
What capacity tunnel pasteuriser do I need?
Base it on your peak speed, largest pack, shift pattern and growth plans. For example, if your filler runs faster in summer and you plan to add a larger can, the machine must handle that peak with that can. See criterion 1, Throughput.
What is the difference between a single deck and double deck tunnel pasteuriser?
A single deck machine has one conveyor level. A double deck machine stacks two, giving more output on a similar floor area but needing more height and access planning. See the deck comparison above.
How much water does a tunnel pasteuriser use?
It depends on the design, pack, line speed and how much water is reused between zones. Ask each supplier for litres per hour at your actual operating speed, not a general claim.
How much electricity does a tunnel pasteuriser use?
This also depends on design, speed and the heating method. Ask for kWh per hour, or the steam equivalent, at your real line speed. Then add it to your TCO comparison.
Can one tunnel pasteuriser handle multiple pack sizes?
Often, yes. Many tunnel pasteurisers store recipes for different products and packs. Check how the supplier handles changeovers, and ask for a reference site running a similar mix.
What should be included in a tunnel pasteuriser quote?
The machine, controls, heat exchangers, pumps, conveyors, installation, commissioning, training, documentation, warranty and spare parts. Ask each supplier to list what is excluded.
What information does a supplier need to size a tunnel pasteuriser?
Your product, pack types and sizes, normal and peak speed, PU target, utilities and floor space. Use the RFQ table above.
Is a refurbished tunnel pasteuriser worth buying?
It can be, if the controls are supported, the documents exist and the key parts are in good shape. Judge it on five-year cost and risk, not price alone.
How long does a tunnel pasteuriser last?
There is no fixed lifespan. It depends on build quality, running hours, maintenance, water quality, cleaning and whether parts and control support stay available.
What utilities does a tunnel pasteuriser need?
Most need three-phase power, a heat source (steam or hot water), cooling water and a water supply for the sprays. Some also need chilled water and compressed air.
Final Buying Checklist
Before you sign the purchase order, confirm:
- Throughput validated at your largest pack
- Thermal process and PU target validated
- Utilities confirmed
- Layout and maintenance access approved
- Energy and water figures received
- Spare parts and lead times confirmed
- Warranty and SLA confirmed
- Commissioning and training confirmed
- Five-year TCO compared