Class B vs Class S Autoclaves: What’s the Difference (and Why It Matters for Aussie Clinics)?

Still unsure if you really need a Class B?

A lot of small clinics in Australia ask this, especially when they see the price jump between a Class S and a Class B autoclave.

The short answer?
If you’re sterilising wrapped instruments or hollow items (like handpieces), Class B is the only compliant choice.

Let’s break it down so you know exactly what you're paying for, and why it matters.

What Is a Class B Autoclave?

A Class B autoclave:

• Uses a pre-vacuum phase to remove all air
• Allows full steam penetration into hollow, wrapped, or porous items
• Is mandatory for Australian dental clinics that reprocess critical or semi-critical instruments

They're based on European standard EN13060 — meaning they meet international benchmarks for medical-grade sterilisation.

Class B = the gold standard for sterilising any item that goes in a patient's mouth.

What Is a Class S Autoclave?

Class S units are simplified sterilizers. They:

• Don’t perform a full vacuum cycle
• Are suitable only for solid, unwrapped instruments
• Might not sterilise internal surfaces of handpieces or cannulated tools

That makes them common in:

• Tattoo studios
• Nail salons
• Some medical applications where hollow tools aren’t used

But for dental? They're usually non-compliant unless your tools are strictly unwrapped and solid.

Which One Do You Need for a Dental Clinic?

 

If you're in Australia and working in dentistry — it's simple:

Class B is required for any dental practice sterilising handpieces, mirrors, scalers, or anything that’s:

• Wrapped
• Reusable
• Goes in the patient’s mouth

That includes most clinics, mobile dental setups, and orthodontic offices.

Is a Class B Worth the Extra Money?

Yes, not just for compliance, but peace of mind.

It also means:

• Fewer sterilisation failures
• Better infection control
• Easier audits from your infection control inspector

It’s not an upsell — it’s your license.

Best Class B Models for Australian Clinics

Here are some top-rated models we recommend for value, performance, and easy servicing:

• Melag Vacuklav 23B+ – German-made, premium vacuum system
• Runyes Feng 23L Class B – Reliable, mid-tier, great value
• W&H Lina Class B – Compact and quiet with strong warranty
• Euronda E9 Med – User-friendly interface, excellent drying cycle

Need help comparing specs or getting a quote?