What Are High-Velocity Hot Air Sterilizers?
Steam sterilization is traditionally the go-to method for most medical and dental applications. It is well known, widely innovated, and highly versatile. However, its dominance often raises a question: why use other sterilizers if steam is so effective? In the past, the choice was purely about basic efficacy. Today, thanks to modern engineering, selecting a sterilization method depends on the specific operational needs of your practice. In this article, we explore a powerful alternative to steam: High-Velocity Hot Air (HVHA).
We’ll break down what HVHA is, explain how it works, and showcase two cutting-edge autoclaves that utilize this technology to streamline daily operations.
What Are HVHA Sterilizers?
HVHA is a specialized type of dry heat sterilization that is transforming how dental and medical offices handle instrument turnover. Traditional dry heat sterilization was notoriously slow. While older machines worked well enough for basic tasks, they required prolonged cycle times to achieve microbial inactivation. Additionally, older medical and dental instruments often suffered from temperature compatibility issues. Fortunately, technology has evolved.
Thanks to breakthroughs in dry heat engineering and the development of highly durable instrument materials, HVHA sterilization is making a massive comeback. At its simplest, HVHA uses rapidly moving air as a fluid medium to transfer heat evenly from the chamber directly to your instruments. Instead of relying on harsh chemicals or moisture, the intense, moving heat targets microorganisms directly, damaging their DNA and enzymes to halt reproduction.
Just like steam autoclaves, HVHA units feature precise cycle times designed specifically for wrapped and unwrapped loads. Every cycle is intelligently divided into the active sterilization time and the initial processing time required for the chamber to hit the exact temperature needed for complete spore destruction. By combining this rapid dry heat science with reliable replacement parts and routine maintenance, modern practices can enjoy fast, waterless, and chemical-free instrument turnaround every single day.
How Does CPAC Utilize HVHA Sterilization?
CPAC defines its RapidHeat HVHA system as follows:
“HVHA dry heat sterilization employs uniform, high-velocity hot air (375°F) within the sterilization chamber that allows rapid heat transfer for maximizing microbial kill. Unlike static dry heat sterilizers, which rely on gravity or low-velocity fans to distribute heated air, RapidHeat sterilizers employ HVHA that can sterilize instruments in minutes rather than the hours required for static dry heat sterilization.”
Simply put, the RapidHeat process circulates high-velocity hot air through a sealed chamber at 200 to 300 air exchanges per minute. This intense output enables start-to-finish sterilization cycles in as little as 12 minutes. Additionally, CPAC units feature a low-temperature cycle format to protect delicate instruments that are prone to thermal degradation.
What Kind of HVHA Sterilizers Do We Offer?
If you are looking for a modern system that utilizes High-Velocity Hot Air technology, we have exactly what you need. CPAC’s RH-Pro line—consisting of the RH-Pro9 and the RH-Pro11—offers the perfect HVHA autoclave solutions for your practice.
What is the CPAC RH-Pro9?
The CPAC RH-Pro9 is a unique addition to any practice, offering a compact footprint and rapid processing speeds. Because it relies entirely on the rapid circulation of hot air, it completely eliminates the need for water or steam. This waterless process drastically shortens the drying cycle, which helps prolong the lifespan and structural integrity of your tools.
The RH-Pro9 also features a specialized cycle to safely sterilize N95 masks for reuse during supply shortages. It includes pre-programmed settings to accommodate both high-heat instruments and more delicate, low-heat tools.
Here are some of the additional benefits of the RH-Pro9:
- FDA-Cleared 6 Minute Cycles (Unwrapped)
- FDA-Cleared 12 Minute Cycles (Wrapped)
- Smaller Cabinet-Ready Size (1163 Cubic Inches)
- Uses 85% Less Energy Than Steam
- Non-Corrosive Sterilizer Environment
- Waterless Sterilization with No Chemicals
- Convenient Smaller Size — Three Instrument Trays
Low Temperature Cycles
- Allows user to validate and verify 12-log kill sterilization
- Choice of three low-temperature cycles
- Eliminates heat-sensitive device concerns
- Time/temperature profiles equivalent to steam
- Three temperature cycles: 320°F (160°C), 300°F (149°C), 280°F (138°C)
RapidHeat Cycles
- Cycle 1 – 6 minutes for unwrapped instruments
- Cycle 2 – 8 minutes for hand pieces and medical drills
- Cycle 3 – 12 minutes for wrapped instruments
N95 Mask Cycle
- 34-minute cycle @ 175°F
- Assures mask returns to original user
- Maintains mask performance/function over multiple cycles
- No drying or aeration required
As we mentioned before though, the RH-Pro9 isn’t the only HVHA sterilizer we’ve got….
What is the CPAC RH-Pro11?
The RH-Pro11 is CPAC’s larger-capacity HVHA sterilizer. Utilizing the same cutting-edge RapidHeat technology, it delivers the fastest instrument turnaround of any FDA-cleared sterilization method on the market. Just like the RH-Pro9, its waterless operation eliminates lengthy drying cycles and prevents instrument corrosion. It also shares the same versatile high-heat, low-heat, and N95 mask-sterilization programming.
Here are some of the additional benefits of the RH-Pro11:
- FDA-Cleared 6 Minute Cycles (Unwrapped)
- FDA-Cleared 12 Minute Cycles (Wrapped)
- Larger Tabletop Capacity (2295 Cubic Inches)
- Uses 85% Less Energy Than Steam
- Non-Corrosive Sterilizer Environment
- Waterless Sterilization with No Chemicals
- Greater Capacity — Four Large Trays
Low Temperature Cycles
- Allows user to validate and verify 12-log kill sterilization
- Choice of three low-temperature cycles
- Eliminates heat-sensitive device concerns
- Time/temperature profiles equivalent to steam
- Three temperature cycles: 320°F (160°C), 300°F (149°C), 280°F (138°C)
RapidHeat Cycles
- Cycle 1 – 6 minutes for unwrapped instruments
- Cycle 2 – 8 minutes for hand pieces and medical drills
- Cycle 3 – 12 minutes for wrapped instruments
N95 Mask Cycle
- 34-minute cycle @ 175°F
- Assures mask returns to original user
- Maintains mask performance/function over multiple cycles
- No drying or aeration required
Looking for Replacement Parts and Maintenance Support?
To get the most out of advanced sterilizers like the RH-Pro9 and RH-Pro11, routine and timely maintenance is critical. Regular servicing doesn’t just extend the lifespan of your autoclave—it ensures the unit performs flawlessly during daily medical operations.
To help you stay ahead of your maintenance schedule, we are excited to introduce our new dedicated parts page for CPAC RH-Pro9 and RH-Pro11 sterilizers! Instead of waiting for a critical door seal to fail or internal components to wear down, you can proactively browse our wide selection of original equipment manufacturer (OEM) parts.
- Door Seal Gaskets
- LCD Module PCBs
- Blower Motor Assemblies
- CIR Thermal Sensors with Thermocouple
- Fan Guard PCBs
- Door Lock PCBs
- …and more!
Don’t sit around waiting for that seal to fail, or those internals to wear down. We’ve got parts pages for both the RH-Pro9 which you can find here. As well as a separate page dedicated to the RH-Pro11 which you can find here.
Final Thoughts
At the end of the day, upgrading how your facility approaches infection control is about building a faster, more reliable foundation for your entire clinical workflow. Moving away from the traditional headaches of moisture, long drying phases, and high energy use allows your team to focus less on equipment turnaround and more on what matters most: patient care. Whether you are ready to completely rethink your instrument processing with High-Velocity Hot Air or simply looking to keep your current equipment operating at peak performance with routine maintenance, investing in smarter sterilization technology is a vital step toward a more efficient, future-ready practice.
If you have any questions about HVHA sterilizers like the CPAC RH-Pro9 and RH-Pro11, sterilization in general, or anything else, give us a call at 704-966-1650 Option 3 for our Free Tech Support Line.
As always if you have any questions about this process or anything else please feel free to contact us and take advantage of our “FREE TECH SUPPORT.”
We also offer FREE VIRTUAL TECH SUPPORT to “See and Talk” with a “Real Time Live Technician” for any problems you may be in need of help with.
You can also use our “FREE MAINTENANCE PROGRAM”. Take the guesswork and worrying about what unit is due for maintenance and which maintenance cycle it is time for. We will keep track of all your autoclaves and let you know when it’s time for anything.
The CPAC RH-Pro9 Dry Heat Sterilizer is available on our website here
The CPAC RH-Pro11 Dry Heat Sterilizer is available on our website here
You can find parts for the CPAC RH-Pro9 Dry Heat Sterilizer on our site here.
We also have parts for the CPAC RH-Pro11 Dry Heat Sterilizer on our site here.