Proper care and charging of your RH Shield device ensures maximum lifespan, stable humidity performance, and the full rated coverage for your storage container. RH Shield beads are preconditioned to maintain a specific humidity level and use true 2‑way moisture regulation to keep your environment stable. This guide explains how to charge your device correctly, how to avoid premature bead failure, and how to achieve both minimum and maximum rated humidification levels.
For additional details about bead behavior and device ratings, we also recommend reviewing our FAQ page.
1. Charging Your RH Shield Device
Use Only Distilled Water
Always charge RH Shield devices and loose beads with distilled water. Tap water and mineral-rich water can shorten bead life and reduce performance.
Do NOT Use Propylene Glycol (PG)
PG-based solutions reduce the effectiveness of preconditioned silica beads and should never be used with RH Shield devices.
Avoid Submerging the Device
While submerging can rapidly charge beads, we strongly advise against it. Submersion causes beads to absorb water too quickly, swell, and crack—significantly shortening their lifespan.
Recommended Charging Method: Fine Mist Sprayer
For best results:
- Fill a fine mist spray bottle with distilled water.
- Hold the device over a sink or catch pan.
- Spray lightly through the perforations while rotating the device.
- Continue misting until 50–70% of the beads turn from opaque white to clear.
- Wait a few minutes to allow absorption.
- Mist again until most beads have turned clear, indicating a full charge.
Drain Excess Water
After charging:
- Lay the device horizontally in a sink or tray for 10 minutes to allow excess water to drain.
- For tube-style devices, tilt the tube so each end cap faces downward to release trapped water.
- Give the device a few light shakes over the sink to remove any remaining unabsorbed water.
Removing excess water prevents leakage inside your storage container and ensures stable humidity performance.
2. Achieving Rated Coverage (Minimum vs. Maximum)
Minimum Rated Coverage
A fully charged RH Shield device will quickly support the minimum rated weight of material and minimum rated cubic foot volume listed for that device—assuming:
- Your container is non‑porous
- The seal is appropriate
- The container is not opened frequently
Under these conditions, the device will maintain the RH% level of the beads installed.
Maximum Rated Coverage
You can reach the maximum rated weight and volume for any device, but doing so requires more attention during the first few weeks.
To achieve maximum coverage:
- Check bead color weekly.
- Recharge as needed until all material reaches full humidity stasis.
- Expect several weeks (or months for compressed materials) before the core is fully humidified.
- Use an RH meter to monitor progress—highly recommended.
Note: New wooden or porous containers may take longer to reach equilibrium, especially if they are not fully seasoned.
3. Environmental Factors That Affect Performance
Your device will maintain stable humidity as long as:
- The container does not exceed the maximum rated weight or volume
- The container has a proper seal
- The container is not porous
- The container is not left open for extended periods
- Ambient room temperature remains stable
Under ideal conditions, a fully charged device can last from one month to several months before needing a recharge.
4. Regenerating RH Shield Beads
If all beads turn fully clear, they have absorbed their maximum moisture and must be regenerated to restore absorption capacity.
Oven Method
- Place beads in a dish (not in their container).
- Put in an oven set to 240°F (do not preheat).
- Heat for approximately 2 hours or until beads return to a white color.
Hair Dryer Method
- Use medium heat for approximately 15 minutes.
- Keep beads in their container to prevent blowing around.
- Shake or mix to ensure even drying.
5. When to Add Additional Devices
If you exceed the recommended maximum weight or volume—or if environmental humidity does not stabilize—you may need to add additional RH Shield devices.
You can safely use multiple devices in the same container, but they should all contain beads of the same RH% rating to avoid competing moisture levels.
6. Why RH Shield Performs Better Than Competitors
Most competing humidification products use “jelly” beads that only push humidity, often oversaturating material.
RH Shield devices use specialized hard silica beads that:
- Push humidity when needed
- Pull excess humidity when needed
- Maintain a stable RH stasis at the bead’s rated percentage
This dual‑action humidity control is what makes RH Shield the most stable, reliable, and long‑lasting solution available at its size and price point.
7. Summary: Best Practices
- Use distilled water only
- Do NOT use PG
- Mist—don’t submerge
- Charge until beads turn clear
- Drain excess water thoroughly
- Monitor bead color weekly when humidifying maximum loads
- Add additional devices if exceeding rated limits
- Keep containers sealed and non‑porous
- Maintain stable room temperature
- Regenerate beads when fully clear