Frequently Asked Questions

Energy efficient – savings of $10,000 – $20,000 per year in energy costs
Low running costs – about half of standard hot air dryers or freeze dryers
No electric elements or naked flames (safety)
A sealed chamber means there are no odours vented out, and no contaminated air pulled in
Rexmoi® dehydrators can be opened at any time during the process to check the product.

Why the energy savings happen:

1. Closed-loop system: The heat pump recycles heat from the exhaust air rather than venting it.

2. Latent heat recovery: When moisture condenses out of the air, the latent heat is recovered and reused.

3. Efficient heating: The refrigerant cycle can deliver multiple units of heat for each unit of electricity.

Internet search using ChatGPT or other AI apps, which provide unbiased information, to better understand the substantial benefits of Heat Transfer coils, (also called Run-Around Coils) and Heat Pump technology for food drying.

We offer a product testing unit for hire at $600 per day at our premises in Tauranga NZ. There is also expert assistance available at $130 per hour, this will likely shorten the trial and error process considerably, saving you a lot of time and money. Or you can hire a dryer at your site for $5000 per month.

Removing moisture from products
Controlling moisture in products
Low temperature cooking
As a Chiller (and can automatically chill products at the end of the drying cycle)

Units are available for hiring from $65 per day
Delivery arranged to your premises (fees apply), simply plug the dryer in and use it from the day it arrives

Single phase or three phase power – depending on the unit
Prefer inside or under cover, but can operate outside

By loading your product on to the trays or bins and loading these into the trolleys. The trolleys are then rolled up a low ramp (or lifted by an electric loader) into the dryer. This is a one-person task.

View the specifications on the specific dryer model page you would like to rent. Dryers can be loaded and moved into position with a forklift.

🔄 Heat Pump Drying vs ❄️ Freeze Drying: Which is Better?

When choosing the right drying technology, it’s important to balance speed, energy use, product quality, and cost. Here’s a clear comparison of heat pump closed-loop air drying and freeze drying:

🕒 Drying Time

• Heat Pump Drying: 4–20 hours

• Freeze Drying: 20–48+ hours
  ✅ Heat pump drying is significantly faster.

⚡ Energy Efficiency

• Heat Pump Drying: Low energy use (heat is recovered and reused)

• Freeze Drying: Very high energy consumption (vacuum and refrigeration systems)
  ✅ Heat pump drying is much more energy efficient.

🌿 Product Quality

• Heat Pump Drying: Good shape, color, and nutrient retention

• Freeze Drying: Excellent shape, color, and nutrient preservation
  🔄 Freeze drying has the edge for sensitive products, but expensive.

💰 Cost & Complexity

• Heat Pump Drying: Lower capital cost, simple operation, easy maintenance

• Freeze Drying: High upfront cost, complex vacuum systems, larger footprint
  ✅ Heat pump systems are more cost-effective and easier to run.