FD Heat Pump Dehydrators

FD-Series Heat Pump Dehydrators

Nyle heat pump dehydration systems precisely control temperature, humidity, and dwell time to reduce product moisture content while maintaining quality characteristics such as color, texture, nutrients, and essential ingredients. Heat pumps are the perfect drying technology for applications including healthy snack foods, meats, seafood, and pet treats where low temperatures and humidity control are critical.

Each system includes a heat pump unit, an insulated drying chamber, air handling components, and PLC-based electrical controls with an operator screen. Heat pumps are very efficient and only need electric power to operate, eliminating the need for fossil fuels and associated airborne emissions.

Product Documents

How Our FD-Series Heat Pump Dehydrators Work

Dehumidification dehydrators work differently than conventional dryers. For both systems, the air is heated to the desired drying temperature and then circulated over the product to absorb moisture.

However, instead of exhausting this hot, moist air as a conventional dryer would, a dehumidification dehydrator draws the air over the cold coil of a refrigeration system.

Moisture is condensed from the air and drained away. Air is drawn over the hot coil of the system to reheat. It is then sent back over the wet product.

This cycle repeats until the product has reached the desired moisture content. The energy used is only what is necessary to operate the refrigeration compressor, blower, and circulating fans. It uses up to 60% less energy than conventional dryers.

What Capacity Do You Need?

Which water removal rate best fits your process? Ideal rates are highly product-dependent. However, it can be calculated with three measurements of your existing process: product wet weight, product dry weight, and time from wet to dry.

By finding the product weight change (wet weight minus dry weight) and dividing this by the time measurement (in hours), you can find the average water removal rate (in pounds per hour) occurring in your current process. Next, you can scale this number based on the amount of wet product you wish to start with or the amount of dry product you want to end with. Now, you need to decide how much drying area you need.


Nyle Systems FD heat pump dehydrators’ controllers are the best in the industry. Each unit comes with an intuitive touch screen controller programmed with flexible drying scheduling software. Drying schedules can be saved and modified as necessary and remote access is available as long as there is an internet access point.

Product Comparison


Water Removal Rate

Number of Racks*

Total Drying Space**

Maximum Chamber Temperature***

Loading Space 
(L x W x H)

Total Footprint 
(L x W x H)

24 lbs/hr
8 Racks
520 Sq Ft

180º F

8’ 2” x 5’ 2” x 6’ 0”

15’ 6” x 5’ 10” x 9’ 5”

60 lbs/hr
18 Racks
1,170 Sq Ft

180º F

13’ 0” x 7’ 7” x 6’ 0”

22’ 4” x 8’ 4” x 10’ 8”

145 lbs/hr
36 Racks
2,340 Sq Ft

180º F

20’ 3” x 7’ 3” x 6’ 0”

21’ 0” x 19’ 8” x 11’ 3”

225 lbs/hr
52 Racks
3,380 Sq Ft

180º F

29’ 1” x 7’ 4” x 6’ 0”

29’ 9” x 19’ 8” x 11’ 6”

675 lbs/hr
138 Racks
8,970 Sq Ft

180º F

52’ 4” x 11’ 0” x 6’ 0”

53’ 1” x 23’ 4” x 11’ 6”

* Based on standard rack dimensions of 26" D x 20 3/8" W x 69 1/2" H.
** Based on 20 layers per rack with a capacity of 3.25 Sq Ft per layer.
*** The maximum chamber temperature specified is primarily intended for the bacteria-kill step. It is essential to note that the heat pump system will cease the drying process at a temperature of 160°F.

High Quality 
& Efficient Dehydrators 

High Quality & Efficient Dehydrators 

12 Stevens Rd,
Brewer ME, 04412
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