A Good Dehydrator on the Cheap

How I Built a DIY Food Dehydrator for Under $20 (and It Works Better Than My Old One)

A month ago, my trusty HarvestRite food dehydrator, which I purchased years back at Cabela’s, suddenly malfunctioned, puffing out smoke and emitting strange sounds. Upon inspection, I discovered that not only was the heating element completely fried, but the fan had also given up the ghost.

Given my personal commitment to clean food—something I explored in Escape Preservatives: Recover from Psychic Numbing with Off Grid Food—this situation just wasn’t tenable.

While I considered sourcing replacement parts to salvage it, the thought of upgrading to a larger model had already been on my mind. As I began to explore my options online, I was shocked to discover that many dehydrators were priced in the hundreds, with some even exceeding the $1,000 threshold.

I couldn’t help but wonder, “It’s just a box with a fan and a heater—why is it priced like a small refrigerator?” The experience led me to explore alternative drying methods, prompting me to think outside the box and seek an innovative DIY solution focused on enhanced airflow.

Research (and a few cigars)…

So I entertained the idea of sun-drying—something I’d totally do if it was summertime. But it’s winter, so sun-drying was off the table. I also tested the oven-drying method, but with a minimum temp of 170°F—even with the door cracked full open—my strawberries came out as charred little nuggets.

That’s when it hit me: the real magic of food dehydration isn’t necessarily the heat. It’s air movement. Convection. As long as the air is moving and warm enough, moisture gets pulled from the food. So I got to thinking—what if I just made something simple, based on airflow?

A thank you to Earth Exploration for an idea on how to do this that fit my thought and supplies perfectly!! Earth Exploration YouTube Channel

Off to the garage…

Off to the garage I went. I had some scrap 2x4s, and I picked up a roll of aluminum screening at the hardware store for about $15. I had an old box fan sitting around unused. That was really all I needed. I built a series of wooden frames, stapled the screening to the bottoms to create mesh trays, added legs, and placed the fan on top. Boom—homemade dehydrator.

The First Test

First test: sliced strawberries and tomatoes. Some went on parchment paper, some directly on the racks. I flipped on the fan. The tomatoes were fully dried in a day. The strawberries took about three days, but they came out perfect—sweet, chewy, and just right.

Success?

All in, I spent about $20, $40 if you buy a fan. It holds about three times as much as my old dehydrator, and it cost maybe a sixth of the price. Honestly? It works better. Simpler, more capacity, and no plastic trays to crack or warp.

If you’re looking for a homemade food dehydrator option, especially one that’s budget-friendly and effective, this setup might be worth trying. I’m already thinking of a few upgrades:

Adding air filters on top of the fan so I can run it outdoors without inviting bugs.

Positioning a small space heater to blow warm air near the intake for faster drying.

If you’ve made your own or have ideas for tweaks, I’d love to hear about them. Sharing builds and learning from each other is half the fun in DIY!