DehumidifiersFind out which brand of dehumidifier is made with growers in mind. © Copyright, Eljay, 2017

Rising Damp? The Quest for Reliable, Electricity-Saving, Locally Made Marijuana Grow Room Dehumidifiers

Humidity is a crucial factor in how well your indoor marijuana plants grow. Your grow room has to have precise control of the amount of moisture in the air so that you manage vapor pressure deficit, or VPD, and relative humidity.

Too much humidity and/or the wrong VPD can create plant stress, or encourage an epidemic of gray mold (botrytis), powdery mildew, or pests like thrips and spider mites — which is why you need to invest in a dehumidifier.

A dehumidifier isn’t an air conditioner or air purifier. Its sole purpose is to remove moisture from the air so humidity levels go down.

But mainstream dehumidifiers used by most growers are energy hogs, and have had serious safety problems.

For example, I remember when a dehumidifier caught fire when I was running a basement grow op.

Fortunately, my grow-room monitoring system notified me, and the dehumidifiers were in a remote section of the basement surrounded by concrete. I avoided catastrophe, but all growers know that grow room fires can lead to not only big busts, but big losses.

The mainstream dehumidifier brands you find at stores like Home Depot and Lowe’s have all been reported to have serious defects. Millions of units from well-known brands have been subject to manufacturer recalls from the US Consumer Product Safety Commission, beginning in 2002 and as recently as 2016. These include such big names as Danby, DeLonghi, Honeywell, Kenmore, Keystone, Perfect Home, Professional Series, Frigidaire, GE, Danby, ComfortAire, Sunbeam and Sylvania.

According to a report last year from ABC News, hundreds of fires and several million dollars in property damage resulted from dehumidifier fires and electrical faults from those brands.

So Which Brand Offers The Perfect Grow Room Dehumidifier?

We could think of no better source for answers about grow room dehumidifiers than Eljay, global cultivation manager for hydroponics nutrients company Advanced Nutrients, and the maker of the How To Hydro video series you see on this website. Eljay has run megawatt, commercial-sized legal grow ops as well as at-home cannabis gardens. And he’s used most dehumidifier brands.

He told us that while he hasn’t personally experienced dehumidifier fires, some of his associates have.

And fires aren’t the only thing that makes most mainstream dehumidifier brands unacceptable for grow rooms, Eljay informs us.

“I’ve had dehumidifier drain hose connector threads strip out after only a few uses, or the auto shutoff didn’t work, so water was an inch deep on the floor, and that’s an electrocution risk. Or the wheels are cheap so you can’t roll the unit around and have to carry it. All kinds of defects that create big inconveniences and safety problems.”

Eljay lists the following common deficiencies with regular dehumidifier brands that marijuana growers are reported to have experienced:

  • Poor drainage via leaky hose attachments.
  • Poor logistics for on-board bucket storage of water.
  • Unreliable shut-off that allows bucket storage overflow.
  • Inferior hardware, casing, materials.
  • Unreliable controls for setting and maintaining target humidity.
  • The system is just too damn noisy.
  • Generates too much heat.
  • Doesn’t remove enough pints of water daily from the air.
  • Inefficient compressors and other components, creating excess electricity usage.
  • Inaccurate, misleading specs that exaggerate the unit’s water-removing capacity.
  • Weak warranties and inept or nonexistent warranty service.
  • Frequent breakdowns.
  • Risk of unit catching fire or causing electrical shorts.

The Quest Begins And Ends At Quest Dehumidifiers

Eljay was glad when he started hearing from other commercial marijuana growers about Quest, a US brand that was manufacturing rock-solid, high-efficiency dehumidifiers designed for indoor grow ops.

“To my knowledge, there are only two companies making dehumidifiers for grow rooms. One of them focuses mostly on air conditioning, though. Growers I respect were telling me, ‘Go with Quest. They specialize in dehumidifiers,’” Eljay says.

“I looked at prices for Quest units. They were higher than Home Depot dehumidifiers and at first that discouraged me. I looked at the actual specs and talked to the Quest people. I saw that the electricity money I save using Quest will more than pay for the cost of the units. Now Quest is the only dehumidifier I’d ever use or recommend for a grow room.”

Eljay explains that a Quest dehumidifier removes double, even triple the pints of water per day from grow-room air, compared to a regular dehumidifier.

“One Quest rated at 787 watts and 7.1 amps does the same amount of work you’d need three or four regular dehumidifiers for, each of which are drawing 750 watts each,” he reveals. “The Quest efficiency and performance are off the charts compared to regular brands. They can handle any temperature and any relative humidity you’ve got in your grow room.”

Check out the below video featuring a Quest representative talking dehumidification.

Saving Money, Saving Jobs

Eljay says that by running Quest dehumidifiers, especially the dual overhead units, he’s saving hundreds of dollars per year per unit in electricity costs.

Another thing Eljay appreciates is that Quest makes dehumidifiers for all cannabis grow-room sizes.

“You go to a licensed, legal grow op running 20,000 watts or more of grow lights, and you see industrial Quest models more than you see any other brand,” he says. “In smaller grow rooms, when the grower has the best information about dehumidifiers, you see portable Quest models. What’s really impressive is everybody I’ve talked to who has Quest raves about them.”

Eljay notes that for years he’s run both new and refurbished Quest units that have performed equally well, with zero problems .

“All indoor marijuana growers know how important it is to have a reliable dehumidifier. Your indoor grow op plants are transpiring many gallons of water every day. If your dehumidifier fails or can’t keep up, your grow-room air becomes soggy, and your plants get hurt.”

Another reason Eljay recommends Quest instead of other dehumidifier brands is that Quest provides accurate, personalized advice on calculating your dehumidifier needs.

“One of the mistakes I made early in my cultivation career was to have too many or not enough dehumidifiers. When I got with Quest, they helped me calculate the right number, type and capacity of dehumidifiers for my garden,” he says.

Fire risk and other defects in mainstream dehumidifiers might be due to the fact those manufacturers outsource their factories to other countries that aren’t subject to the same rigorous standards and testing as here in the US.

“I’m a firm believer in buying American products because the quality is better and it keeps jobs right here in the USA. Quest makes all their gear in Madison, Wisconsin. Their units last forever, they work well all the time, they’re easy to run, they don’t cause fires, they’re more energy efficient — it’s worth the investment,” he says.

We’re glad to see a conscientious company making exceptionally high-quality, safe, energy-saving, effective dehumidifiers for the indoor marijuana growing community. For more information, consult the Quest website here.

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