Dehumidifiers get rid of water but we need water for plants

Its an obvious thought that although plants need to be maintained at the correct air humidity and that the moisture that is removed from the air could be put back into the soil saving water.  However, there are more considerations.

A refrigerant dehumidifier uses electric power.  All dehumidifiers do but there is an efficiency aspect.  That energy increases the temperature in the growing environment.  All the energy used in a refrigerant dehumidifier is returned to the room.  In fact even more heat is returned by sometimes a factor of two and a half times.   This is latent heat and appliance heat is not a contributing factor of increasing temperatures with Ecor Pro desiccant dehumidifiers.  With Ecor Pro desiccant dehumidifiers the heat can be vented to the outside.  No need for a secondary system to cool the growing enviroment.

The water that is collected by a refrigerant dehumidifier is condensation.   It is not the same as rain water which is also a condensate.  Rain water travels through the atmosphere becoming more enriched with nitrogen. Minerals are infused when the rain is filtered through rocks and soil as it lands on earth.   Nitrogen or rather resultant nitrates, are essential for healthy plant growth as well as minerals minerals.  Dehumidifier water has none of these elements.

By virtue of the way it dries, an Ecor Pro desiccant dehumidifier can achieve lower humidity levels than a compressor or refrigerant dehumidifier in usual circumstances.  Lower humidity levels are essential for better crop yield.

To achieve lower growing room humidity you need the dehumidifier to react fast and provide dry air air that will circulate to achieve the level of overall growing room dryness. 

commercial dehumidifiers

With Ecor Pro Desiccant dehumidifiers the right level of humidity can be obtained more easily to achieve the optimum growing conditions

1. Seedling Stage

  • Seedlings and clones like high humidity levels of 65-70%
  • Reason: The root system is not established
  • High humidity levels allow water intake through leaves
  • Temperatures with lights on: 20-25 °C / 68-77°F  (lights off: 5 C° lower) / 61-68°F)

2. Vegetation Period

  • Humidity levels can be lowered by 5% each week (acceptable range: 40-70%)
  • Temperatures can be increased a little bit (no obligation)
  • Reason: Roots absorb more water; evaporation through leaves cools plant(s)
  • Temperatures with lights on: 22-28 C° (lights off: 5 C° lower / 63-73°F )


HUMIDITY & Temperature to grow Legal cannabis 

3. Flowering Period

  • Humidity levels need to be lowered to 40-50% (extremely important)
  • You can get away with 55% (anything over 60% is real bad)
  • It’s best to slightly lower temperatures in flowering
  • Temperatures with lights on: 20-26°C / 68-79°F (avoid high temperatures)

4. Late flowering (1-2 weeks before harvest)

  • The following steps are no necessity, but can improve yield, flavour and appearance
  • Bring down humidity levels as much as you can: 30-40%
  • Lower daytime temperatures, and also increase the temperature difference (day/night)
  • Temperatures with lights on: 18-24 °C (lights off: minus 5-10 C°) Means maximum variation from 46-75°F

With Ecor Pro Desiccant dehumidifiers heat can be removed for from the system so that less expensive cooling systems are needed to achieve the right growing conditions.

When you are growing plants;

Care should be taken.  Using distilled or condensed water to water plants has some downfalls.  It is pure but that does not mean plants are going to thrive. You need to consider a few other factors:

Nutrient Deficiency

If you’re growing hydroponically, you might run into a calcium or magnesium deficiency if you use distilled water. Because the primary culprits of hard water are calcium and magnesium, going with distilled means you remove them completely.


Perfectly distilled water usually ends up with a pH of 7, which is neutral. However, some plants like a lower pH, especially when you consider the concept of nutrient lockout.  Cannabis for instance, needs a ph of between 6 and 6.8 when growing in soil and 5.5 and 6.5 when growing hydroponically. 

Easiest and cheapest water to use for plants is rain water.



What is the water collected from refrigerants

Don’t drink the water either;

  • The water collected from refrigerant dehumidifiers is demineralised water and is surprisingly highly aggressive.
  • Its distribution through pipes and storage tanks is not possible because the aggressive water would leach metals and other materials from the pipes and other plumbing materials so food grade plastics should be used only.
  • Demineralised water has been proven to have adverse health effects for humans so much so that the WHO published in its latest report available (2004), that it has been adequately demonstrated that consuming water of low mineral content has a negative effect on homeostasis mechanisms, compromising the mineral and water metabolism in the body.

The process of collection is condensation which is also in effect distillation


Heat Energy is Vented Away

Desiccant dehumidifiers vent heat away so that less cooling is needed to maintain the correct temperatures in the growing enviroment.

EPD150 extraction curve comparison for dehumidifiers by Ecor Pro

Click Image to Enlarge


Desiccants Twice the Performance

At ideal growing conditions refrigerant dehumidifiers can consume twice the power of equivalent desiccant dehumidifiers to get the same air drying capacity.

With Ecor Pro Desiccant dehumidifiers, more efficient air drying is achieved in the temperatures that the plants thrive in making them almost twice as efficient as refrigeration dehumidifiers in ideal growing temperatures.

Dehumidifiers for legal growing of cannabis?

Commercial legal cannabis growers will often use dehumidifiers in production to maintain 

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