February 09, 2017


Bumper Crop: C02 in the Garden

Nothing makes the indoor gardener happier than a large, healthy crop—beautiful green leaves, healthy and colorful fruits and vegetables, heavy and aromatic flowers.  But no matter what you are growing, the limiting factors to crop health and overall production are the same:  nutrient, climate, lighting, pest control.  Every plant has different requirements for optimum health, but these four factors can make or break a harvest in any gardening scenario.

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Creative Control: Out of the Box Cooling Solutions for the Summer Garden

Summer brings with it so many wonderful things. Lake and beach time, fireworks and barbecue, sun and…heat. Summer can present quite a challenge for most indoor gardens, as the skyrocketing outdoor temperatures affect the temperature in the garden significantly. 

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Water Culture Systems in the Greenhouse

One of the joys of greenhouse gardening is the options it provides us in how we choose to garden.  They types and numbers of plants that will thrive in a greenhouse environment are nearly endless, as are the gardening methods we can use.

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In Control: A guide to achieving the perfect climate

As every gardener knows, hydroponic and indoor farming can present a number of challenges.  Cycle after cycle, it seems that there are always obstacles that have to be overcome.  Every harvest, we challenge ourselves to do better next time.  Regardless of the hurdles, we keep at it, and eventually we usually get it right.

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Total Control: Choosing the Right Cooling System

So you've decided to build a new garden.  Oh, the choices you have to make!  What kind of reflectors, bulbs, ballasts?  How many plants will fit in the space?  Do you want to use a hydroponic system or traditional dirt methods?

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Hydro Innovations, Expert in Heat Control

Hydro Innovations is a young, dynamic company started and owned by an experienced indoor gardener. As our name implies, we believe that there are a lot of "thinking out of the box" innovations that can be made to improve indoor gardening, primarily in the area of heat control, which is...

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Can water absorb heat better than most substances?

Water is a one-of-a-kind substance for many reasons. An obvious one is its unique ability to absorb heat. Water is able to absorb heat - without increasing much in temperature - better than many substances This is because for water to increase in temperature, water molecules must be made to move faster within the water; this requires...

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Grow All Summer: Water-Cooling Explained

A water-cooled system is a complete cooling package that can have several components. It generally consists of water lines connected from a chilled reservoir or fresh water source to various heat exchangers, water-cooled lighting vessels, ballast cooling enclosures and/or CO2 generators...

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Chillout : Water Chillers Explained

Let`s start with chiller basics - what is a water chiller and why would a person want one? A water chiller does just what its name implies - it cools water. Chillers are used in indoor gardening for a wide range of applications including nutrient cooling and watercooled equipment such as CO2 generators, dehumidifiers, air conditioning...

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Design: WC Room

This is an 8 light system that can be used with any size bulb. Water is pumped from the reservoir and pressurizes the supply manifold which pushes water through the Ice Box heat exchangers and any other water-cooled equipment that you are using. Air is passed over the Ice Boxes which warms the water before returning back to the reservoir via...

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Circuit: Water Chiller Refrigerant Circuit

Water Chiller Refrigerant Circuit.

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Considering your Regional Climate when Choosing Equipment for Cannabis Cultivation

Here at Surna, we’ve been designing facilities for indoor cultivation for close to 10 years and we’ve been excited to watch as new states begin coming online and more people reach out to us for guidance in designing their cultivation facility. Over and over, we get asked about what kind of equipment grower’s need and our response is always “it depends”. This can be confusing sometimes but designing the ideal environment means thinking about your grow holistically and considering everything from your growing style to temperature and humidity parameters to the types of lights being used to power capacity and more. But, one of the most important indicators of what type of equipment to choose is the physical location of your cultivation facility. With so many diverse climates in the United States, cooling and dehumidification needs vary vastly from region to region. So, we’ve gone ahead and highlighted some of the major regions of the country and detailed options to consider when choosing a cooling system.


Hot, dry climates (Arizona, Nevada, Southern California)

In these climates, we absolutely recommend indoor, sealed cultivation. While greenhouses are a great way to save energy on lighting, using the sun as your primary source of light means astronomically high solar gains– and thus, heat. Add on to that the incredible temperatures these regions experience most of the year and it is simply not economical to use sealed cooling in your greenhouse. Instead, growers end up having the vent the greenhouse with outside air at least some of the time, which can be counterproductive for most of the year due to high temps. In order to ensure a controlled, cool environment in these regions, we really recommend indoor or hybrid facilities (Check out our new hybrid facility design which gives you all the control of an indoor grow while using 60% less energy!!)

The other big issue is determining how much tonnage is needed. If you don’t already know, cooling systems are quoted by tonnage; however, what a lot of people overlook is that the tonnage quoted is done so at a specific temperature parameter– usually around 80F. However, when temperatures rise into the high 90s and even the 100s, chillers (regardless of the brand) are de-rated and begin functioning at a lower tonnage. For example, any 100 Ton chiller in Phoenix in July really becomes a 85T chiller. So, it is important to consider the de-rating of your equipment and be sure you get enough tonnage to cover your needs on the hottest day of the year.


Humid climates (Western Washington and Oregon, Northern California, Northeastern United States)

Humid climates present a similar issue for greenhouses as those in hot climates. Again, because of solar gains, it is usually not economical to seal and cool greenhouses completely and so growers resort to bringing in outside air. Because the climate is so humid already, this venting makes it virtually impossible to control humidity levels and creates a perfect environment for mold and fungus to grow. Bringing in outside air also means bringing in any bacteria or mold spores that are around the area, putting your crops at further risk. For that reason, we again recommend indoor or hybrid facilities. 

Whichever way you choose to cultivate, the major consideration here will be your level of dehumidification. Often, growers underestimate how much dehumidification they need. The rule of thumb is that you should be removing the same amount of water that you put in. All dehumidifiers are rated based on how many pints per day they can remove but, like chillers, they are rated at a specific level (around 80F and 60%RH) and de-rate when they drop below that point. Because humidity is a constant moving target, we recommend you ask an expert to help you determine exactly what you need.


Cold Climates (Alaska, Colorado, Canada, Michigan, Northeastern United States)

There are some benefits to cultivating in colder climates. For one, Surna chillers work pretty efficiently in colder climates. Second, you have the option of adding a dry cooler  into your cooling system. A dry, or free, cooler is a compressor-less chiller that uses ambient conditions to cool the water inside. The compressor on a chiller has the greatest power draw and so bypassing it with a dry cooler can reduce energy consumption by up to 75%! So adding one of these is a no-brainer. 

In colder climates, it’s really most important that you use a cooling system that is designed for cold weather. Most of the traditional HVAC options out there are designed to cool your home, office, etc. when it’s hot outside and, thus, don’t work as well (and malfunction more often) in colder climates. A Surna hydronic cooling system is designed to cool warm rooms even when ambient conditions are below freezing. But, whichever way you decide to go, you should, at the very least, be sure that any chiller you use has a low ambient kit to keep it from freezing in low temperatures.


Surna has been designing equipment for indoor cannabis cultivation longer than any other climate control company out there. We’ve designed projects in almost every legal state and we’ve experienced first hand the unique challenges that each region presents. Get in touch with us today so we can help you design the right system for your location!

Brandy Keen
Brandy Keen


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