About Climate Control


Importance of Climate Control


Climate control plays a large part in the quality of product produced. With the proper climate control system, you can maximize productivity, quality and volume while simultaneously minimizing monthly expenses.

While every grower has their own desired settings, typically the ideal environment is between 78 and 84 degrees with 40 to 60 percent humidity. This can be difficult to maintain with traditional climate control systems. Because Surna’s climate control system is designed for the indoor garden, we are able to cool your garden to your desired temperature and control humidity while providing a host of other benefits.

Applications of Chilled Water Climate Control

Not a new technology, just re-imagined


Chiller and boiler systems are used worldwide for heating and cooling, especially in high-heat environments. In the US, they are used primarily in commercial spaces, but worldwide, they are increasingly being used for residential climate control as well as commercial buildings. In some areas, chiller systems are actually mandated by local building codes for buildings exceeding certain square footage due to their superior energy efficiency.

Chilled water systems are used in a variety of industries, including hotels, hospitals, universities, data centers and any situation where rooms need to be controlled individually.

Surna’s chiller systems have been installed in commercial gardens all over the world from South Africa and the United Kingdom to Australia and Costa Rica. They provide ultra-high efficiency and are extremely easy to install, offering far more flexibility in installation and use than traditional heating and cooling systems.

How Chilled Water Systems Work


Chilled water systems work by circulating water, not air, throughout a building. The closed-looped system ensures that no evaporation occurs.

With a chilled water system, there is no need to have a compressor for each air handler, resulting in much lower up-front costs for large systems. Instead, a single cooling reservoir is located inside the building with all compressors (chillers) located outside. The compressors work together to cool the reservoir, which acts a battery for stored cooling energy.

A chilled glycol-water mix is then pumped around the building to air handlers of varying sizes. The air handlers are controlled by a simple wall thermostat mounted inside the room, resulting in cooling and dehumidification even when the compressors are not in use.

As your cooling needs expand, simply add more cooling compressors to the same reservoir and pump water to new areas without redesigning the entire cooling system.

Benefits of Chilled Water Climate Control


More Flexibility

Water can be plumbed practically anywhere to add efficient cooling or heating, allowing climate control exactly where you want it.

Chilled water systems can even be designed to produce hot and cold water simultaneously without increasing energy costs to produce the hot water. This system design works great for facilities in cold climates that need to heat rooms while simultaneously cooling other rooms.

24-Hour Dehumidification

When cooling isn’t needed in a traditional HVAC system, there’s also no dehumidification happening, resulting in humidity spikes. Traditionally, you would then have to supplement that with additional dehumidification, which uses additional power.

Surna’s chilled water climate control systems offer a 24-hour dehumidification option where the only energy used comes from the use of a fan. This system helps maintain consistent humidity and avoid detrimental spikes.

Mold Reduction

Surna’s system provides 24-hour dehumidification, eliminating humidity spikes. With traditional cooling methods, humidity control is only provided while active cooling is being provided, resulting in humidity spikes at night. The extra moisture in the air can cause mold to grow on the plants. Surna’s system provides dehumidification even when cooling is not taking place, eliminating night time humidity spikes and keeping moisture in the air at a consistent level all day.

More Efficient

Surna water-chilled climate control systems use a water-glycol mixture in their evaporators to exchange heat instead of air like traditional systems do.

Water has 20x the heat absorption rate and 4x the heat capacity of air. This means water can hold 4x as much heat as air and can absorb it 20x faster. This allows water chillers to remove more heat with the same amount of power, resulting in cooling that is more energy efficient than traditional HVAC.

Because of the heat absorption rate of water, the water in a water-chilled system stays cooler longer than air would. Cold air is then delivered to the desired locations as long as the water is cool, without the compressor on the chiller even running.

Room Isolation

Water Cooling allows you to create a “sealed room” garden. This system used pipes to transfer liquid throughout the facility, instead of ducts to transfer air. This difference means that no holes are cut in the room to duct air, making it possible to more accurately control the internal environment and avoid sharing air from one room to the next. Additionally, CO2 is not sucked out of the room, odors are contained and internal garden variables are more easily controlled.

Added Redundancy

With Surna’s climate control system, the chillers are not directly connected to the air handlers in the rooms. Instead, they are each connected to a reservoir of liquid that is pumped throughout the building.

Because the chillers are not directly connected to the air handlers, it is easy to add additional cooling capacity to a system. This additional capacity can be used to increase the overall cooling load of the system during a building expansion or can be used to provide redundancy in case of equipment failure. This allows for full system redundancy at a fraction of the cost as HVAC, giving you peace of mind.