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What Is Evaporative Cooling With Dry Fog?
Evaporative cooling uses the heat absorbed when water evaporates to lower air temperature. Every pound of water that evaporates absorbs roughly 1,000 BTU from the air.
Dry fog makes that process fast and clean: droplets of about 4.2 microns evaporate in the air, so the space cools and humidity rises with no water on surfaces. Air can never be cooled below its wet-bulb temperature, which is why the result depends on how dry the air is to begin with. Systems like this are sometimes called industrial cool mist humidifiers.
Benefits of Evaporative Cooling Humidifiers
Cooling and humidity from one system, on a fraction of the energy of compressors:
Better conditions for materials:
Cooler, steadier air protects heat- and dryness-sensitive materials and processes.
Lower energy than compressor cooling:
Evaporating water takes far less electricity than running compressors.
Lower maintenance:
No compressors or refrigerants in the humidifier, and no moving parts in the nozzles.
Longer equipment life:
Cooler intake air and steady humidity reduce heat and static stress on machinery and electronics.
More comfortable workers:
Lower air temperature and heat index in dry heat, without wet floors.
Scales with demand:
Add units as loads grow or seasons change.
Cooling Humidifier Systems
Humidity first, cooling as a bonus
Smart Fog systems are humidifiers. The cooling comes from evaporation, so they suit spaces where higher humidity is acceptable or wanted, and they work alongside, not instead of, air conditioning in humid climates.
Where Evaporative Cooling Saves the Most
1
Energy
1
Energy
Pre-cooling air before it reaches air conditioning coils or air-cooled condensers lowers the load on compressors. Bullets: Lower compressor load / Less energy per degree of cooling / Steady conditions / Works with existing HVAC
Each unit uses about 0.4 kW at full output and evaporates up to 25 lb of water an hour, absorbing roughly 26,000 BTU an hour, a little over 2 tons of cooling effect. Bullets: About 2 tons of cooling effect per unit / About 0.4 kW per unit / No refrigerants / Predictable running costs
2
Cost
2
Cost
3
Dry Surfaces
3
Dry Surfaces
Because the fog is absorbed into the air, the space cools while floors, product and equipment stay dry. Bullets: Uniform coverage / No wet spots / No mineral residue with purified water / Humidity held at your setpoint
Controls hold humidity at your chosen limit, so cooling never pushes the space into condensation, and systems are modular for future expansion. Bullets: Automated control / Customizable layout / Add units as you grow / Service about every two years
4
Adaptation
4
Adaptation
Cooling Humidifier Systems Spotlight
Every Smart Fog system cools as it humidifies. The most popular:
ES100
Direct
Space
ES100
A wall-mounted direct space humidifier for cooling and humidifying a room or zone, with no ductwork.
TS100
An in-duct humidifier that humidifies and pre-cools supply air for a whole building or process area.
TS100
In-Duct
Humidifier
ES100M
Mobile
Humidifier
ES100M
The ES100 on wheels, for spot cooling and humidity wherever it is needed.
FAQs
Will a cooling humidifier leave white dust?
Not with proper water treatment. Smart Fog’s dry fog does not aerosolize minerals the way low-grade ultrasonic units can, and running on purified water, such as reverse osmosis or a ZeroTDS system, leaves no residue on equipment or surfaces.
How much cooling can a humidifier provide?
It depends on how dry the air is, because evaporation cannot cool below the wet-bulb temperature. In hot, dry air the effect is large: 100°F at 15% RH can come down to about 80°F. In humid air it is small: 90°F at 60% RH comes down to about 83°F.
Does evaporative cooling work in humid climates?
Less well. The drier the air, the more cooling you get. In humid conditions, pair it with air movement and conventional cooling, and use it mainly where the added humidity is useful.
How much energy does it use?
About 0.4 kW per unit at full output, while evaporating up to 25 lb of water an hour, roughly 2 tons of cooling effect. There are no compressors or refrigerants in the humidifier.
How is Smart Fog different from swamp coolers and misting systems?
Swamp coolers pass air through wet pads with fans and need regular pad maintenance. Misting systems spray larger droplets that can wet surfaces. Dry fog evaporates before it lands, and its controls hold humidity at a set limit.