Humidity control

Why Industrial Humidity Control Matters

In many industrial and commercial environments, maintaining the right humidity level is not a comfort issue — it is a production-critical requirement. Too dry, and static electricity builds up, products shrink, crack or lose quality. Too humid, and condensation damages equipment, promotes mould and disrupts sensitive processes.

High-pressure nebulization provides precise, energy-efficient humidity control for environments where conventional humidifiers are impractical or too slow to respond. Operating at 70–120 bar, the system produces droplets below 10 microns — so fine they evaporate instantly into the air without wetting surfaces, products or people.

Applications: Where Precise Humidity Control is Critical

• Cold storage & fresh produce — maintain 85–95% RH to prevent shrinkage and weight loss in fruit, vegetables and cut flowers. Direct savings on product value.
• Printing & packaging — paper and film are highly sensitive to humidity. Maintain 45–55% RH to prevent static, curling, misfeeds and print defects.
• Textile manufacturing — fibres and yarns require consistent moisture levels to maintain elasticity and prevent breakage.
• Wood & furniture production — timber must be conditioned at controlled humidity to prevent warping, splitting and dimensional change during machining and finishing.
• Mushroom & specialty crop cultivation — precision humidity is fundamental to yield and quality in controlled-environment agriculture.
• Electronics & cleanrooms — static discharge prevention requires consistent relative humidity above 40–45%.
• Museums & archives — artefact and document preservation requires stable humidity within tight tolerances year-round.

Technical Advantages of High-Pressure Nebulization

• Instant evaporation — droplets below 10 microns become vapour before reaching surfaces. No condensation, no dripping, no wet zones.
• Precise control — systems integrate with hygrostat sensors for fully automatic on/off operation, maintaining target RH within ±2–3%.
• Energy efficient — uses a fraction of the energy of steam or ultrasonic humidifiers, especially at scale.
• Scalable — from a single cold store room to a multi-zone production floor, systems are modular and expandable.
• Low maintenance — stainless steel nozzles and high-quality pump components ensure reliable, long-term operation.

System Specifications

• Operating pressure: 70–120 bar
• Droplet size: <10 microns — immediate evaporation, no surface wetting
• Humidity range: controllable from 40% to 98% RH depending on ambient conditions
• Control: hygrostat (±2–3% RH accuracy), optional climate computer integration
• Nozzle materials: stainless steel anti-drip nozzles — corrosion-resistant for food-safe environments
• Water treatment: RO filtration recommended to prevent mineral deposits
• Power: 230V single-phase or 400V three-phase depending on system scale
• Warranty: 2 years, manufactured in Italy

How Much Does Industrial Humidity Control Cost?

The cost of a high-pressure nebulization system depends on the size of the space, the target humidity range, and the number of zones. As a general guide, you can expect the following investment levels:

For a single cold store or warehouse room (up to 500 m²), a complete system including pump, nozzle lines, hygrostat and filtration starts from approximately €3,000–€6,000. Installation by your own technical team is typically completed in one day.

For larger multi-zone installations (500–5,000 m²) — such as a printing facility, textile plant or mushroom farm — systems are sized individually. Investment typically runs to €8,000–€25,000 depending on the number of zones and control complexity.

In addition, steam humidification systems carry high energy costs, use hot surfaces, and create condensation risks. Ultrasonic systems require frequent filter replacement and leave mineral scale deposits. High-pressure nebulization, by contrast, offers significantly lower running costs and greater scalability — at comparable or lower capital investment.

Compared to steam humidification (high energy cost, hot surfaces, condensation risk) or ultrasonic systems (scale deposits, filter replacement, limited capacity), high-pressure nebulization offers significantly lower running costs and greater scalability at comparable or lower capital investment.

Request a sizing calculation and indicative quote for your facility: +31 85 273 3970 | info@fogsystems.eu

Sector Spotlight: Cold Storage & Fresh Produce

Cold storage facilities for fruit, vegetables and cut flowers must balance two critical requirements: low temperature and high humidity. Refrigeration equipment cools the air efficiently, but it simultaneously dries the air — and as a result, produce loses moisture, weight and shelf life.

High-pressure nebulization at 85–95% RH prevents this moisture loss without the condensation problems associated with low-pressure foggers or evaporative pads. Droplets below 10 microns become water vapour before reaching produce, packaging or cold store walls — no dripping, no ice formation, no mould.

The commercial case is direct: 1% weight retention across a cold store operating at 80% utilisation translates to measurable revenue recovery. Payback periods of 12–18 months on the nebulization system are typical for produce distributors and wholesale operations. Our systems are active in cold stores across the Netherlands, Belgium and Portugal.

Sector Spotlight: Printing & Packaging

Paper and film are hygroscopic materials — they absorb and release moisture in response to ambient humidity. Consequently, humidity variation in an uncontrolled pressroom causes paper curl, static build-up, misfeeds and registration errors. The result is waste, downtime and costly reprints.

Maintaining 45–55% relative humidity in pressrooms and binderies eliminates these problems. High-pressure nebulization is particularly well-suited to printing environments because it adds moisture without raising temperature — unlike steam systems, which can affect ink drying and paper dimensions.

Systems are zoned to the paper handling and storage areas, leaving press rooms and UV curing stations unaffected. Hygrostat control maintains target RH within ±2–3% automatically, with no manual intervention required between shifts.

Sector Spotlight: Wood Processing & Furniture Manufacturing

Timber is one of the most humidity-sensitive materials in industrial use. Whenever the moisture content of wood changes in response to ambient humidity, dimensional change occurs — the material shrinks and swells. In furniture manufacturing, this directly causes joint failures, surface defects and rejection rates that affect margins.

Conditioning chambers and production halls where timber is stored, machined or finished benefit from consistent humidity control at 50–60% RH. High-pressure nebulization systems maintain this target throughout the working day, regardless of outdoor conditions or seasonal humidity swings.

For kiln-dried timber that must be held in acclimatised storage before processing, nebulization prevents the re-drying that occurs in uncontrolled warehouse environments — protecting the investment in the drying process and ensuring timber remains within specification when it reaches the production line.

Cold Storage: A Closer Look

Fresh produce stored at insufficient humidity loses moisture — visibly wilting and losing saleable weight. Studies show that 1% weight loss in a cold store translates directly to 1% revenue loss. High-pressure nebulization at 85–95% RH prevents this without the condensation problems associated with low-pressure systems.

Our systems are installed in cold stores across the Netherlands, Belgium and Portugal — from small artisan producers to large-scale distribution facilities. Payback periods of 12–18 months are typical due to reduced product shrinkage alone.

Frequently Asked Questions

Can I use tap water with a nebulization system?
We recommend reverse osmosis filtered water to prevent mineral scale on nozzles and the surfaces of products. Filter systems are available as part of our package.

How is humidity level controlled?
A hygrostat sensor continuously monitors RH and activates the pump when humidity drops below the set point. The system switches off automatically when the target is reached. Climate computer integration is available for multi-zone control.

Is the system food-safe?
Yes. We use stainless steel nozzles and food-grade tubing for cold storage applications. RO-filtered water and anti-drip nozzles ensure no contamination risk.

What water quality is required for a nebulization system?
Reverse osmosis (RO) filtered water is strongly recommended. Hard tap water contains calcium and magnesium minerals that deposit on nozzle orifices over time, reducing output and requiring more frequent cleaning. RO systems are available as part of our standard package and are sized to match the pump output. In areas with particularly hard water (above 15°dH), RO filtration is essential. Rainwater collection can also be used where regulations permit.

Can humidity control be combined with cooling?
Yes — and this is one of the key advantages of high-pressure nebulization over other humidification technologies. In warm environments, the same system that maintains target humidity also provides adiabatic cooling of 3–6°C, depending on ambient conditions. This dual function is particularly valuable in summer in printing facilities, food production and textile plants where both humidity and temperature need to be managed simultaneously.

How is the system controlled in a multi-zone facility?
Each zone operates independently via its own hygrostat sensor and solenoid valve. The central pump supplies the entire system at constant pressure; zone valves open and close automatically in response to the humidity reading in each zone. This means a cold store running at 90% RH and a packaging area at 50% RH can share the same pump infrastructure while maintaining independent targets. For larger facilities, integration with a building management system (BMS) or climate computer is available.

Discuss your humidity requirements with our engineers: +31 85 273 3970 | info@fogsystems.eu

Technical approach

High-pressure nebulisation at 70+ bar produces droplets in the 5–10 micron range. At this size, water evaporates into the air rather than settling on surfaces — raising relative humidity without wetting products, equipment, or floors. Systems can be controlled by humidity sensors and climate computers for fully automated operation.

Typical applications

Cold storage and logistics (preventing moisture loss in perishables), printing and paper production (static and curl control), mushroom cultivation and propagation, food processing, and tobacco storage. Also used in industrial settings where static charge is a problem.

Component supply for dealers

Fogsystems.eu stocks the full TECNOCOOLING range for humidity control installations: high-pressure pumps, stainless steel nozzle sets, humidity sensors, solenoid valves, and climate controllers. Dealer pricing available on request.