HVAC Humidification System Efficient HVAC Systems

A client came to Smart Fog® with a large-scale project for an in-duct humidification system for their building’s HVAC system. The existing humidification system was experiencing frequent failures, affecting the entire HVAC system and creating havoc with building temperature and humidity. This situation was potentially harmful to personnel and equipment. Smart Fog® set about correcting the matter by installing a humidification system consisting of 7 units, each unit designed to maintain an overall temperature of 60° Fahrenheit and a relative humidity of 60%. In addition, we included a mesh screen water filter with each unit to offset the high silica levels that were plaguing the HVAC.

Upon full implementation, the improvements were quite remarkable. Unit capacities ranged from 76 lbs./hr. to 700 lbs./hr., exceeding project requirements by maintaining temperatures as low as 50° Fahrenheit. In addition to the ES100EX humidification units, we supplied all required secondary equipment: sensors, pipes and fittings, and a CPLC unit. The modular design of this system enabled our client to account for future facility modifications by reconfiguring the units and setup.

We are happy to work with customers to design custom solutions like this one for any humidification application. For more information, please contact Smart Fog® today to get details on our full design and equipment services.


HVAC Humidification System Project Highlights

Product Description We built this humidification system for a HVAC application
HVAC Specifications 1 units 25,000cfm 100% Water Capacity: 700lbs/hour / 58 – MS100 / 50 °F+1 units 22,000cfm 100% HVAC2: 600lbs/hour / 50 – MS100 / 50 °F+5 units mixed 25,000cfm 3,000cfm fresh 76lbs/hour each / 10 – MS100 / 50 °F+
Maintained Temperature 60˚F
Relative Humidity Required 60%
Characteristics Water Filtration

  • Used because Water Has High Silica Level
Components Used – ES100EX
– CPLC Control
– ES100PB1
– S1 Relative Humidity Sensor
– ZeroTDS Water Filter System
– Pipe & Fittings Kit
Detailed Specifications CPLC Controller Program included in this solution: Standard program with optional air pressure sensor.PLC Control Specifications:

4 Analog inputs, 7 Transistor Outputs, 2 Lines x 16 characters, STN LCD, LED backlight HMI Displays, 24 VDC power supply.ES100PB1 includes: 640 L/min air filter set, 130 mesh screen water filter and air control electric valve.Relative Humidity Range: 0 to 100% RH
Temperature Range: -40 to 140°F (-40 to 60°C)
Accuracy, RH: ±1 %
Accuracy, Temp Models with 4-20mA Temp. Output: ±0.9°F @ 72°F (±0.3°C @ 25°C)
Accuracy, Temp Models with Passive Thermistor Temp Sensor: ±0.4°F @ 77°F (±0.22°C @ 25°C)
Hysteresis, RH: ±1%
Repeatability, RH: ±0.1% typicalTemperature Limits: -40 to 140°F (-40 to 60°C)
Storage Temperature: -40 to 176°F (-40 to 80°C)
Compensated Temperature Range, RH: -4 to 140°F (-20 to 60°C)4-20 mA Loop Powered Models:
Power Requirements: 10-35 VDC
Output Signal: 4-20 mA0-10 V Output Models
Power Requirements: 15-35 VDC or 15 –29 VAC
Output Signal: 0-10 V @ 5 mA max

0-5 V Output Models:
Power Requirements: 10-35 VDC or 10–29 VAC.
Output Signal: 0-5 V @ 5 mA max

Response Time: 15 seconds

Electrical Connections: Removable screw terminal block
Drift: <1% RH/year
RH Sensor: Capacitance polymer
Temperature Sensor: 4-20 mA Output, Solid State Band Gap. Passive

Output: 10K @ 25°C Thermistor (Dwyer curve A)
Enclosure: ABS

Enclosure Rating: Designed to meet NEMA 3S (IP54)
Weight: 0.3 oz (8.5 g)
Agency Approvals: CE

Industry of Use HVAC
Application Name HVAC Humidification System

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