250-400 CFM Horizontal Conditioner


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This unit is specifically designed to provide 250-400 CFM of conditioned air to small rooms and reach-in chambers.

Since this generating unit is self-contained, it can be easily used to condition existing spaces, small walk-in rooms, and custom chambers. The size of this unit allows it to sit on top of existing chambers or rooms and circulate conditioned air through the contained space.

The 250-400 CFM unit is one of our smaller conditioners and is designed to easily connect to the conditioned space. This unit does not require compressed air or ultra pure water (tap water is generally fine). The interior and exterior are constructed of corrosion-resistant stainless steel. Low watt-density heaters also contribute to the unit’s durability. Various safety devices are also included.

The conditioner is controlled by Parameter’s Smart Pad, a user-friendly system that provides optimum accuracy and control. The Smart Pad is equipped with direct readings for both temperature and humidity. It also features 60 segment programming for automatic cycling. High-low or deviation alarms and serial communications port (with software) are standard.

To download product specifications pdf, click here.



The 250-400 CFM Horizontal Conditioner is designed to produce very precise humidity and temperature control for small rooms and reach-in chambers. This unit is designed to be able to sit on top of existing chambers or rooms and circulate conditioned air through the contained space.

Features and benefits of the 250-400 CFM Horizontal Conditioner, series 9324-3150, include:

Precise temperature and humidity control
High grade temperature compensated humidity sensor
Stainless steel construction
High-low or deviation alarms
Compact package
Variable speed condenser fan that automatically adjusts to ambient and load changes
Variable speed process fan for pre-validation airflow adjustments
Direct coupling to exterior room wall to conserve floor space with no exterior ducting
Consistent and accurate results
Confidence in the measured condition
Security and safety
Easy application


10 or 25 cubic foot Parameter reach-in chamber.
Existing reach-in chambers.
Walk-in rooms (existing or provided by Parameter).

RH Variables

RH Variables Parameter Competition
Total ± 2.5% ± 6.0%
Control Constancy ± 0.5% ± 2.0%
Chamber Uniformity ± 1.0% ± 2.0%
Sensor Accuracy ± 1.0% ± 2.0%


Relative Humidity Control: ±0.5%
Relative Humidity Uniformity: ±0.5%
Relative Humidity Accuracy: ±1.0% 
Relative Humidity Range: 20 to 93% 
Temperature Control: ±0.1°C 
Temperature Uniformity: ±0.2°C
Temperature Accuracy: ±0.2°C 
Temperature Range: 5 to 50°C


Domestic: 208/230V, 1-Phase, 60HZ, 14.7 FLA, 9 RLA
International: 230V, 1-Phase, 50Hz, 11.9 FLA, 9 RLA 
Water: 3 gallons per day maximum 
(can be manually refilled without hard piping) 
Drain: For condensate and PM

Weight & Dimensions


320 lbs.


400 lbs.


30”w x 34”d x 21”h

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