Custom High Air Exchange Walk-In Room

Industry: Consumer Packaged Goods

Testing Application: Environmental Stability and Airflow Performance for Household Fragrance Devices

A prominent company in the consumer packaged goods sector approached Associated Environmental Systems (AES) in need of a specialized walk-in environmental test chamber to validate the performance and reliability of plug-in scented oil fragrance diffusers.

The challenge? The client required testing for over 100 active units concurrently, each generating a live load. Additionally, the application called for strict humidity regulation (40–60% RH) and a high continuous fresh air exchange rate of 25 air changes per hour (320 CFM) without destabilizing internal ambient conditions or straining laboratory HVAC systems.

The AES Solution

AES engineered a 191 cu ft Modular Walk-In Chamber, a high-performance, custom-built system designed to deliver precise environmental control under continuous high-volume air exchange conditions.

• Air Exchange System: Integrated manual fresh air flush system featuring an inlet opening and powered exhaust blower capable of pulling 320 CFM of air through the chamber to facilitate 25 air changes per hour while utilizing facility ambient air to optimize thermal efficiency.
• Precision Thermal & Humidity Simulation: Engineered to maintain ambient temperature operation with a stability of ±0.5°C and 40–60% RH (±2% RH fluctuation) using a 4 hp single-stage mechanical refrigeration system (R-449A), low watt density ceramic-core electric heaters, and a remote rooftop condensing unit.
• AESONE CONNECT® & Watlow F4T Integration: Equipped with a F4T touchscreen programmable controller and AESONE CONNECT® software, enabling seamless remote monitoring, real-time data logging, and automated profile control from a customizable digital dashboard.
• Modular Walk-In Architecture: Constructed with 22-gauge Type 304 #4 stainless steel interior walls, stucco-embossed galvanized white exterior panels, a generous 5'-2" W x 5'-2" D x 7'-2" H internal workspace, and an expansive 48" W x 96" H chamber door for effortless sample loading.

Crafting Your Perfect Test Set-Up

This solution was custom-engineered to meet consumer product safety and fragrance diffusion testing demands under continuous live heat load and high air-turnover conditions. By combining modular panelized construction, precise PID heating and refrigeration controls, and dedicated fresh-air exhaust systems, AES delivered a chamber that seamlessly integrates with existing facility airflow, accelerates development cycles, and ensures accurate product validation under real-world operating conditions.

This project highlights AES’s commitment to designing advanced, customized test solutions that help engineers push boundaries—supporting innovation in the consumer packaged goods sector and beyond.