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Rapid Engineering, Inc. pioneered the development of Air Management Systems using direct-fired heating more than 40 years ago. Today, our 4000 Series air handlers efficiently establish and maintain a slightly pressurized condition in your facility as we gently temper outdoor air and, as appropriate, mix it with existing indoor air. Rapid Air Management Systems with Intelligent Controls gives you everything you need to improve your indoor air quality and provide total comfort. Learn more about taking control of your building's air requirements.

For these types of facilities...

• Warehouses & distribution centers
• Manufacturing facilities
• Sports arenas
• Domed stadiums
• Foundries
• Airplane hangars
• Steel warehouses
• Commercial kitchens
• Food processing plants
• Vehicle maintenance facilities
• and many others

...these major benefits!

• Improved Indoor Air Quality (IAQ)
• Convenient operation
• Consistent building temperatures
• Increased energy efficiency
• All-season ventilationcapability

To see some Series 4000 typical installation configurations, click here.

To see illustrated views of the Series 4000's model configurations, click here.


Rapid's 4000 Series Offers Many Benefits

Improved indoor air quality

Rapid’s direct-fired 4000 Series air handlers dilute and expel airborne contaminants and make exhaust systems operate more efficiently, enabling your facility to meet even the toughest IAQ standards.

Superior ventilation

The 4000 System greatly decreases heat build-up in warm weather. And the system automatically adjusts outdoor air volume from 100% to 20% to meet ventilation requirements in cold weather.

Consistent temperatures

You will experience far less stratification and more consistent temperatures throughout your facility when heating with the 4000 System, thanks to low-temperature discharge air and a slightly pressurized building. And in hot seasons and climates, optional cooling effectively reduces indoor air temperatures to keep people and processes productive.

Ease of management and control

Rapid’s computer-based Intelligent Control system provides you with the information you need to manage your system more effectively. It’s simple to learn and easy to operate.

Cost savings

You’ll realize energy savings of 20% to 40% over indirect heating systems with the 4000 Series burner, which delivers 100% of the heat generated into the building. Rapid’s evaporative cooling systems are very inexpensive to purchase and operate, and our mechanical refrigeration systems produce efficiencies among the highest in the industry.

Flexibility and convenience

Installations of Rapid heating systems require little or no ductwork, while our evaporative cooling systems need no condensers, chillers, water towers or distribution piping. This makes them easy to install, operate and maintain, while giving you more space for manufacturing or storage.

Intelligent Controls

Intelligent Controls are the nerve center of the air management system. They give the building operator a direct link to all Rapid 4000 Series air handlers, providing a simple, effective means of operation.

Each air handler is controlled by a DDC module using Rapid’s proven, industry-applauded software. Not only is it reliable, we’ve stuffed it with dozens of features that are optional or unavailable in other systems. Combine our extensive standard features with state-of-the-art simplicity and you have a very powerful building management ally! Learn more about the manner in which Rapid allows you to take control of your building's air requirements.


For a detailed look at a 4000 Series air handler, click here.

For a list of the 4000 Series options, click here.

Request information: online or at 800-536-3461

Download these 4000 Series materials:
General product information (8 pages) 156k
4000 Series Advantages (2 pages) 940k
Air Management & Intelligent Controls (8 pages) 396k
Dimensions Guide (12 pages) 248k
Equipment Specifications (8 pages) 92k
Selection Guide (4 pages) 100k
4000 Series Startup Sheet (4 pages) 56k
Also online: 4000 Series Technical Support Documentation