EZ Modified Downdraft Paint Booth
Clean, Consistent Results for Automotive & Industrial Spray Applications
The RTT EZ Modified Downdraft Paint Booth draws fresh air from the cleaner upper levels of the shop through a ceiling-mounted filter bank near the product doors. That filtered air travels down through the spray zone and into an exhaust filter system at the opposite end of the booth – keeping overspray moving away from the operator and toward the exhaust wall throughout the finishing cycle. The design suits industrial, automotive, and wood finishing applications and supports solid back or drive-through configurations in pressurized, non-pressurized, and pre-filtered variants.
Every EZ Modified Downdraft booth ships with high-efficiency W-Series RP Paint Arrestor blanket filters secured by RTT’s FilterLoc technology, which creates a tighter seal to the booth frame to eliminate overspray bypass and simplify filter changeouts. E-Light LED fixtures – available in 4,000 and 8,000 lumen models – provide code-compliant illumination rated Class 1 Division 2 (Groups A, B, C, D) and Class 2 Division 2 (Groups F and G), with no safety interlock required. An optional air solenoid valve interlocks the exhaust fan with the spray equipment air supply.
Construction uses 18-gauge prime-quality galvanized steel with precision-punched panels and support members for nut-and-bolt field assembly. Standard model EMD-14-09-26 is available in non-pressurized, pressurized, and pre-filtered configurations with a 5-day lead time after order acknowledgement.
Features
- Modified downdraft airflow: ceiling intake filter bank near product doors; exhaust filter system at opposite end
- 18-gauge prime-quality galvanized steel construction; precision-punched panels and support members; nut-and-bolt assembly
- Available in solid back or drive-through configurations
- Available in pressurized, non-pressurized, and pre-filtered variants
- High-efficiency W-Series RP Paint Arrestor blanket exhaust filters included standard
- FilterLoc filter retention technology seals filters to booth frame; eliminates overspray bypass
- Brand-name tubeaxial fans and motors
- 36″ wide personnel door: square tube frame, 18-gauge galvanized steel skin, observation window, field-adjustable slotted hinges (two-axis adjustment)
- 5-year warranty
- Meets and exceeds all applicable OSHA and NFPA regulations
Benefits
- Move overspray consistently away from the operator — modified downdraft airflow draws contaminated air from the ceiling filter bank down through the booth and into the exhaust wall, keeping the spray zone clean throughout the finishing cycle.
- Eliminate overspray bypass at the exhaust filter – FilterLoc technology seals W-Series RP Arrestor filters directly to the booth frame, preventing unfiltered air from escaping around the filter media.
- Reduce lighting maintenance costs – E-Light LED fixtures carry a 5-year warranty, require no safety interlock, and consume less energy than fluorescent alternatives.
- Cover your booth with a 5-year warranty – the longest warranty in the paint booth industry.
- Reduce installation time – precision-punched panels and support members bolt together in the field without custom fabrication or special tooling.
- Scale airflow to the application – pressurized, non-pressurized, and pre-filtered configurations let you match the booth to your facility and process requirements.
- Add a heated air makeup unit without redesigning the booth – the modified downdraft design accommodates an intake plenum with fan or AMU as a direct addition.
Sizes & Specifications
RTT can design and build spray booths in a variety of sizes and configurations. Although our team can engineer a custom booth to fit your needs, below are standard sizes that are quickly available to you.
| Model Number | Interior Dimensions | Exterior Dimensions | Access Doors | Qty. Lights |
Airflow SCFM |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Width | Height | Length | Width | Height | Length | Qty | Clear W | Clear H | Type | |||
| *EMD-14-09-26-N-SB-S | 14' | 9' | 26' | 14'6.5" | 10' | 26'4" | 1 | 9'4" | 8'10.5" | Solid | 10 | 12,600 |
| EMD-14-09-26-P-SB-S | 14' | 9' | 26' | 14'6.5" | 11'2" | 26'4" | 1 | 9'4" | 8'10.5" | Solid | — | 12,600 |
| *EMD-14-09-26-F-SB-S | 14' | 9' | 26' | 14'6.5" | 11'2" | 26'4" | 1 | 9'4" | 8'10.5" | Solid | 10 | 12,600 |
* 5-Day Lead Time After CEFS Order Acknowledgement — only for these items without any modifications. Any additional items on the order may impact lead time. This list may change periodically.
Lighting
Every EZ Modified Downdraft booth ships with E-Light LED Lighting. Fixtures are constructed from 22-gauge powder-coated white steel and are available in 4,000 and 8,000 lumen models. E-Lights are ETL-listed for the US and Canada, rated Class 1 Division 2 (Groups A, B, C, D) and Class 2 Division 2 (Groups F and G). Because E-Light fixtures meet spray booth safety requirements by design, no safety interlock is required – reducing installation cost and ongoing maintenance. Lighting levels are calculated and engineered using photometric software. E-Light fixtures carry a 5-year warranty.
Control Panels
RTT offers pre-wired motor starters, UL-listed control panels, VFD controls, and optional touchscreens to simplify operation, fan speed adjustment, and booth balancing. All panels feature a single-point connection for quick and easy installation.
UL Listed Standard
- Control Panels
Magnetic Motor Starter
- Control Panels
SmartTouch Touchscreen
- Control Panels
Variable Frequency Drive
- Control Panels
Paint Booth Filters
RTT offers a wide range of replacement paint booth filters — built from virgin paper materials and stocked for fast lead times. Whatever your application or filtration efficiency requirement, we have a solution ready to ship.
3200 Spra-Gard High Efficiency
- 3XXX-Series RP Paint Arrestors
3300 Spra-Gard High Efficiency
- 3XXX-Series RP Paint Arrestors
3400 Spra-Gard High Capacity High Efficiency
- 3XXX-Series RP Paint Arrestors
W-5000 High Efficiency
- W-Series RP Paint Arrestors
W-5100 Ultra Efficiency
- W-Series RP Paint Arrestors
W-5200 High Capacity Ultra Efficiency
- W-Series RP Paint Arrestors
Services
RTT provides end-to-end services tailored to every phase of your project, so you never have to look further than one trusted partner.
Custom Engineered Solutions
Ductwork
Installations
Maintenance
Product Training
Help and Support
Access the resources, documentation, and technical support information you need to keep your RTT equipment operating safely, efficiently, and at peak performance.
Product Literature
Frequently Asked Questions
When Should I Change the Filters on My Spray Booth?
When it comes to determining when to change your spray booth filters, first we must differentiate between intake filters and exhaust filters. Intake filters are located where the outside or shop air is introduced to the spray booth working environment. These filters work to ensure that the air introduced into the spray booth is free from debris, which can cause defects in your coatings. Exhaust filters are in separate locations, depending on the design and construction of your spray booth. The primary function of these filters is to capture overspray from the booth working environment and prevent harmful and hazardous particulates from being exhausted into the atmosphere by the booth exhaust fans. The function of both filter types is paramount to the spray booth functioning properly and ensuring the best possible coating finish. Spray booths are designed to meet National Standards, such as OSHA and the NFPA.
When filter maintenance is neglected, the performance of the spray booth will fall below the standards’ requirements. When the spray booth performs below the designed param¬eters, proper airflow will not be present and the likelihood of overspray or dust to accumulate on the coated part increases exponentially. Because there are many different filter constructions available, it is difficult to mandate a certain time interval for filter change outs. There are many other factors that play a part in the life span of the filters, including cleanliness of the surrounding environment, type of coating being sprayed, application styles and equipment used, spray booth air speed, spray booth design and construction and design of the filters can all affect the life of the filter. However, there are some key indicators that your filters are coming to the end of their effective life span:
Intake Filters:
• When an increase in debris or dust is noticed in the booth or in the coatings.
• If you have a manometer or Magnehelic gauge to measure pressure, drop through the filter, change at the suggested loading of the manufacturer.
• Filters have been installed for six months.
Exhaust Filters:
• When overspray is noticed to be lingering in the booth more than usual.
• The spray booth fan is operating at 100% capacity.
• If you have a manometer or Magnehelic gauge to measure pressure, drop through the filter, change at the suggested loading of the manufacturer.
• Applying a coating that is capable of spontaneous combustion or other harmful compounds.
• Filters have been installed for one month.
It is best practice to establish a filter maintenance program with the help of RTT Finishing Solutions. Improper filter maintenance can affect more than just the finished coating. It can also affect the health and safety of your employees as well as the profitability of your business.
Where Should the Temperature Sensor Be Located on My Spray Booth?
RTT recommends that the temperature probe be in the discharge ductwork of the Air Make-up Unit (AMU). The probe is to be located as far from the discharge location of the AMU as possible before entering the paint booth intake plenum. This configuration helps to avoid sharp spikes in temperature and will even out the ramp and soak time of the burner. Eliminating the possibility of an over-temperature situation inside the AMU. In rare instances, the temperature probe may be in the intake plenum of the spray booth. Please consult with RTT Technical Support before locating the temperature probe anywhere other than the AMU discharge ductwork.
Why Are My Spray Booth Doors Being Blown Open?
This is typically caused by excessive incoming gas pressure affecting system balance. When gas pressure exceeds regulator ratings:
• Airflow and burner output become unstable
• The system may create positive pressure inside the booth
• Doors can blow open due to improper pressure differential
Check the valve train regulator, system gas pressure, and follow the manufacturer’s recommended pressure ranges.
My Spray Booth and Oven Controls Require a Password to Change Settings - What Is It?
CT/CTC AMU – All passcodes provided in the RTT Booth & AMU Detailed Start-up Guide).
Operator passcode is 2050
Oven – All passcodes in the Oven Operation & Maintenance manual. Maintenance passcode is 1111
My Exhaust Fan Is Not Running Even Though My Booth Has Power — What Could Be Causing It?
There could be several issues that could cause your exhaust fan not to operate. If you have confirmed you have power, do you have a fault on your Variable Frequency Drive (VFD)? Check to see if there is a fault code displayed on the VFD. Depending on the make and model of your VFD these codes can differ.
Additional Resources
Instructional Videos
Frequently Asked Questions
Support Center
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