DIY Hobby Spray Booth

May 06, 2017

DIY Hobby Spray Booth

DIY Hobby Spray BoothBuild Your Own Spray Booth

If you are a hands-on do it yourselfer, or just want a high quality spray booth, creating a spray booth yourself might be the right route for you. All you need are some basic tools, common materials, and at least a few hours.

We recently created our own hobby spray booth, it worked out very well for us so we created this article to show you how we did it. Choose the type of wood you prefer, follow the instructions, and start building your spray booth now.
Below we highlighted some benefits of the hobby spray booth we created.

Build Your Own Spray Booth

Hobby Spray Booth Specifications

  • 265 CFM exhaust blower, 115 volt, 1.9 amp, 1500 RPM. 
  • 7 foot long grounded power cord.
  • 24 gauge galvanized steel mounting panel for blower.
  • 24 gauge galvanized steel filter rack, for use with standard furnace replacement filter. 12" x 24" x 1"
  • 4 inch round exhaust duct outlet for easy venting (standard dryer vent)
  • 1/2 inch thick plywood for bottom, sides, back and front panels.
  • 1/4 inch thick plexiglass for top panel.


Choosing A Blower For The Hobby Spray Booth

This is the blower we used: 
Dayton Blower 6FHX9
We chose this Dayton blower because it is quiet and powerful. We ran comparison tests of many different blowers and fans, the Dayton 6FHX9 was the quietest, it held up the best against static pressure and won the best overall performance out of any other blowers of similar power (265 CFM). Also, we have received positive feedback about the blower from many readers that have used it in their booth.

We know that Grainger's retail pricing can be pretty expensive so we suggest you shop around, if cost is a concern. If you choose to use a different blower and your exhaust duct run is longer than 8 feet, make sure that it will hold up to static pressure similarly to the Dayton blower.

Make sure the important specs are similar to the image below.
Dayton Blower 6FHX9 Specs To Look For

Cording The Blower 

These types of blowers do not come corded so you will have to get a grounded power cord and cord it yourself. This process is extremely simple, it's literally just 3 wires; 1 positive, 1 negative and 1 ground. Don't worry you won't need any prior experience or knowledge of electricity to cord the blower. 


Fan Mount Panel

We used 24 gauge galvanized steel for the fan mount panel so that we could have top or bottom discharge just by flipping the panel. We externally mounted the blower so the motor windings would not be damaged by harmful paint and solvents.

DIY Spray Booth Mounted Blower For Top Exhaust DIY Spray Booth Mounted Blower For Bootom Exhaust DIY Spray Booth Mounted Blower Panel

Learn more about the Fan Mount Panel 


Square To Round Fan Adapter

When we built our spray booth we created our own square to round adapter. People started asking us where to get an adapter, so we started looking for an adapter that would work. After much research we came to the conclusion that there were no adapters commercially available that would properly transition from the square flange of the blower to a round duct outlet. This is when we realized that we could add value if we made this adapter commercially available.

This product enables the Dayton Blower 6FHX9 to be vented using standard 4" inch diameter circular duct. This adapter can be used with rigid, semi-rigid or flex duct.

Note: You must bend the flange flush with the blower housing for the adapter's bolt pattern to lineup properly.

Warning: It may not fit other blowers because flange sizes and bolt patterns vary.

Learn more about the Square to Round Fan Adapter 


Filter Rack

When we created the filter rack for our spray booth we used 24 gauge galvanized steel, we are aware that it won't be possible for most people to use this material. The filter rack can be made out of wood it could be the same plywood you use to build the booth.  See below if you want to buy a Vent Works steel filter rack. 

The cheap standard furnace filters work best, if you use an expensive allergen filter e.g. filtrate furnace filter it will restrict flow and cause inadequate ventilation. 


DIY Spray Booth Filter Rack Close UpDIY Spray Booth Filter Rack Assembly DIY Spray Booth Filter RackDIY Hobby Spray Booth Assembly


Learn more about the Filter Rack



We decided not to include internal lights in the booth itself, instead we used Plexiglas as the top panel. This way light would easily shine down into the booth and we would be able to quickly adjust the light depending on where we are and what we are doing. We recommend 1/8" to 1/4" Plexiglas, but you can use any translucent material. Local hardware stores should have something usable in stock but thickness, size, and materials may vary. We used a table saw to cut the material but a circular saw will work. Make sure to set the saw blade depth so it just clears the material or the material may split, crack, or chip.

 DIY Airbrush Spray Booth


Wood Alternative 

The spray booth used in this article was constructed using a Vent Works Filter Rack and Fan Mount Panel, but if you prefer you can make those parts yourself using wood. If you do use wood for the fan mount panel you will have to create the panel, cut the hole, drill pilot holes in the panel and in the blower, get proper hardware and weather seal.

Below are images of a booth built using the same plywood for the booth, filter frame, fan mount panel, and the top panel (instead of the Plexiglas).
Plywood Fan Mount Panel
Plywood Filter Rack



    Is this spray booth explosion proof?

    No, to be classified as explosion proof, a vapor proof motor and switches must be used. Explosion proof components are very expensive and would make this booth cost prohibitive. However, for an explosion to occur, the concentration of flammable vapor must be at or above its lower explosive limit (LEL). In most cases, if the fan is running before vapor is introduced, the concentration of vapor will be diluted and less than its LEL.


    Will the spray booth require maintenance?

    Yes, periodically filters should be replaced and ducts should be inspected for obstructions. This will ensure proper air flow which will reduce the risk of vapor buildup.

    How far can I run the exhaust duct?

    Exhaust ducting adds friction (resistance to airflow) therefore you should locate the booth as close as possible to the exhaust termination. Vent Works recommends no more than 15 feet of exhaust duct when possible.

    Where can I buy exhaust vent pipe?

    The hobby spray booth that we created has a 4 inch round exhaust outlet that can be vented with standard dryer vent ducting, which is readily available at most hardware and home improvement stores.


    Will the exhaust air from the spray booth damage vegetation near the exhaust outlet?

    No, if the booths filter is in place and properly maintained, over-spray and particles will be removed with no damage to plant life.



    Cut List & Assembly

    DIY Airbrush Spray Booth Assembly 1 DIY Airbrush Spray Booth Assembly 2DIY Airbrush Spray Booth Assembly 3

     DIY Hobby Spray Booth Assembly Illustration

    DIY Hobby Spray Booth Cutlist Illustration

    Download Cutlist & Assembly Instructions Below

    DIY Hobby Spray Booth Assembly Instructions & Material Cut List





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    DIY Spray Booth

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