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Generator Quiet Box: 4 Recommended Quiet Boxes for Generator

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A generator quiet box will significantly sound deaden the noise produced by your portable generator.

However, making a portable generator quiet box isn’t as easy as it sounds.

This is because the generator continually generates heat, and if proper ventilation isn’t taken into consideration, you’d be faced with overheating.

Such a box will make your generator as quiet as a cricket without breaking the bank and taking much of your time.

Let’s get started:

The Requirements of a Generator Quiet Box

Whenever you venture into this DIY activity, there are requirements that your soundproof generator box must meet.

They include:

  • The DIY generator quiet box must cut the noise problem by at least half. At least 50% noise reduction.
  • It should be easy to assemble and disassemble- hence allowing for storage when not in use.
  • The box should be airtight and also have an air inlet and outlet to prevent generator overheating.
  • It should be safe enough and operate without exposing anyone to the risk of carbon monoxide poisoning.

A-List of Portable Generator Quiet Box

When it comes to generator sound reduction, there are two ways to approach this problem.

You can either design a soundproof generator box yourself or purchase a premade quiet box.

In this guide, we shall be looking at different generator quiet boxes you can get on the market today and a simple guide on making one DIY.

1. The Zombie Box

If you’re not into DIY and would like something that’s already tried and tested, then I would highly recommend the ZombieBox.

generator quiet box

It’s a portable, waterproof, soundproof enclosure for both standby and portable generators.

Luckily, this box is also designed for industrial equipment, air compressors, blowers, electronics blowers, pumps, shop vacuum cleaners, and medical equipment.

According to the manufacturer, this product reduces up to 50%-70% noise, improving your overall safety and comfort.

Its universal design allows it to accommodate a wide range of equipment without affecting airflow and cooling.

If you have a noisy air conditioner, producing buzzing or making pulsating noises, rest assured that the zombie box will deal with the problem effectively.

I hired some guy to install one for my wall air conditioner, and I’m glad that my wall A/C is quieter than before.

The Zombie box is perfect for contractors, festivals, food trucks, cabins, and more.

It’s highly portable and easy to assemble and requires no tools for assembly.

You don’t require any sort of permit in all states- as its city, OSHA, and county noise ordinance compliant.

It is built to withstand permanent outdoor weather sheltering your generator from snow, rain, people, dirt, and debris.

2. Microfab Generator Enclosure

Another great recommendation for a quiet box for generator is the Microfab Generator Enclosure designed by Microfab Company LLC.

This portable generator enclosure will allow you to enjoy quiet living when your backup generator is powered on.

The product measures 43″W x 33″D x 30″H, and it’s large enough to accommodate most portable generators.

Additionally, the surface is boasts powered coated aluminum that helps reduce corrosion.

Aluminum is a lightweight material, and this also contributes to the portability of the enclosure.

generator quiet box

The enclosure includes 4 mounting holes at the bottom that helps secure the cover into paver blocks or cement.

The hinge front door makes it easy to refuel the generator once it runs out of fuel.

The side air windows help keep ventilation, preventing overheating.

Microfab LLC also manufacturers soundproof dog crates made from aluminum materials.

3. Plastic Outdoor Storage Shed by Outdoor Home Design

This product measures 51 x 29 x 43.5 inches and is available in beige and taupe colors.

It weighs only 0.69 kilograms, is waterproof but not as highly soundproof as the zombie box and Microfab enclosures above.

This is perfect storage for a generator as well as other types of outdoor products.

The inside walls aren’t fitted with soundproofing materials, which makes it relatively weak when it comes to acoustic insulation.

It’s a versatile storage option designed to remain outside throughout the year. 

This makes it a perfect option for storing generators and other home tools.

How to Build A Generator Quiet Box?

You can build a quiet generator box in simple steps at home today. Below is a simple guide that you can follow to accomplish this simple DIY project.

The first step would be to take the measurements of your generator or any other tool that you need to soundproof.

When taking the measurements, ensure that you leave some extra inches on each side.

The second step would be to cut the sides and top of the quiet box.

In this case, you can use a medium-density fiberboard material and cut it according to the size of the measurements obtained above.

The third step involves adding ventilation to the MDF you cut above.

Assemble the box using nails or screws.

I would recommend screw as they’ll allow you to disassemble the unit once not in use.

You can add a layer of soundproofing material to the inside of the box.

I would recommend automotive sound-deadening materials such as Kilmat or Dynamat to offer thermal insulation besides noise reduction.

However, you can still use something like mass-loaded vinyl.

When installing the vents, install vent ducts with lots of bends. The bends will act as a sound baffle hence preventing airborne sound transmission through the ventilation system. (Source)

Final thoughts on Generator Quiet Box

Above is a detailed guide on some of my recommended quiet boxes for generators.

I’ve also highlighted a simple guide that will help you construct a quiet box for a generator using readily available and affordable materials on the market today.

The best and most effective method I would always recommend in my case would be the Zombie Box.

It’s a tried, and tested for noise reduction.

It might be an expensive investment, but one that’s worth every penny.

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Gary E Greenwood

Friday 24th of September 2021

Can a propane fueled generator be used in a zombie box?

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