When building a grow box, you must first clear the area where you will grow your plants. You should remove any clutter, such as old furniture. If you cannot get rid of those items easily, you can also organize a yard sale. Cleaning the space thoroughly is also an important step before starting construction. In the next part, we’ll cover the steps to install a ventilation fan, install insulation, and add a carbon filter.

Installing a fan

Before installing a fan when building a grow box, make sure you know the amount of space you have. A twelve-foot-square room requires five hundred and ninety cubic feet of airflow. If you plan to grow your plants in a tent, you can mount the fan on the wall of the tent and place a carbon filter outside. While this is not ideal, it is still acceptable for smaller grow boxes.


Good ventilation is essential to keep your indoor growing environment at the right temperature. It allows for the proper flow of air, helps to eliminate excess moisture in the air, and keeps your plants healthy. Without proper ventilation, your plants will continually release water vapor from their leaves, which is not good for their health. Furthermore, stagnant air can attract many pests, and can cause your plants to wilt or die.


The walls of your grow box need insulation to prevent heat transfer. The insulation must be fire retardant and vapour barrier-approved. Dry wall is one common choice. Its polyethylene covering prevents moisture damage. For an upgrade, plywood sheathing is an excellent option. It can be painted flat white with a low-volatility oil-based primer, and has superior sound deadening properties. Foil can also be used on exterior walls, albeit at a higher price.

Adding a carbon filter

Adding a carbon filter to a build box improves air quality inside the grow room. The carbon filter traps pollutants, reduces odors, and improves the overall atmosphere. These filters should be installed into a grow room with a strong ventilation system. You will need to change the filter frequently, depending on the size of your grow box and the amount of plants you are growing. Carbon filters are made of a natural material called activated carbon.

Making a smell-proof grow box

A smell-proof grow box is a great way to protect your flowering plants from odors. You can use absorbing gels to trap bad smells, but plastic bins are more sturdy and tend to be easier to clean. The most important thing to remember when making a smell-proof grow box is to regulate humidity and temperature. Your flowering plants will suffer from bad odors if the temperatures are too high or too low.

Using an old corner lamp as a heat source

Using an old corner light as a heat source is an easy way to create an effective grow room that will maximize the amount of heat your plants receive. A corner light is a great source of heat, but it may not be the ideal solution for areas that don’t reach a high enough temperature. You can crumble the old lamp and use its unused light as a heat source. You can even use it to heat a brooder or other area in your grow room.

Cleaning a grow box

Regularly cleaning a grow room will ensure that your growing area remains as sterile as possible. The soil and organic matter present in the grow room may contain bacteria, insects, and fungal spores. A Shop-Vac with filters will catch these organisms and prevent them from reentering the grow room. Alternatively, you can take a deep clean by hand. A thorough clean should be enough if you have recently purchased a new tent.

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