Research has shown over recent years that indoor air pollution can be just as harmful, if not more so, than outdoor pollution. One common indoor pollutant is smoke, emanating from sources like cigarettes, fireplaces, or wildfires. It’s crucial for our health’s sake that we eliminate this type of pollution. We can do this with DIY air purifiers for smoke, which are effective, cost-efficient, and easy to construct. This guide will dissect what they are, why we need them, and most importantly, how to build them yourself.
Being aware of the dangers smoke presents indoors can tremendously improve your quality of life. Smoke from any source is laden with fine particular matter—commonly known as PM2.5—particles that are approximately 2.5 micrometers in size or smaller. These particles can easily bypass our respiratory system’s natural defenses, penetrating deep into our lungs and causing numerous health issues, from respiratory conditions like bronchitis and asthma, to heart disease, and even lung cancer.
DIY air purifiers are an affordable, efficient solution to this problem. Commercial air purifiers can cost hundreds or even thousands of dollars. But a DIY version can be made for as low as $30, achieving similar, if not better, purification results. These DIY air purifiers work by taking advantage of an often-overlooked feature of general-purpose fans—static pressure. Fans generate air flow by creating a pressure difference, causing air to flow from high pressure to low pressure. By attaching a filter to the fan, air is forced through the filter before it’s dispersed into the room, effectively trapping PM2.5 particles.
A practical and easy-to-make DIY purifier primarily needs a fan, a filter, and a strap to hold the filter onto the fan. Here’s a step-by-step guide:
Materials Needed:
- A standard square box fan. This is your air purifier’s main body.
- A PM2.5 filter. Make sure the size perfectly matches your fan.
- A tape, zip ties, or an elastic strap to secure the filter to the fan.
Step 1: Acquiring the Right Fan
The fan is essentially ‘the engine’ of your air purifier. While a round fan can work, a square or rectangular box fan works best because it matches the shape of most filters. It’s recommended to purchase a fan with a high cubic feet per minute (CFM) since a higher air transfer rate makes the air purifier more efficient.
Step 2: Choosing the Right Filter
It is important to choose a filter specifically designed to catch PM2.5 particles. The best filter to choose would be a High-Efficiency Particulate Air (HEPA) filter, designed to capture 99.97% of all particles that are 0.3 micrometers or larger.
Step 3: Attaching the Filter to the Fan
Place the filter directly onto the fan’s intake side (where the cage is). You must ensure that the entire area is covered, leaving no room for unfiltered air to go through. Using a tape, zip ties, or an elastic strap, tightly secure the HEPA filter to the fan.
With these steps finished, you’ve successfully made a homemade air purifier to clear smoke in your home. It’s crucial to remember to change your filters at appropriate intervals (every three months at minimum) because the buildup of pollutants can reduce the air purifier’s efficacy.
It’s worth noting that, while DIY air purifiers are an affordable and effective method of reducing indoor smoke, they aren’t a complete solution. They cannot remove gaseous pollutants such as carbon monoxide or radon. Also, smoke often carries a smell that HEPA filters aren’t capable of eliminating. For these issues, consider integrating activated carbon filters to absorb gasses and unpleasant odors. You should also ensure that the source of smoke is eliminated.
In home situations where wildfires are a concern, more specialized, commercial-grade air purifiers may be necessary to protect the household, as these filters can more effectively remove the broad range of pollutants present in wildfire smoke.
A DIY air purifier serves as a practical solution to the problem of indoor smoke pollution. Striking a balance of cost-efficiency and effectiveness, these homemade devices can significantly improve indoor air quality. Remember to run your DIY air purifier continuously for maximum effect and to maintain it by regularly changing out the filters. It’s a small step but an important one in creating a healthier living environment.
