5 Steps on How to Choose the Right Size for an Air Purifier

comfortable living room

When it comes to choosing an air purifier, one of the most important factors to consider is the unit’s size. The right-sized unit will be able to effectively clean the air in the room it is placed in, without being too bulky or taking up too much space.

There are many different types of air purifiers on the market, so it’s important to choose the right one for your needs. Here are five steps to help you choose the right size air purifier for your needs:

Step 1: Determine the Size of the Room

The first step is to determine the size of the room you want to purify. The rule of thumb is that you need about 100 square feet of coverage for every 1,000 BTU (British Thermal Units) of heating or cooling capacity. So, for example, if you have a 1,000-square-foot room, you would need a 10,000 BTU air purifier.

Step 2: Choose the Right Type of Air Purifier

There are four main types of air purifiers: HEPA, activated carbon filter, ionized, ozone and UV light.

  • HEPA Air Purifiers: They work by trapping particles in a filter. The filter is made of very fine mesh that catches 99.97% of particles that are 0.3 microns or larger in size. The most common type of HEPA air purifier is a portable unit that you can place in any room of your home.
  • Activated Carbon Filters: They work by adsorbing (attracting and binding to) particles in the air, which are then removed from the air when the filter is cleaned. These filters are often used in combination with other types of air purifiers, such as HEPA filters.
  • Ionized Air Purifiers: They work by charging particles in the air, which are then attracted to a collector plate. These purifiers are often used in combination with other types of air purifiers, such as HEPA filters.
  • UV Light Air Purifiers: They work by exposing particles in the air to ultraviolet light, which kills bacteria and viruses. These purifiers are often used in combination with other types of air purifiers, such as HEPA filters.

The HEPA-free technology is an emerging type of air purifier that does not use HEPA filters. Instead, it uses an electrostatic filter to capture particles. The particles are then trapped on a metal plate, which can be cleaned and reused. This is said to be more effective and does not require replacement filters, making them more environmentally friendly.

Step 3: Consider the Air Purifier’s Cadr Rating.

When shopping for an air purifier, be sure to look for the unit’s CADR rating. CADR stands for clean air delivery rate, and it’s a measure of an air purifier’s ability to remove airborne particles, smoke, and pollen from the air. The higher the CADR rating, the more effective the air purifier will be at cleaning the air.

Step 4: Consider the Air Purifier’s Noise Level

Air purifiers come in a variety of noise levels, so it’s important to choose one that will not be too loud for your needs. If you’re looking for a quiet air purifier, look for units that have a noise level of 30 dB or less.

Step 5: Consider Your Budget

As you shop for the right size of air purifier, it’s important to consider your budget. Air purifiers can range in price from $100 to $1,000 or more, so it’s important to choose one that fits your needs and your budget.


Choosing the right size HEPA-free air purifier for your needs can be a tricky task. However, by following the five steps outlined in this article, you can be sure to find the perfect purifier for your home or office. With a little bit of research, you can find the perfect air purifier to keep your indoor air quality fresh and clean.

If you’re looking for an air purifier for your home, you’ve come to the right place! At Air Purifier For Home, we can help you find the best air-purifying system for your needs. We have a wide range of air purifiers to choose from, so you can be sure to find one that fits your budget and your needs. Let us help you achieve a cleaner, breathable home! Contact us to get started!

Recent Posts

error: Content is protected !!