Holmes HAP-424-U HEP Type Tower Air Purifier

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Holmes Hepa-Type Tower Air Purifier with 3-Speeds and Quiet Operation, HAP424-U

Those concerned about environmental and climate change issues understand how a purifier useful, though it starts at a minuscule level.

Something you do mindlessly—breathing—can culminate into something much bigger and fatal.

The best choice is to use HEPA Air Purifiers for dust, which cleans the surrounding air in your home so that you can breathe without pollutants and contaminates.

At the very least, you can breathe  fresh air in your home or office.

If you suffer from allergies, asthma, and any other medical condition that’s made worse by dust and airborne particles, a room purifier can provide you with some relief.

For those who have pets and who smoke, purifiers will help remove these types of odors. There are many types of air purifiers; some have mechanical filters while others have an electrical charge.

However, air purifiers also have some limitations, and users have to understand and adjust their expectations accordingly.

Portable air cleaners are effective in removing airborne pollutants, but they are not good for dust mites and their droppings. Unlike other air cleaners, these devices don’t remove chemical gases or strong odors. Most air purifiers are used to remove pollen, dust, plant spores,  and pet dander—which are larger than 0.3 microns in size. The tower air purifier looks amazing with a powerful HEPA air ionizer feature.

Different Categories of Air Purifiers

Odor Eliminator

This purifier is designed to remove odor with  a combination of carbon, zeolite, and Arm & Hammer baking soda. It is ideal for eliminating odors ranging from tobacco smoke, pets, household garbage, to cooking fumes. You will need to change the HEPA Type filter every 4 months. It removes 99% of airborne particles—some as small as 2 microns in size like smoke or dust—with the powerful HEPA filter. HEPA works similar to the Holmes aer1.

Total Air

This one uses HEPA technology to remove pollutants as small as 2 microns in size. It has Arm & Hammer Baking Soda, making it ideal for dust reduction as it provides 30% better air quality compared to other filters. The Holmes HEPA Type tower air purifier is also a great choice, boasting an average customer review of 5 out of 5 stars. It’s the perfect air purifier with UV for everyday use, and as a plus, it looks stylish.

Allergen Remover

This one also uses HEPA technology to remove particles such as dust, pollen, mold, and dander as small as 3 microns in size,which is ideal for allergy sufferers. It can be used for up to 12 months. The air purifier with HEPA removes 99% of airborne particles, capturing particles as small 2 microns in size from the air such as pollen, dust, mold, smoke, spores, and pet dander. The product quality of HEPA boasts an average 4- out of 5-star rating.

Performance Plus

It is similar to an allergen remover, but its performance is better than that. It removes allergens and pollutants such as smoke, dander, and so on. It uses True HEPA technology for this and its lifespan is 12 months.

Carbon Filter

This is one type of booster which uses Arm & Hammer baking soda and absorbs odors. It enhances the air filter to help eliminate odors. You can use it for 60-90 days depending on frequency of use.

Air quality

If your surrounding air is of poor quality, it is hazardous to your health! The mini tower air purifier ensures an efficient clean air delivery rate. The air passing from its filter and air ionizer is cleaner compared to most. The air purifier with HEPA Type has an average rating of 4 out of 5 stars.

You have to check AQI (air quality index)  to measure the air quality of your area.To do this, you can refer to AirNow.gov if you live in the United States.

The air is tested for particles and checked for bacterial and viral content. If particle matter measure 2.5 to 10, it’s considered hazardous.

Uses and application

There are many uses of this particular air purifier, such as:

-> Purifiers are used in many hospitals and medical facilities; they need to continue to work over a long period. If long-term testing were not done on them, the air purifiers’ performance would deteriorate rapidly.

It features a low, initial, and high flow. It works great initially, though after a few weeks it loses 50% capacity. This HEPA Holmes Air purifier has a high-grade filtration process and it never loses capacity.

-> Most of the particles are smaller than 0.1 microns in size and should be tested by air quality check. These airborne particles are ultra-fine in size; they can be harmful to a person’s health.

They may increase a person’s risk for heart attack and stroke. This purifier guarantees to remove at least 99.5% of pollutants.

Things to consider

Particular category

You can choose a particular HEPA filter and purifier for your needs. If you want odor remover, there is a product for that. If you want an allergen remover, then go for total air and performance enhancer True HEPA air purifier. The smoke HEPA Type filter also removes up to 99 microns’ worth of particles from the air. The HEPA Type tower air is the most preferred by those concerned about product quality. It is best for living spaces and rooms up to 180 square feet in size.


First check the lifespan for a HEPA air purifier: whether it has a long life or short life.

Dirt sensor

The purifier with HEPA filters automatically adjusts its fan speed and removes dust and dirt from the surrounding air. It removes up to 99% of dust mold, smoke, pollen, and pet dander to make for cleaner air.

Washable Pre-filter

A washable and reusable filter is of utmost importance. It collects large particles and can help cut overall costs. The product quality is tough to beat with average ratings  of 4 out of 5 stars.

Speed control

It features speed settings, which can be adjusted by a simple knob. This HEPA air purifier has 3-way speed control.

Remote control

You can operate it by remote! This handy feature allows you to adjust your settings from across the room. The Holmes air purifier comes with filter reminder dial, which indicates when its filter needs to be changed and has excellent customer reviews.


If your purifier has an ionizer, it is important to check that it doesn’t produce ozone, which might irritate your lungs.

Pros & cons


  • Good for filtering pollutants such as pollen, dust, mold, and smoke.
  • It is the most affordable purifier with HEPA filters.
  • Getting fresh air into your home is a worthy investment.
  • Movable and portable; you can change its location according to your needs.
  • It has a permanent pre-filter and powerful carbon filter.
  • It uses 4 stages of filtration processes for thorough air cleansing.
  • Adjustable 3-fan speed setting.
  • It has an optional ionizer.
  • It can be upgraded to a Holmes aer1 filter.
  • It’s a small and discrete solution for family rooms.
  • Protects furnishing, reduces maintenance, and cleans the house’s air.
  • Space-saving tower.


  • Can be noisy on certain settings.
  • Does not prevent all allergic reactions.
  • It is designed for a small room; it has poor CADR for large rooms.
  • There are no add-on features, such as a timer.

Top Holmes Air Purifiers List

Frequently Asked Questions:

1. Is Holmes air purifier good?

Yes, Holmes HEPA Type tower air purifier is the best choice. It comes with a HEPA filter and is an ideal choice to remove airborne particles, pet dander, and smoke. The replacement filter for this HEPA air purifier is affordable and has an excellent clean air delivery rate.

2. Which is a better: an air purifier or ionizer?

The True HEPA air purifier is better compared to the air ionizer due to the high-quality air filter. The cleaning cycle is quick and removes up to 99% of air pollutants. It is also one of the best tower air purifiers that captures particles as small as 2 microns in size, depending on the HEPA filter type.

3. How do you reset a Holmes HEPA filter?

For the Holmes HEPA air filter, you can opt for a replacement filter and an ionizer to make air cleaner.

One thought on “Holmes HAP-424-U HEP Type Tower Air Purifier

  • January 22, 2022 at 10:43 pm

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