Holmes HAP-424-U HEP Type Tower Air Purifier

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

People who are concerned about environmental and climate change issues understand how a purifier useful, although 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 Air Purifiers for dust, which cleans the surrounding air in your home so that you can breathe without pollutants and contaminates.

At least you can take breath in fresh air in your home or office.

Holmes HEPA Type Tower Air Purifier, HAP424-UBuy on Amazon

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

People who have pets and who smoke, purifiers will help remove this type of smell and odors. There are many types of air purifiers, some have mechanical filters while others have an electrical charge.

However, air purifier also has 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, pet dander which are larger than 0.3 microns.

Different Categories of Air Purifiers

Odour Eliminator

This purifier is designed to remove odor by using its 10 times odor-fighting power. It contains Carbon, Zeolite, and Arm & Hammer baking soda to remove odor. It is ideal for eliminating odors from tobacco smoke, pets, household garbage, and cooking fumes. You will need to change this filter every 4 months.

Total Air

It uses HEPA technology to remove pollutants as small as 2 microns. It has Arm &Hammer Baking Soda making it ideal for dust reduction as it provides 30% better air quality compared to other filters.

Allergen Remover

It also uses HEPA technology to remove particles such as dust, pollen, mold, and dander almost. They are as small as 3 microns. It is ideal for allergy sufferers. It can be used for up to 12 months.

Performance Plus

It is like an allergen remover but its performance is better than that. It removes allergen and pollutants such as smoke, dander, etc. It uses true HEPA technology for this and lifespan is 12 months.

Carbon Filter

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

Air quality

How to choose air purifiers and what is the quality of air, after considering this all things and buy air purifiers. If your surrounding air doesn’t have good quality, it is hazardous to your health.

You have to check AQI (air quality index), If you want to know the air quality of your surrounding areas, you would refer to the air quality index (AQI).

The air is tested in the particulate matter and also check for the bacterial and viral content. If particulate matter is 2.5 and 10, it includes hazardous gases. The quality is not good for the air.

Uses and application

There are many uses of this particular air purifier, like

-> Purifiers are purchased by many hospitals and medical facilities; they need to continue to work over a long period. If long-term testing were done on the air cleaners, the air purifier’s performances deteriorated rapidly.

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

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

They can increase a person’s heart attack and stroke risk. This purifier gives you a guarantee to remove at least 99.5% of pollutants.

Things to consider

Particular category

You choose your particular filter and purifiers by your choice. If you want odor remover then just choose this. If you want allergen remover, then go for total air and performance enhancer.


First check the lifespan, for an air purifier. Whether it has a long life or short life.

Dirt sensor

It has the unit automatically adjusts fan speed and remove dust and dirt from the surrounding air.

Washable Pre-filter

A washable and reusable filter is most important. It collects large particles and it can help to cut overall costs.

Speed controlling

It has a speed controlling feature, having a knob to control the speed. This HEPA air purifier has a 3-way speed controller.

Remote control

You can operate it by remote control easily. This handy feature allows you to adjust settings from across the room.


If your purifier has an ionizer, it is important to check it doesn’t produce Ozone. It is a possible lung irritant.

Pros & cons


  • Good for filtering pollutants such as dust and smoke.
  • It has the lowest cost HEPA filter.
  • Worth for your money, getting fresh air.
  • Movable and portable, you can change your location according to your need.
  • It has a Permanent pre-filter.
  • It uses 4 stages of filtration process which is beneficial for the user.
  • 3 fan speed setting- whatever speed you want you can change according to that.
  • It has an optional ionizer, which can be disabled.
  • It has upgradable to aer1 filter.
  • Very small and complete solution for clean air
  • Protects furnishing, reduced maintenance, and cleans housekeeping.


  • Sometimes it started to make noise
  • Sometimes an allergy is not cured by this.
  • It is used for a small room; it has a small applicable area with poor CADR.
  • No add-on features like a timer.

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