Holmes Air Purifier HAP9424BF-TUA/ HAP9424B-NU Quick Review

Forget the previous preview as Holmes HAP9424BF-TUA/ HAP9424B-NU is yet another variant tower air cleaner that has a typical airflow delivery performance compare with its peer. Enhanced with an ionizer and odor eliminator ARM & HAMMER Baking Soda, let us look into the features of Holmes HAP9424BF-TUA/ HAP9424B-NU, filters, purifying capacity and finally the pros and cons in details.
+- 79.99
     Annual filter ^    
+- 18 - 54
Online price*
    Latest Amazon price    
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Holmes HAP9424BF-TUA Specification

ProductHolmes HAP9424BF-TUA
RSPRetail suggested cost +- 79.99
8.7 x 27.6 x 9.8 in
(22.1 x 70.1 x 24.9 cm)
Weight6 lb (2.7 kg)
Coverage (up to)195 sq. ft. (18 m2)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)126 cfm (214 m3/h)
Airflow speed
A filterAnnual filter cost ($)+- 18 - 54
- Lifespan
- Replacement cost ($)
HEPA filter
- Lifespan
- Replacement cost ($)
aer1 HAPF30AT HEPA-Type Total Air Filter
4 - 12 months
+- 17.99
Carbon filter
- Lifespan
- Replacement cost ($)
ARM & HAMMER Odor Grabber Filter
2 - 3 months
+- 6.99
Ionizer/ TechnologiesIonizer
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
aer1 HAPF30AT HEPA-Type Total Air Filter
4 -12 months+- 17.99
aer1 HAPF300AH True HEPA Allergen Remover Filter
12 months+- 19.99
aer1 HAPF30AO Odor-Eliminator Filter
4 - 12 months+- 12.99
aer1 HAPF300AP True HEPA Allergen Performance-Plus Filter
4 - 12 months+- 19.99
aer1 HAPF30AS Smoke Grabber Filter
4 - 12 months+- 19.99
Arm and Hammer Air Purifier Booster Filter
12 - 18 months
Noise level
Power consumption
Timer/ Scheduler
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Product images

Holmes HAP9424BF-TUA key features

  • 3-stage filtration
  • HEPA-type filter
  • Support optional Aer1 filters
  • 3 fan speeds - Manual dial knob
  • ARM & HAMMER baking soda filter - Remove bad odors and gases
  • Optional ionizer
  • Three-years limited warranty
Holmes HAP9424BF-TUA dimension
8.7 x 27.6 x 9.8 in
(22.1 x 70.1 x 24.9 cm)
Holmes HAP9424BF-TUA weight
6 lb (2.7 kg)
Holmes HAP9424BF-TUA/ HAP9424B-NU is solidly made for a HEPA tower air purifier although you could tell the black plastic design doesn’t age well and is consider tall for its segment. Nevertheless its light weight framework makes up for the hassle-free portability. Manual dial knob, filter change indicator and air inlet are all located at the front of Holmes HAP9424BF-TUA/ HAP9424B-NU. Cover is removable for filter change although its slightly tedious due to the shape of the air purifier.

Applicable area and CADR

The recommended coverage for Holmes HAP9424BF-TUA/ HAP9424B-NU is at 19 m2 or 209 sq. ft. Not great but does the job as a bedside or desk purifier. Unfortunately due to the limited time we have with the air purifier, we did not go through the CADR test and the only official CADR we have its 126 cfm for smoke. Let us know in the comment if you guys have more info.

Final thoughts on Holmes HAP9424BF-TUA/ HAP9424B-NU

No surprise here, pricing would be Holmes air purifier HAP9424BF-TUA biggest attraction (discontinued FYI) among all of its features and rightly so. While some of its features are neat, the use of HEPA-type filter is not. In reality Holmes HAP9424BF-TUA is only offering mediocre performance compared with some of the top dog.

Holmes HAP9424BF-TUA is covered against

Holmes HAP9424BF-TUA VS Dust



Holmes HAP9424BF-TUA VS Pollen



Holmes HAP9424BF-TUA VS Hair

Hair/ Pet hair


Holmes HAP9424BF-TUA VS Dust mites

Dust mites


Holmes HAP9424BF-TUA VS Mold/ Mildew

Mold/ Mildew


Holmes HAP9424BF-TUA VS Pet dander

Pet dander


Holmes HAP9424BF-TUA VS Virus/ Germ

Virus/ Germ


Overall Holmes HAP9424BF-TUA effective Pre-filter plus 195 sq. ft. purifying coverage and airflow is excellent in trapping large airborne contaminants e.g. dust. pit against allergens, bacteria, Holmes HAP9424BF-TUA bundled aer1 HAPF30AT HEPA-Type Total Air Filter, 3 fanspeed and 4-stage filtration is at average tier in removing pollen, mold, mildew, fungi and spores. 

In conclusion......

  • Very attractive entry price.
  • Slim tower profile.
  • Multi-stage filtration including optional ionizer.
  • Up-gradable filter pack with Holmes Aer1 filters selection.
  • 3 years warranty.
  • Inadequate airflow coverage and performance.
  • Use HEPA type filter that can only eliminates up to 99% of allergens including mold, pollen and pet dander.
  • Discontinued model with outdated design and functionality.
Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

Frequently Asked Questions (FAQ)FAQ

Holmes HAP9424BF-TUA Troubleshooting

Safety Tips


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