GermGuardian CDAP4500BCA WiFi Smart 4-in-1 Quick Review

The Alexa friendly air purifier that you always wanted. GermGuardian CDAP4500BCA WiFi Smart is a typical 4-in-1 True HEPA tower air purifier from GermGuardian with the addition of Wi-Fi mode that supports GT app and Amazon Alexa. At a reasonably inexpensive price tag (after discount), this modern tech air purifier is perfect for allergy sufferers that wants something that can monitor and manage their indoor air quality and a comfortable distance. Is the Wi-Fi enabled feature a necessity or simply a marketing gimmick? Let's find out.
± 249.99 p
     Annual filter ^    
± 72 - 100 p
Online price*
Latest Amazon price

GermGuardian CDAP4500BCA Specification

ProductGermGuardian CDAP4500BCA
6.4 x 22 x 8.9 in
(16.3 x 55.9 x 22.6 cm)
Weight9.5 lb (4.3 kg)
Coverage (up to)124 sq. ft. (12 m2)
Dust free (CADR)100 cfm (170 m3/h)
Pollen free (CADR)100 cfm (170 m3/h)
Smoke free (CADR)100 cfm (170 m3/h)
Airflow speed
- Lifespan
- Replacement cost ($)
Charcoal pre-filter
6 - 9 months
HEPA filter
- Lifespan
- Replacement cost ($)
True HEPA filter
6 - 9 months
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ Technologies
UV-light/ PCO
LB4000 UV-C Light
10 - 12 months+- 24.99
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
FLT4825 Filter-B True HEPA
6 - 9 months
+- 34.99
Optional/ Addon
FLT22CB4 Carbon Filter (4 pack)
+- 14.99
FLT4850PT Filter-B-Pet True HEPA
6 - 9 months+- 39.99
Noise level
Power consumption
Timer/ Scheduler1 - 8 hours (via control panel or app)
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support
Product image

Key features

  • 4-stage filtration with 5 speed and digital display
  • Wi-Fi enabled with remote access via GT (Guardian Technologies) App
  • Voice Control Capable with Gi Gi skill and Alexa
  • True HEPA filter - 99.97% on microorganism as small as 0.3 micron
  • Charcoal Pre-filter
  • UV-C light technology
  • Auto mode/ SmartAQMTM (Air Quality Monitor) - Red = bad, Yellow = moderate, Green = good air quality
  • 1 - 8 hours (via control panel or app)
  • 3 years warranty

GermGuardian CDAP4500BCA review

  • Very attractive price (after discount) for a Wi-Fi enabled air purifier.
  • Able to adjust the air purifier fanspeed, mode or timer at any part of the world.
  • Flexible timer and Auto mode setup where you could set it through the physical button on the machine or via GT app.
  • "Real" True HEPA filter that able captures microscopic airborne particles and allergens.
  • Optional UV-C light does well in killing odor-causing bacteria and germs.
  • Standard GermGuardian 3 years manufacturer warranty.
  • Filter replacement cost could shot up high on heavy use (bad indoor environment).
  • Rather constricted purifying coverage which is only suited for small room size.
  • GT app unexpectedly shut down couple of times although updates would probably fix it.
  • Limited Alexa command while each array commands is overlong e.g. Alexa, ask Gi Gi to set the fan speed of Bedroom to 4.
GermGuardian CDAP4500BCA dimension
6.4 x 22 x 8.9 in
(16.3 x 55.9 x 22.6 cm)
GermGuardian CDAP4500BCA weight
9.5 lb (4.3 kg)

Exciting times ahead for GermGuardian products. GermGuardian CDAP4500BCA WiFi Smart 4-in-1 is the first air purifier in its lineup that featured a Wi-Fi connectivity pairing. Not only you can fully access the air purifier functionality like timer, fanspeed through its GT app, GermGuardian CDAP4500BCA WiFi Smart 4-in-1 is also Voice Control Capable through Gi Gi skill and Amazon Alexa. A simple command like “Alexa, ask Gi Gi to set the fan speed of Bedroom to 2” will automatically set the air purifier fanspeed to 2. Up front the seamless tower shaped design also comes with a SmartAQMTM (Air Quality Monitor) that will light up in Red when air quality is bad, yellow when air quality is so so and green when air quality is good. There is also a control panel with digital display which replicates all the controls available in the app. Rounding up on GermGuardian CDAP4500BCA WiFi Smart 4-in-1 exterior quirks and features, Energy Star and a 3 years manufacture warranty is standard that warrant a pretty solid build quality.

Airflow capability and purifying coverage

Unfortunately GermGuardian CDAP4500BCA WiFi Smart 4-in-1 is one of the weakest Wi-Fi enabled air purifier we tested due to its tower form and price factor. A tremendously efficient air purifier on restricted room size, the airflow distribution rate is actually very consistent regardless of which 5 speed you opt for. In general, GermGuardian CDAP4500BCA WiFi Smart 4-in-1 can be used in living hall but bedroom size would probably suits it best.

Moving on with the purifying capability, GermGuardian CDAP4500BCA WiFi Smart 4-in-1 4-stage filtration depth can covers all ground including odor caused by bacteria. The optional UV-C light works well with the True HEPA filter and Charcoal Pre-filter in trapping up to 99.97% of airborne pollutants and allergens within in its purifying radius.

Noise level and power consumption

GermGuardian CDAP4500BCA WiFi Smart 4-in-1 does not have the greatest airflow delivery rate so naturally noise level is also reflected accordingly. At the first 2 speed you can barely hear any fan noise. Third speed onward noise level gradually increase but still within a bearable level. Shifting to the electricity usage, you will not see any major impact on the electricity bills on standard utilization of GermGuardian CDAP4500BCA WiFi Smart 4-in-1. Electricity consumption is partially low to average depending on what speed the air purifier is kick in. For more energy-efficient management, you can rely on the Auto mode and SmartAQM to work its magic.
noise graph

Final thoughts on GermGuardian CDAP4500BCA WiFi Smart 4-in-1

Rounding up, GermGuardian CDAP4500BCA WiFi Smart 4-in-1 is the exact mirror of other GermGuardian tower air purifier if you remove the Wi-Fi support. Since it share most of the tower air purifier advantages/ disadvantages, we highly recommend consider GermGuardian CDAP4500BCA WiFi Smart 4-in-1 over the others as the convenience remote control brings and SmartAQM with auto mode is highly justifiably for a little money top up.

Covered against
GermGuardian CDAP4500BCA VS Dust



GermGuardian CDAP4500BCA VS Pollen



GermGuardian CDAP4500BCA VS Hair

Hair/ Pet hair


GermGuardian CDAP4500BCA VS Dust mite

Dust mites


GermGuardian CDAP4500BCA VS Mold/ Mildew

Mold/ Mildew


GermGuardian CDAP4500BCA VS Pet dander

Pet dander


GermGuardian CDAP4500BCA VS Virus/ Germ

Virus/ Germ


GermGuardian CDAP4500BCA VS Tobacco smoke

Tobacco smoke


GermGuardian CDAP4500BCA VS Chemical



GermGuardian CDAP4500BCA VS VOCs



GermGuardian CDAP4500BCA VS Smoke/ Gas

Smoke/ Gas


GermGuardian CDAP4500BCA VS Odor



GermGuardian CDAP4500BCA 4-stage filtration and purifying applicable area is terrific when pit against allergens, irritants, viruses and bacteria. It is vastly efficient on large airborne pollutants such as dust, hair, pet hair. On the one hand against tiny pollutants, GermGuardian CDAP4500BCA 5 speed airflow input/ output + is distinctive at capturing pet dander, dust mites, pollen, mold and mildew.  On smokes and odors, GermGuardian CDAP4500BCA filtration is weak in handling chemicals, odors, cooking smell, fire, VOCs, tobacco smokes, cigarette, vapor, radon and ammonia.

Verdicts and ratings

Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

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