Honeywell AirGenius 3 HFD300 review In 2022: Get The New One!

Honeywell AirGenius 3 HFD300 is 1 of the 3 filterless air purifier. It's considered the "entry level" model although that doesn’t say a lot considering how good AirGenius is. Integrated with the same technologies and the QuietClean ifD in its core filtration. How well can the air purifier perform when competing against its own Honeywell AirGenius 4 and 5? Will this touted weaker air purifier worth the saving?
online price (US)**
±179.99 $$$/ 7

(annual filter cost ±0)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Honeywell AirGenius 3 HFD300 Specification

ProductHoneywell AirGenius 3 HFD300
11.5 x 29 x 11.5 in
(29.2 x 73.7 x 29.2 cm)
Weight13.5 lb (6.1 kg)
Coverage (up to)225 sq. ft. (21 m2)
Airflow speed
Dust free (CADR)150 cfm (255 m3/h)
Pollen free (CADR)160 cfm (272 m3/h)
Smoke free (CADR)146 cfm (248 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
Washable Pre-filter
HEPA filter
- Lifespan
- Replacement cost ($)
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ TechnologiesOscillation
UV-light/ PCO
Other filter
ifD Micro-Filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
HRF-K2 Filter K Household Odor & Gas Reducing Pre-filter (2 pack)
3 months+- 15.95
Noise level
Power usage level
Timer/ Scheduler
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty5 years
Email/ Phone support

Key Features

  • 3-stage filtration
  • 2 pre-filter options - Washable foam pre-filter or odor & gas reducing pre-filter
  • Permanent QuietClean ifD filter
  • Optional Oscillation mode
  • 3 speed controls with filter check button
  • 5 years limited warranty

Design And Usability

Honeywell AirGenius 3 HFD300 dimension
11.5 x 29 x 11.5 in
(29.2 x 73.7 x 29.2 cm)
Honeywell AirGenius 3 HFD300 weight
13.5 lb (6.1 kg)

The older and so-called “entry-level” to AirGenius series. Honeywell AirGenius 3 HFD300 shares many design elements and specification from the group. At 11.5 x 29 x 11.5 in dimension and 13.5 lb weight, the air purifier is neither compact or bulky. Going through the slim profile body, you will find a large honeycomb air inlet at the back and air outlet at front. The flask wide bottom design retained for better stability. Overall, fitting is tight but the lack of a bottom accent light is one of the few things you have to compromise.

Let’s begin the controls from left to right. The Check Filters Button allows you to check filter status on single click. If you see the filter status in red color, press and hold the button for 3 seconds to reset the timer. Next, the Purification level button will cycle between Sleep (night use), General (everyday use), and Max (highest fan speed). The power button will turn on or off the air purifier (duh). To the right, Oscillate will activate side to side purifying for better circulation. If you have seen AirGenius 4 or 5 previously, you will notice HFD300 controls is a little bit empty. that is because there is no Light Dimmer button, Timer button and speed are limited to 3 options.

Lets recap on the specification. You have a 3-stage permanent filtration with 3 cleaning setting. Timer, Oscillation, and check filters/ Reset Button. Finally, AHAM and ARB certified, Energy Star rated and 5 years warranty.

Airflow, Coverage, And CADR

Honeywell AirGenius 3 HFD300 coverage
Purifying coverage
225 sq. ft. (21 m2)
Honeywell AirGenius 3 HFD300 fanspeed
As an entry-level to the series, the airflow delivery rate is actually OK for a permanent air purifier. Limit to 3 speed, you can set the speed to either Sleep, General Clean or Max. We recommend leaving it to General Clean on everyday use. On the other hand, 225 sq. ft. coverage is average thus AirGenius 3 probably best suited for small to medium room size. Again, no autonomous purifying as mentioned earlier.
Honeywell AirGenius 3 HFD300 dust CADR
150 cfm (255 m3/h)
Honeywell AirGenius 3 HFD300 pollen CADR
Pollen CADR
160 cfm (272 m3/h)
Honeywell AirGenius 3 HFD300 smoke CADR
Smoke CADR
146 cfm (248 m3/h)
Honeywell AirGenius 3 CADR return is no doubt the weakest in its series. Starting with the 150 cfm for dust, 160 cfm for pollen and 146 cfm for smoke. Despite dust CADR being the lowest, the air purifier fares quite well on large particles. Smoke CADR is the poorest but for home use is A-OK.

Filters And Performance

AirGenius 3 QuietClean ifD technology is what this air purifier is all about. With no filter replacement needed, the pre-filter could easily trap large particles like dust. Next, the patented ifD filter would handle microscopic allergens as small as 0.3 microns. For smoke and chemicals, you have the option to switch to the odor-reducing pre-filter. Do note the filter is non-washable and requires quarterly replacing. There is also an Ionizer at the end that will release ions to merge with airborne particles. This caused the particles to fall from increased weight and the ifD filter will take over from there. As with all permanent filter, regular maintenance is needed (vacuuming only). This would prevent the filter from being congested by contaminants.

Noise And Energy Usage

HFD300 noise level is very similar to other AirGeniuses despite the weaker airflow. As usual, noise is virtually silent at speed 1 (sleep mode) and audible but not too intrusive at speed 3 (Max). Same goes with power usage, it's at low to a reasonable rate depending on the cleaning mode. Technically, it should use less than a lightbulb but we have not tested it on that.
Noise TypeDecibels
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Honeywell AirGenius 3 HFD300 MRSP/ RSP
+- 179.99
Honeywell AirGenius 3 HFD300 annual filter replacement cost
Annual Filter Cost
+- 0
^ Replacement filters/ estimated cost
Honeywell AirGenius 3 is the cheapest in its series although not by a whole lot. At this price, there are a lot more HEPA air purifiers available that uses a mechanical filter. If you prefer to pay only at one go, HFD300 is THE ONE thanks to the zero annual filter maintenance. Given all that, we would still recommend opting for the higher spec Honeywell AirGenius 4 or 5 model. Both still availability and offers better performance VS value return.
If you insist on getting Honeywell AirGenius 3, you're out of luck. Last we checked, most store from Amazon, Walmart, BestBuy, or even Honeywell does not carry it anymore. Instead, go with AirGenius 5 that is a much better version of 3. It is still available in Amazon with sales price, comes in 2 colors, and at a very minimal top up.

Honeywell AirGenius 3 HFD300 VS The Challengers

Honeywell AirGenius 4 HFD310 Review

Honeywell AirGenius 4 HFD310

Around the same price (after discount) for better airflow and slightly wider purifying. You also gain 1 additional cleaning mode, light dimmer, and 3 preset timers. Availability wise is better but we will recommend going straight for the top model.
Honeywell AirGenius 5 HFD320 Air Purifier review

Honeywell AirGenius 5 HFD320

This is the model you should go for. It is widely available, has the best-in-class CADR, and widest purifying coverage. There is also light dimmer, 5 cleaning mode, and 6 preset timer airflow distribution. The best thing is the price is not too far off from HFD300!
Hamilton Beach TrueAir Compact Pet Air Purifier 04384 Review

Hamilton Beach 04384 TrueAir Compact Pet

If you want something way cheaper yet comes with a permanent HEPA filter (HEPA-type that is). It can be purchased at most retail outlets, comes bundled with carbon sheet. Just don't mind the inferior airflow range and performance.

Final Thoughts On Honeywell AirGenius 3 HFD300

Honeywell AirGenius 3 is a niche air purifier that most buyers know exactly what are they paying for. 65% of the buyer that gave it 4-5 stars like what they received. This includes the permanent ifD that is effective against microscopic particles particularly pet dander. Praises also coming from the air purifier design and no recurring filter fees. A high 27% of the 1-2 star reviewers are dissatisfied with the durability. Common signs include burned circuit board, or funny noises within a couple of months. We notice the reliability issue is common throughout the 3, 4 and 5 series. If you are still interested in it, give Kaz the manufacturer a call to check if the issue has been resolved.


  • Sleek honeycomb style tower design.
  • Works either with permanent pre-filter or Odor-reducing pre-filter (optional upgrade).
  • Zero annual maintenance cost.
  • Effective QuietClean ifD filter that is proven against microscopic household allergens.
  • 5 years limited warranty.


  • Price is close to AirGenius 4 and 5 with less speed, no timer, and no live filter change gauge indicator.
  • Weaker overall airflow performance.
  • Incomparable with traditional filter HEPA media filtration efficiency.
  • Permanent filters require vacuuming to free up space from the dust particles.
Honeywell AirGenius 3 HFD300 Air Purifier Review

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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