Main trade-off
Honeywell HPA300
There is no particle sensor, Auto mode, app or scheduling beyond a simple timer.
Head-to-head
Honeywell HPA300 vs Honeywell HPA5300B: 5300B reacts to VOCs, HPA300 needs manual fan selection
The short answer
Choose the HPA5300B for automatic response to its VOC sensor and a slightly smaller cabinet. The HPA300 is simpler for manual fan control.
Before you choose
The reasoning and the trade-offs
Compare room size at the same turnover
At five air changes per hour and an eight-foot ceiling, Honeywell HPA300 calculates to about 450 square feet and Honeywell HPA5300B to 485.
What this is based on
Area = CADR × 60 / (ceiling feet × air changes per hour). Inputs are 300 and 323 CFM, 8 feet and 5 changes. Smoke CADR is used at maximum speed. Air mixing, furniture, open doors and filter loading affect real conditions.
Main trade-off
Honeywell Insight HPA5300B
Its automatic mode responds to a VOC sensor rather than a PM2.5 particle sensor.
Honeywell HPA300
- Choose it for
- You prefer setting the fan yourself
- A familiar local-control layout is enough
- Main trade-off
- There is no particle sensor, Auto mode, app or scheduling beyond a simple timer.
Honeywell Insight HPA5300B
- Choose it for
- You want the sensor to manage fan speed
- A shallower cabinet helps your room
- Main trade-off
- Its automatic mode responds to a VOC sensor rather than a PM2.5 particle sensor.
About this comparison
Choose the HPA5300B for automatic response to its VOC sensor and a slightly smaller cabinet. The HPA300 is simpler for manual fan control.
The sizing upgrade is fairly small
Winner by situation
Start with what you need it to do
The room is large enough to need extra airflow
At the same five-change target and eight-foot ceiling, the calculated limits are 450 square feet for Honeywell HPA300 and 485 for Honeywell HPA5300B. Allow margin if you want to run below maximum speed.
- Honeywell HPA300
- Depends
- Honeywell Insight HPA5300B
- Better fit
The cabinet has to fit beside furniture
Allow 20.1 inches of width and 10.8 inches of depth for Honeywell HPA300, or 19.1 by 10.08 for Honeywell HPA5300B. Intake clearance is extra, so measure the gap in both directions.
- Honeywell HPA300
- Depends
- Honeywell Insight HPA5300B
- Depends
I want control from another room
Neither Honeywell HPA300 nor Honeywell HPA5300B has app control. Choose a connected alternative if remote schedules are essential.
- Honeywell HPA300
- Not suitable
- Honeywell Insight HPA5300B
- Not suitable
The ceiling is ten feet high
At ten feet and five air changes, the modeled room areas fall to 360 square feet for Honeywell HPA300 and 388 for Honeywell HPA5300B. That is 20% less floor area than the eight-foot example because the purifier has more air to move.
- Honeywell HPA300
- Depends
- Honeywell Insight HPA5300B
- Depends
What matters in practice
The differences that matter
Compare room size at the same turnover
At five air changes per hour and an eight-foot ceiling, Honeywell HPA300 calculates to about 450 square feet and Honeywell HPA5300B to 485.
How we reached this conclusion
Area = CADR × 60 / (ceiling feet × air changes per hour). Inputs are 300 and 323 CFM, 8 feet and 5 changes. Smoke CADR is used at maximum speed. Air mixing, furniture, open doors and filter loading affect real conditions.
Measure the cabinet before buying
Honeywell HPA300 occupies a 217.1-square-inch cabinet envelope versus 192.5 for Honeywell HPA5300B. A shallower shape can still need more wall width.
How we reached this conclusion
Width × depth: 20.1 × 10.8 = 217.1 in² and 19.1 × 10.08 = 192.5 in². These are cabinet bounding rectangles, excluding required air clearance.
A modest gain that also reduces floor area
The HPA5300B has about 8% more smoke CADR and about 11% less cabinet footprint than the HPA300.
How we reached this conclusion
(323 / 300 - 1) × 100 = 7.7%. 1 - (19.1 × 10.08) / (20.1 × 10.8) = 11.3% footprint reduction. Intake clearance is additional.
Try your real numbers
Will either purifier move enough clean air?
The result checks hard limits only. Preferences stay out of the calculation.
Honeywell HPA300
Fits these inputs300 CFM of verified clean-air delivery gives about 7.5 air changes per hour here. The 5 ACH target needs 200 CFM.
Honeywell Insight HPA5300B
Fits these inputs323 CFM of verified clean-air delivery gives about 8.1 air changes per hour here. The 5 ACH target needs 200 CFM.
This uses maximum-speed, pollutant-specific CADR and a five-air-changes-per-hour target. Quieter settings deliver less clean air. It does not substitute raw airflow or a one-change coverage claim.
Choice A
Honeywell, HPA300
HPA300
A straightforward high-airflow True HEPA workhorse with no ionizer, no app and no dependence on a particle sensor.
- Best matched use
- Smoke and pollen filtration for shoppers who want simple physical controls and widely available filters
Checked facts
- AHAM suggests 465 square feet, with CADR of 300 smoke, 320 dust and 300 pollen CFM.
- The HPA300 uses three certified True HEPA cartridges and a separate odor-reducing prefilter.
- Physical controls include four cleaning levels, a timer, dimmer and filter reminders.
Choice B
Honeywell, HPA5300B
Insight HPA5300B
A large, straightforward Honeywell with strong separate CADR figures and a VOC-responsive automatic mode, but no app.
- Best matched use
- A large room where verified airflow, physical controls and widely available filters matter
Checked facts
- Honeywell publishes smoke, dust and pollen CADR values of 323, 335 and 335 CFM.
- The 500-square-foot room rating is based on 4.8 air changes per hour.
- The cabinet measures 19.1 by 22.3 by 10.08 inches and uses a VOC sensor for automatic fan changes.
Meaningful differences
What changes the fit
| What changes | Honeywell HPA300 | Honeywell Insight HPA5300B | Why it matters |
|---|---|---|---|
| Smoke CADR | 300 CFM | 323 CFM | A smoke-specific rate is more useful than a one-air-change marketing room size. |
| Pollen CADR | 300 CFM | 335 CFM | The model with the higher smoke figure does not always have the higher pollen figure. |
| Cabinet width and depth | 20.1 × 10.8 in | 19.1 × 10.08 in | Match both dimensions to the actual gap and leave the manual clearance around the intakes. |
| Remote app control | No app | No app | Remote schedules matter when the purifier sits away from where you spend the day. |
| Automatic sensor response | Set speed manually | Included | An app and a pollution sensor perform different jobs. Schedules do not measure air quality. |
| Ionizer or electrostatic stage | none | none | Use this preference as a hard constraint if you want a purely mechanical filter path. |
What you give up
Every choice has a cost
If you choose Honeywell HPA300
- RTINGS measured roughly 39 to 60 dB, making it one of the louder choices at high airflow.
If you choose Honeywell Insight HPA5300B
- Three HEPA cartridges and a three-month carbon prefilter create a busy replacement schedule.
What matters in practice
How to make the call
The sizing upgrade is fairly small
The HPA5300B raises smoke CADR from 300 to 323. That adds about 35 square feet at five air changes and eight-foot ceilings. It is not a jump to a different class of room.
Understand what the sensor sees
Honeywell describes the Insight sensor as a VOC sensor. Its automatic response is useful for that input, but a VOC light should not be read as a dedicated PM2.5 measurement.
Buy the correct full filter load
Both use multiple HEPA filters in a larger cabinet. Compare the exact complete replacement set and compatible optional odor filters before judging ongoing cost.
What this comparison cannot tell you
- CADR uses the maximum rated fan speed. Minimum noise and maximum airflow are different operating points.
- These calculations compare particle-cleaning capacity. They do not promise health outcomes or removal of a specific gas.
What the facts say
What the comparison shows
Useful conclusions from the current air purifiers comparison, followed by the checked facts used to reach them.
Compared set
Only 14 of 70 models checked match every need here: “Wildfire smoke gets indoors”, “I have very little floor space”, and “I want it to react on its own”.
14 matching models from 70 checkedSee the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “Wildfire smoke gets indoors”, “I have very little floor space”, and “I want it to react on its own”. A need with no documented match does not count.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Honeywell HPA300 |
|
| |
| Honeywell Insight HPA5300B |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Honeywell HPA300
You prefer setting the fan yourself
See price & reviews on AmazonHoneywell Insight HPA5300B
You want the sensor to manage fan speed
See price & reviews on AmazonLinks open in a new tab.