Dyson
Dyson Purifier Hot+Cool Formaldehyde HP09
Air purifiers
$799List price
Explore this product Your shortlist, side by side
Dyson Purifier Hot+Cool Formaldehyde HP09 vs Honeywell HPA300 HEPA Air Purifier
Find the differences that matter for your next decision.
Honeywell
Honeywell HPA300 HEPA Air Purifier
Air purifiers
$249List price
Explore this product What matters most to you?
Start with all rankable specifications, or focus on a particular use.
Your starting point
Tied overall. Honeywell HPA300 HEPA Air Purifier is cheaper.
- The 6 rankable overall specs split 3 to 3.
- Saves $550 at list price.
How we reached this
We compare the published specifications relevant to your priority. Each rankable specification counts once; your selected requirements can rule a product out. This is a guide to the numbers, not a laboratory performance score.
The trade-off to know
Honeywell HPA300 HEPA Air Purifier: High power consumption (up to 130W on Turbo)
Look at the differences ↓Refine your requirements
What would rule one out?
Side by side
The differences, in detail.
Start with the key specs, then explore as much as you need.
| What you’re comparing | Dyson Purifier Hot+Cool Formaldehyde HP09 | Honeywell HPA300 HEPA Air Purifier |
|---|---|---|
| CADRPerformance | 190 CFM class (Air Multiplier 77 gallons/sec circulation) | 300 CFM (Smoke), 320 CFM (Dust), 300 CFM (Pollen) |
| Room sizePerformance | Medium to large bedrooms, living rooms up to 500 sq ft | Extra large rooms, master suites, open spaces up to 465 sq ft (4.8 ACH) |
| Coverage areaPerformance | 500 sq ft room size with 350° oscillation | 465 sq ft (4.8 air changes/hr) / 2,250 sq ft (1 air change/hr) |
| Filter typesFilters | 360° Glass HEPA H13 + Activated Carbon + Cryptomic Formaldehyde filter | Type A Activated Carbon Pre-filter + 3× Type R True HEPA filters |
| Filter lifeFilters | 12 months (HEPA/Carbon) / Permanent Formaldehyde catalyst | 3 months (Pre-filter) / 12 months (True HEPA filters) |
Showing 5 of 11 specifications. Missing values stay unlisted. About the sources
Both sides of the decision
What you gain. What you give up.
Dyson Purifier Hot+Cool Formaldehyde HP09
Reasons to choose it
- Combines HEPA H13 purification, fast ceramic heating, and cooling fan in one
- Destroys formaldehyde continuously without filter replacement
- Fully sealed whole-machine HEPA H13 standard prevents bypass
Worth considering
- CADR airflow is lower than dedicated box purifiers
- Expensive upfront purchase price
Honeywell HPA300 HEPA Air Purifier
Reasons to choose it
- Powerful high-volume CADR (300+ CFM) for large rooms up to 465 sq ft
- Certified True HEPA captures 99.97% of airborne particles
- Durable workhorse build with touch-button controls
Worth considering
- High power consumption (up to 130W on Turbo)
- No Wi-Fi app or smart automated air quality sensors
Beyond the spec sheet
Living with your choice.
Explore the ownership details available for this pair.
What three years could cost
Dyson Purifier Hot+Cool Formaldehyde HP09
3-Year Estimated Total$1,039
Honeywell HPA300 HEPA Air Purifier
3-Year Estimated Total$444
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Dyson
Cylindrical base: needs 12 in airflow clearance around unit
Honeywell
Front grille intake: can back up close to baseboards
Nighttime Sleep Mode Noise
Dyson
28 dB night mode with dimmed LCD
Honeywell
30 dB lowest fan speed (noticeable background white noise)
Unit Footprint & Dimensions
Dyson
Bladeless oval loop (30.0 × 8.1 × 8.1 in; 12.6 lb; heats & cools)
Honeywell
Large commercial-grade shell (20.8 × 22.3 × 10.8 in; 17.0 lb)
Everyday ownership notes
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Dyson: What to watch for
- Hidden Cost
High replacement filter cost (~$80 each).
Honeywell: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Know what’s behind the comparison
Published specs. Visible sources.
Clinchmark compares manufacturer specifications and other published information. We have not independently lab-tested these products. Editorial assessments and unknown values are identified in the specification details.
Catalog snapshot: September 1, 2026. Prices, availability, and provider terms can change.
Still weighing it up?
Which is cheaper, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Honeywell HPA300 HEPA Air Purifier?
Honeywell HPA300 HEPA Air Purifier costs $550 less at list price.
What is the biggest catch with the Dyson Purifier Hot+Cool Formaldehyde HP09 or Honeywell HPA300 HEPA Air Purifier?
Both has this deal-breaker: over 55 dB on high. Louder than normal conversation at full speed.
Which is better for bedrooms, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Honeywell HPA300 HEPA Air Purifier?
Tied on bedrooms. Honeywell HPA300 HEPA Air Purifier is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $550 at list price.
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 5 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.
A few other possibilities.
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