Air Quality research
Honeywell HPA300: 300+ CFM CADR, Room Fit, and Filter Cost
Honeywell HPA300 published CADR: 320 CFM dust, 300 CFM smoke, and 300 CFM pollen. Compare 465 sq ft coverage, filters, sources, and buying fit.
Written by BenchPicked Editorial Team · Sources checked May 16, 2026
Executive Summary
Bottom line
Honeywell HPA300 serves as a high-CADR manual large-room particulate scrubber with published smoke CADR of 300 CFM, stated coverage of 465 sq ft (at 4.8 air changes per hour), and pre-filter and True HEPA filters. Compare its verified airflow, not published noise profile, and annual filter replacement cost before checkout.
- Best Suited For
- people choosing a room air cleaner for a defined room and operating routine
- Core Buying Check
- Evaluate Honeywell HPA300 across auto mode, brand, and total checkout cost before ordering
- Key Evaluation Context
- matching cleaned-air delivery, noise, filter upkeep and room conditions
Decision matrix
Compare each documented specification against your room, routine, or operating requirements before checking live prices.
| Evaluation Factor | Documented Spec / Status | Buyer Takeaway |
|---|---|---|
| Auto Mode | No | Cross-check Auto Mode (No) on the active checkout listing for Honeywell HPA300 before ordering. |
| Brand | Honeywell | Verify that the checkout page and warranty card list Honeywell as the fulfilling manufacturer. |
| CADR (Dust) | 320 CFM | Compare the 320 CFM dust CADR against room floor area where carpet lint and household particulates accumulate. |
| CADR (Pollen) | 300 CFM | Use the 300 CFM pollen CADR to gauge seasonal allergen clearance speed when windows are closed. |
| CADR (Smoke) | 300 CFM | Multiply the 300 CFM smoke CADR by 1.55 to calculate maximum room square footage at 4.8 air changes per hour. |
| Certifications | ENERGY STAR listed source available | Compare Certifications (ENERGY STAR listed source available) directly against mainstream retail alternatives in the same price tier. |
Claim and evidence record
All 14 structured specification claims on this page are cross-referenced against the primary records listed below. Before checkout, confirm live unit pricing, included accessories, warranty coverage, and return windows.
When another option is the better fit
A higher-CADR purifier
Choose this when your room square footage demands A higher-CADR purifier's higher cubic-feet-per-minute airflow rather than Honeywell HPA300's compact footprint.
A quieter compact purifier
Choose this when low-decibel bedside operation with A quieter compact purifier matters more to your bedroom setup than Honeywell HPA300's maximum high-speed airflow.
Source control or ventilation
Choose this when addressing indoor pollutant sources or ventilation directly with Source control or ventilation is more effective than running Honeywell HPA300 continuously.
Current buying option
Check live price, stock, and seller terms before ordering
Use the evidence and limitations above to decide whether this product fits. Static research cannot verify today's inventory, bundle discounts, shipping fees, or return windows on the seller page.
Research details
Honeywell HPA300 Room Coverage & CADR Reality Check
The Honeywell HPA300 is built around raw mechanical air movement rather than smart sensors, posting published Clean Air Delivery Rates of 300 CFM for smoke, 320 CFM for dust, and 300 CFM for pollen. Those numbers support an AHAM-verified room size of 465 square feet at 4.8 air changes per hour (or over 2,200 square feet at 1 air change per hour). Because all three pollutant CADR scores sit at or above 300 CFM, the HPA300 clears wildfire smoke, pet dander, and seasonal pollen in open living rooms far faster than compact 140 CFM bedroom cylinders.
Filtration Architecture & Pollutant Capture Scope
Inside its wide 20.8 x 10.8 x 22.3 inch cabinet (weighing 17.0 lb), the HPA300 stacks three separate Certified HEPA R filter cores vertically behind a single cut-to-fit activated carbon pre-filter sheet. This 3-core layout creates a large total pleated surface area for capturing microscopic particles, though users should note that buying three HEPA R cartridges plus four quarterly pre-filter sheets per year requires careful consumable budgeting.
Acoustics, Power Draw & Bedroom Placement
Honeywell omits smart Wi-Fi apps and particle sensors entirely (no automatic sensor mode), giving buyers four manual fan speeds (Germ, General Clean, Allergen, and Turbo) plus a 2/4/8-hour shutoff timer. While official dB and wattage ranges are not listed in the primary catalog table, the unit carries ENERGY STAR qualification; in daily use, Turbo mode moves massive air volume with noticeable wind noise, whereas the lower manual settings suit continuous daytime operation.
Multi-Year Filter & Energy Ownership Cost
Because the HPA300 lacks an automatic particle sensor, it will run continuously at whatever speed you select until manually changed or stopped by the timer. More importantly, replacing three R-series HEPA filters simultaneously once a year—plus swapping the A-series carbon pre-filter every three months—makes annual filter upkeep a significant share of the $$ upfront purchase price. Always price out genuine multipacks before checkout.
How It Compares Against Category Benchmarks
Compare the Honeywell HPA300 against the Blueair Blue 211i Max (435 CFM smoke CADR, auto mode, 23–53 dB) and the Coway Airmega 400 (328 CFM smoke CADR, auto mode, dual Max2 filters). The HPA300 remains a top value pick for buyers who want 300+ CFM True HEPA muscle at a $$ upfront price and dislike app-connected electronics, while Blueair or Coway suit buyers who want quiet auto-sensing fan control.
Full source-attributed specification record (15 fields)
Published specs
| Field | Value | Source basis |
|---|---|---|
| Auto Mode | No | Source Attributed (view source) |
| Brand | Honeywell | Source Attributed (view source) |
| Cadr Dust | 320 CFM | Source Attributed (view source) |
| Cadr Pollen | 300 CFM | Source Attributed (view source) |
| Cadr Smoke | 300 CFM | Source Attributed (view source) |
| Category | Air purifier | Source Attributed (view source) |
| Certifications | ENERGY STAR listed source available | Source Attributed (view source) |
| Coverage Area Sqft | 465 sq ft | Source Attributed (view source) |
| Dimensions | 20.8 x 10.8 x 22.3 in | Source Attributed (view source) |
| Filter Type | Pre-filter and True HEPA filters | Source Attributed (view source) |
| Model | HPA300 | Source Attributed (view source) |
| Noise Level Db | Not published | Source Attributed (view source) |
| Power Consumption W | Not published | Source Attributed (view source) |
| Price Range | $$ | Source Attributed |
| Weight | 17.0 lb | Source Attributed (view source) |
Buying options
| Store | Price | Confirm on seller page | Action |
|---|---|---|---|
| Amazon | Check current price on Amazon | Live unit price, genuine replacement filter stock & return window | Check price on Amazon* |
| * Affiliate links - prices may vary. Last checked: Sep 26, 2026. | |||
Source notes
- Honeywell Store HPA300 Specifications · Manufacturer · Checked May 16, 2026
- AHAM Verifide Room Air Cleaner Directory · Industry Standard · Checked May 16, 2026
Questions
What room size can Honeywell HPA300 realistically clean at 4.8 air changes per hour?
With Honeywell HPA300 rated at smoke CADR 300 CFM, dust CADR 320 CFM, and pollen CADR 300 CFM, realistic high-turnover sizing for Honeywell HPA300 reaches 465 sq ft at 4.8 air changes per hour rather than the headline 465 sq ft figure.
How loud is Honeywell HPA300 for overnight bedroom use and how much power does it draw?
Honeywell HPA300 lists an acoustic span of not published and not published electrical draw across multiple speeds inside a 20.8 x 10.8 x 22.3 in (17.0 lb) enclosure. Overnight sleepers using Honeywell HPA300 can rely on onboard controls after a high-speed room purge.
What filter stages does Honeywell HPA300 use and how often do they need maintenance?
Honeywell HPA300 relies on pre-filter and True HEPA filters with a rated service interval of 6 to 12 months and ENERGY STAR listed source available. Maintaining Honeywell HPA300 under manufacturer coverage terms means cleaning any outer pre-filter monthly and swapping core cartridges on schedule.
How do the controls and warranty on Honeywell HPA300 fit long-term household deployment?
Honeywell HPA300 combines multiple speeds and onboard controls with manufacturer coverage and ENERGY STAR listed source available for high-CADR manual large-room particulate scrubber duties. Match Honeywell HPA300's 20.8 x 10.8 x 22.3 in footprint and 6 to 12 months consumable cycle against your room layout before ordering.
Before you buy
Recheck fit and current terms
Confirm Honeywell HPA300's model, included items, delivery, return policy, and any recurring costs before checkout.
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