Indoor dust and allergens can aggravate health and comfort. True HEPA filtration (99.97% at 0.3 µm) plus activated carbon for odors is the most common effective approach. When shopping, match CADR to room size, consider filter costs, and confirm a model's ozone emissions and third-party performance data. Honeywell offers a range of HEPA-based room purifiers; verify each model's specs before purchase.

Why indoor air matters

Cleaning moves dust and particles from surfaces into the air. Those particles can irritate allergies, carry bacteria, and reduce indoor comfort. For many households, a room air purifier is a practical step to reduce airborne dust, pollen, pet dander, smoke and some odors.

What to look for in a purifier

Choose a purifier based on three practical factors: filtration type, room size, and maintenance cost.

Filtration type

True HEPA filters capture 99.97% of particles 0.3 microns and larger, which covers most common allergens. Activated carbon or charcoal layers help reduce odors and some volatile organic compounds (VOCs). Avoid devices that intentionally generate ozone; ozone can be harmful at indoor concentrations.

Room size and CADR

Match the unit to the room. Look for Clean Air Delivery Rate (CADR) ratings for smoke, dust and pollen to compare expected performance in a given space. Higher CADR numbers mean faster air cleaning.

Maintenance and running cost

Check filter replacement intervals and prices. Washable pre-filters extend life of the HEPA element. Also consider energy use and fan speeds - running a purifier continuously on a lower setting typically gives the most consistent benefit.

What Honeywell offers today

Honeywell is a long-established brand in consumer air purifiers and supplies a range of room units that commonly use True HEPA filtration combined with pre-filters and optional carbon stages. Many of these models are designed for bedroom and living-room use, with multiple fan speeds and simple controls. Several Honeywell units are intended to operate quietly overnight.

Some Honeywell purifiers are mechanical (filter-based) and do not produce ozone during normal operation; check the product specifications if you are concerned about ozone emissions.

Also look for independent CADR or third-party test results when comparing models to understand real-world performance. 1

Practical tips for use

  • Place the unit away from obstructions and near the breathing zone (e.g., across from seating areas).
  • Run it continuously during high-allergen seasons or when people are home and active.
  • Replace HEPA and carbon filters per manufacturer guidance; clogged filters reduce performance.
  • Combine filtration with source control (no smoking indoors, damp-mopping instead of sweeping) and ventilation when possible.
A correctly sized HEPA air purifier can significantly reduce airborne particles in a room. Use CADR, filter type and maintenance costs to choose a unit that fits your space and needs, and verify specific Honeywell model specs before purchase. 2
  1. Confirm which specific Honeywell models are mechanical (non-ozone) and document ozone emission statements from product specs or manufacturer.
  2. Verify which Honeywell models have AHAM or independent CADR ratings and collect those CADR numbers for model comparisons.
  3. Confirm up-to-date Honeywell product lineup and common model features as of 2025.

FAQs about Honeywell Air Purifier

Do HEPA filters remove viruses?
HEPA filters capture particles in the size range of many respiratory droplets and aerosolized carriers, so they can reduce airborne viral particles but do not "sterilize" air or replace vaccination and ventilation. Filtration is one layer of protection.
What does CADR mean and why does it matter?
CADR (Clean Air Delivery Rate) measures how quickly a purifier reduces smoke, dust and pollen in a room. Higher CADR values indicate faster cleaning and help you size a unit for your room.
Are ozone-generating purifiers safe?
No. Ozone at indoor concentrations can irritate the lungs and is not recommended for routine air cleaning. Prefer devices that use mechanical HEPA and activated carbon filtration.
How often should I replace filters?
Follow the manufacturer's schedule: many HEPA filters need replacement every 6-12 months depending on use and pollution levels. Pre-filters may be washable and extend HEPA life.
Will a purifier remove household odors?
Units with activated carbon or charcoal stages can reduce many odors and some VOCs, but they have limited capacity and eventually require filter replacement.