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  • HEPA Filtration: this home air purifier helps capture up to 99.97% of the following microscopic airborne allergens and particles: dust, pollen, pet dander, dust mite debris and smoke.1
  • This portable air purifier uses an activated carbon pre-filter that helps capture large airborne particles and reduce odors and VOCs.3
  • Independently tested and AHAM Verifide to circulate and filter room air up to 4.8 x per hour in a 465 sq. ft room.2 (large room air purifier)
  • Easy to use touch controls.
  • 3 Cleaning Levels (high/medium/low) with a Turbo Setting make this an excellent air purifier for allergies
  • Silent operation allows for a quiet air purifier experience
  • Filter Change Indicator and Reset.
  • Auto-Off timer option at 2, 4, or 8 hours.
  • Dimmer option for control panel lights.
  • Silent operation makes this a quiet air purifier to implement
  • The Honeywell HPA300 Air Purifier has earned the ENERGY STAR label by meeting strict energy efficient guidelines set by the U.S. EPA. Room air purifiers have demonstrated the potential for improving air quality and providing health benefits. EPA does not endorse manufacturer claims regarding the degree to which a specific product will produce healthier indoor air.
  1. From the air that passes through the filter, 0.3 microns and larger.
  2. Based on 3rd party independent CADR testing for the smoke CADR value when operated at the highest level. Air circulation depends on many factors, such as room size and configuration. There is no guarantee that all of the air in a room will pass through the filter.
  3. When operated with the odor reducing pre-filter. It is recommended to always use the pre-filter when operating this air purifier. This product does not reduce or adsorb carbon monoxide gas. Make sure gas appliances are well ventilated.
Manuals

The Honeywell HPA304 True HEPA Allergen Remover has been engineered to help capture up to 99.97% of airborne allergens and particles.1 This portable air purifier is highly effective at capturing airborne particles such as dust, smoke, pollen, pet dander and mold spores in large rooms (4.8 x air changes per hour in a 465 sq. ft.).2 This makes it a popular choice as an air purifier for allergies or a pet air purifier. An odor reducing pre-filter and True HEPA filter are paired to help capture odors and VOCs.3 The Honeywell HPA304 True HEPA Air Purifier with Allergen Remover includes three cleaning levels and a turbo setting that can be conveniently accessed via an easy to use touch control interface. Visual filter check reminders and an automatic shut off timer have also been included to ensure that the Honeywell HPA300 is operating as efficiently as possible.

A+ Genuine Pre-Filter

This portable air purifier works with the Honeywell A and A+ Pre-Filter. The Pre-Filter is the first level of filtration and helps capture large particles such as dust, lint, fibers and pet fur and helps to reduce VOCs & odors from cooking, smoke, bathrooms and pets. This filter should be replaced every 3 months. The filter check/reset light will remind you when it's time to change your filter. Initial filter is included. To ensure stated product performance, use only genuine and certified Honeywell replacement filters.

R Certified True HEPA Filter

The Certified Honeywell True HEPA R Replacement Filter helps capture up to 99.97% of microscopic allergens, 0.3 microns & larger from any air passing through the filter. For optimal cleaning performance, replace your HEPA filter every 12 months. The filter check/reset light on the HPA300 Air Purifier will remind you when it's time to change your filter. Initial filter is included.

AHAM Verifide

This air purifier for allergies is AHAM (Association of Home Appliance Manufacturers) Verifide meaning that it has been independently tested to ensure its efficiency in reducing smoke, dust and pollen in the suggested room size. The AHAM assigns a CADR (Clean Air Delivery Rate) Rating that measures the volume of filtered air delivered by an air cleaner. The Honeywell HPA304 True HEPA Air Purifier received the following CADR Rating:

  • 4.8 Air changes per hour in a 465 sq. ft. room
  • Tobacco Smoke: 300
  • Dust: 320
  • Pollen: 300
How effective is the HPA304 at removing allergens?
The Honeywell HPA304 is a high efficiency particulate air (HEPA) air purifier, which means it can remove up to 99.97% of airborne particles 0.3 microns and larger. This includes dust, pollen, pet dander, and mold spores. The portable air purifier also has an activated carbon pre-filter that helps remove odors and VOCs.
How big of a room can the Honeywell HPA304 clean?
The Honeywell HPA304 is rated to clean rooms up to 465 square feet. This makes it a large room air purifier. However, the actual size of the room that the HPA304 can clean will depend on the level of air pollution in the room.
How loud is the Honeywell HPA304?
The Honeywell HPA304 has four fan speeds, and the noise levels vary depending on the speed. At the lowest speed, this home air purifier is about as quiet as a whisper. At the highest speed, the portable air purifier is about as loud as a normal conversation.
How often do I need to change the filters on the Honeywell HPA304?
The Honeywell HPA304 comes with a pre-filter and a HEPA filter. The pre-filter should be replaced every 1-3 months, and the HEPA filter should be replaced every 6-12 months. The actual replacement schedule will depend on the level of air pollution in the room.
What filters do I need for the HPA304?
The HPA304 uses Replacement True HEPA Filter R and Replacement Pre-filter A.
How do I reset my Check Filter or Check Pre-filter light?
After you change your filter, the "Check Filter or "Check Pre-Filter" light will remain on until it is reset. With the air purifier powered on, press the lighted button, and hold for approximately 2 seconds until the light turns off. The electronic filter check is now reset.
My Air Purifier is starting to make noise and the air output is less. What's wrong?
The filters may be dirty. High amounts of contaminants can block the pores in the filter and stop the air from moving through it. Replace the Filters. The HEPA Filters should be replaced every year and the Pre-Filter and Enhanced Odor and VOC Filters should be replaced every 3 months. Please note these are guidelines only and filters should be checked periodically as individual home conditions may vary. To ensure the unit is performing properly, replace with Certified Genuine Honeywell Filters.
How long should I run my Air Purifier?
In general, the unit will be most effective when doors and windows are closed. It is recommended that you run your air purifier while you are at home to help clean the air. If desired or conditions warrant, you may run your air purifier 24 hours a day
Can I wash any of the filters in my Air Purifier?
No. Washing the filters in your air purifier will ruin them.
What are VOCs?
Volatile Organic Compounds (VOCs) are emitted from various solids and liquids such as paints, cleaning supplies, building materials, and permanent markers. Some of these compounds can have adverse short and long term health effects and consistently have higher concentrations indoors than outside.
Do Honeywell Air Purifiers Emit Ozone?
No, Honeywell HEPA Air Purifiers use HEPA Filtration that does not release ozone into the surrounding area.
Product Details
  1. From the air that passes through the filter, 0.3 microns and larger.
  2. Based on 3rd party independent CADR testing for the smoke CADR value when operated at the highest level. Air circulation depends on many factors, such as room size and configuration. There is no guarantee that all of the air in a room will pass through the filter.
  3. When operated with the odor reducing pre-filter. It is recommended to always use the pre-filter when operating this home air purifier. This air purifier does not reduce or adsorb carbon monoxide gas. Make sure gas appliances are well ventilated.
Product Specs
UPC:
328785001693
MPN:
HPA304
Category:
Air Purifiers
Product Manuals

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49 Customer Reviews

4.9 Overall rating
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Honeywell HEPA Air Purifier with Allergen Remover for Extra Large Rooms, White Reviews
LUIS M
June 15, 2021
Verified Purchase
So far so good!

The air in my office is noticeably cleaner. My allergy symptoms have subsided dramatically since I started using the Honeywell Tru HEPA Whole Room Air Purifier.

Thomas F
June 3, 2021
Verified Purchase
Quiet and effective

I was surprised by how quiet this air purifier is compared to others on the market. Sure, the turbo setting is loud, but that's understandable, and you only need to use it every so often. The purifier is simple and effective, it's really just a fan sucking air through HEPA filters, which is all you really need ie, no ozone like you get with ionizing purifiers. So far, so good.

Melissa R
May 23, 2021
Verified Purchase
Helps with sleeping

We bought this air purifier during the height of covid, just wanted something running in the background in our bedroom. After covid now, we found this purifier to help us sleep. It kept our air fresh in the winter when it was hard open windows. I definitely would recommend this to others.

Jean N
April 16, 2021
Verified Purchase
Love my new air purifier

My new honeywell air purifier has been an excellent purchase. Has helped relieve my allergy symptoms. The turbo setting is a bit loud but all 3 other settings are just fine for my 500 sq ft open air LR/DR/Kitchen set up. I purchased this after reading reviews on it by consumer report

Sharon C
March 23, 2021
Verified Purchase
Excellent Air Purifier

I purchased this air purifier after receiving great feedback and reading reviews. My daughter who has allergies has noticed a difference almost immediately.

Marie Mulcahy
March 17, 2021
Verified Purchase
Bunny's HEPA

Quiet, efficient. I bought the white and I am quite pleased with it.

Joseph Stern
March 12, 2021
Verified Purchase
Works very well

The unit works as well as described. Unfortunately one of the clips holding the front cover was broken. This does not impede the extremely well working unit.

Roberta Harris
February 12, 2021
Verified Purchase
Honeywell

System is running fine. Using in my sewing area where I sew, cut, press for about 4 hrs a day. Feel it is already making a difference with the finer dust

Nancy Alewine
February 3, 2021
Verified Purchase
new product

I have 3 Honeywell room air purifiers in my home. one of the quit working and I ordered this one. It is much quieter than the one it replaced and has more features. so far I LOVE it

Lauren BR
January 31, 2021
Verified Purchase
Amazing Product

Absolutely love this filter! I have severe allergies and asthma and could tell that night it made a big difference. I like that I can dim light.

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