Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U) is rated 4.3 out of 5 by 88.

Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U)

Name: Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U)
Brand: Holmes
SKU: SAP_HAP242BU
Availability: InStock

Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U) is rated 4.3 out of 5 by 88.

Product Details

Description

The Holmes® Desktop Air Purifier with HEPA-type filter captures particles as small as 2 microns and operates quietly to remove up to 99% of airborne particles such as pollen, dust, mold, pet dander, and smoke, providing relief from odor and irritants in the air so you can breathe comfortably. The optional ionizer ensures particles are more easily captured and also tackles odors. The Holmes® Desktop Air Purifier can be placed vertically or horizontally and is designed to fit just about anywhere and effectively treat the air around you.

Features

REMOVES UP TO 99% OF AIRBORNE PARTICLES: The Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer captures particles as small as 2 microns from air passing through the HEPA-Type filter, removing up to 99% of airborne particles and allergens, such as pollen, dust, mold, pet dander, and smoke from the air so you can breathe more comfortably.
INCLUDES IONIZER: This Holmes® air purifier features an optional air ionizer that helps to bind negative ions to airborne smoke, dust, and pollen to form larger particles that are more easily captured, helping to clean air more thoroughly and tackling odors
70 CADR: Air purifier provides a 70 CADR (Clean Air Delivery Rate)
CUSTOMIZABLE SETTINGS: 3 speed settings to help you keep your air clean and pure
SLIM DESIGN, IDEAL FOR SMALL ROOMS: Recommended for rooms up to 109 sq. ft.; can be placed vertically or horizontally anywhere, including a table or desktop.
DURABLE: 3-year limited warranty

Specifications

Model: HAP242B-U
Dimensions: 9.7x13.0x6.3
Wattage: 45
Filter Technology: hepa-type
Color: White
Room Size: small
Power Source: 2-Prong Plug (Polarity type)

Where to Buy

The following link will take you to a site outside of Holmes Products.

Rated 5 out of 5 by va3592 from Great product for desk and great price! Hi. This is a great product that helps me with my allergies at my desk at work. I have always had allergy flare ups in my current workplace office. After getting this product, it feels like I can breath so much better and don't have as many allergy flare ups at my desk. I have it at my desk right beside me, and on any of the settings it is not too loud or bother me or my coworkers. I tend to keep it on the lowest or second lowest fan speed setting. I don't use the ionizer very often. I also like the aer1 true-hepa replacement filter. Thanks for making great products that anyone can afford!

Date published: 2016-03-01

Rated 3 out of 5 by sexykitten from Works ok I have bought two at the same time and started using mines about one 1/2 months ago and i have noticed a difference but i still need to get maybe 6 more cause i have big apt. I have dirty air ducts from my landlord not wanting to clean them . I first saw these on amazon and and bought them there and so these desktop purifier seems to help . I how ever been having runny nose these past few days so i either need to get air ducts cleaned out or keep buying these for ever room . If anyone one or company have advise on what i need to do far as my air ducts need to be clean let me know cause i do not feel i have to clean them out cause i do not own this house.

Date published: 2018-02-05

Rated 5 out of 5 by MeasurementBlues from Prevents headaches I've used an older model (white) model for several years. I keep it near the bed and it prevents me waking up with headaches. Without it, I'd have to wipe down the room every night. As someone noted below, the inside eventually got dirty. I took the unit apart to clean the inside. I even managed to get all the screws back where they belong. Four screws were hidden under the feet and a strip. I'll cut off the ends of the strip exposing the screws so next time, I can leave the strip in place and have access to the screws. It's possible that the unit got dirty inside because I may have bought an after-market filter.

Date published: 2023-06-05

Rated 1 out of 5 by Turnemic from I have the older model Bought the model before this one I believe HAP9240. I consistently cleaned the unit and changed the filter each month with the green quality AER HEPA filters. I thought it was working well until I shined a flashlight down the outlet side of the unit, (where the fresh "purified" air is coming out of) and it was filthy. Yes I have the filter in right and yes it has a good seal. I know it's a cheap purifier but I wasn't expecting that amount of dirt and particles on the fresh air side of it. I enjoy Holmes products and I'd like to see Holmes make this right and correct it.

Date published: 2019-04-03

Rated 5 out of 5 by DancinDi from Stops nearby dust and smoke pronto Positioning this small air purifier is critical. I have one over the cat litter boxes in our RV. I use non perfumed litter so dust smell is my enemy. I have asthma and allergies. This air cleaner with the ionizer on works so well that we hardly notice the litter boxes. I also add a large hepa at night during high pollen. My daughter uses hers at night near the bed. It cleans and creates white noise. She is an LPN and adores her air cleaner and her sleep. Our third 242 is near the computer in the guest room at our cottage. Great for cleaner smells and white noise. This room has carpet and tends to have an odor that I can smell. Not so with the ionizer on.

Date published: 2018-11-23

Rated 5 out of 5 by danichance from Great product. Totally limits dust. I love using this at night as white noise, SOOOOO much better than a fan!!

Date published: 2017-10-24

Rated 5 out of 5 by Jill lee from They last forever I bought this to replace one I had for 45 years. It was still working but when I saw this one on sale. Well it was a sale. I once tried another company that had a TV commercial showing how quickly it removed air pollutants. Well it blew up and caught fire in less then 30 days. From then on I will only buy Holmes products and you should too

Date published: 2018-01-21

Rated 3 out of 5 by Nells from Cleans well, but is rather loud I have had mine for some years now, and just looking at the old filters tell you it cleans well. BUT, it is so darn LOUD! I have always slept with a purifier running because I can't sleep with it too quiet. But this machine is right on that too-loud threshold. Granted, it is in a very small room, but my older machines had a more reasonable volume. Another downside is I can't figure out how to take the case apart for a good deep cleaning. Older styles were very easy. I had to borrow someone's air compressor to get all the dust blown out of it, which was making it even louder. So, if you want a machine that filters well, this one will make you happy. If you need to sleep with White Noise, this will also help, but it may be a bit too loud for you if you have it in a small room.

Date published: 2016-12-08

Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U) Reviews - page 2

<div id="bvseo-questionsSection"> <div class="bvseo-question-answer" data-questionid="8864247"> <h2 class="bvseo-question"> I just unearthed this product after &gt;15 years in its box on a shelf. With out of control allergies this spring, I&rsquo;d like to try this purifier to see if it will help. I found the HEPA filter replacement, but cannot find the foam prefilter. Can you help? </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: Dmarko64</div> <div class="bvseo-answer" data-answerid="7907463"> Hi there, Dmarko64! Thank you for choosing Holmes&reg;️. We hope you are doing well and safe. We are more than happy to assist you. The replacement carbon filter for the air purifier model HAP242B-U, is the filter part number BHOR311. If you need further assistance regarding this matter, you may reach us by visiting the Contact Us page of this website. We're here for you Monday to Friday from 9:00 am till 5:00 pm EST. Our product specialists will be more than happy to help you. Have a nice day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2023-04-13</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5513923"> <h2 class="bvseo-question"> I wasn&rsquo;t aware to only leave the ionizer on for 8 hours at a time. Mine has been on since I got my air purifiers. Does this damage the purifiers? And why is it bad to leave them on? Thank you!&nbsp; </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: katbrown01</div> <div class="bvseo-answer" data-answerid="7539622"> Hi katbrown01! Thank you for choosing Holmes&reg;️. We are more than happy to assist you with your concern. You can run ionizer between 12 and 24 hours. The more often you run your air purifier, the better it'll do at cleaning your air. Ionizers are helpful if you have allergies, asthma, or chemical sensitivities, as ionic air purifiers more effectively remove pollutants ranging from pollen, mold, dust, and pet dander to viruses, smoke, odors, and chemical toxins. We hope this information helps. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-15</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5540933"> <h2 class="bvseo-question"> How to clean inside </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: MaeLee</div> <div class="bvseo-answer" data-answerid="7539406"> Hi MaeLee! Thank you for choosing Holmes&reg;️. We are more than happy to assist you with your concern. If you wish to clean the inside part of your air purifier, we advise for you to use a soft damp cloth to wipe the dust inside, and use a can of compressed air to remove small particles on some parts. Please avoid washing any parts inside with water for your safety and mechanism of the unit. We hope this information helps. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-15</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5602092"> <h2 class="bvseo-question"> I kept the ionizer on for a few days by accident. Will that effect the overall efficiency of the product? </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: CLizaG</div> <div class="bvseo-answer" data-answerid="7537077"> Hi CLizaG! Thank you for choosing Holmes&reg;️. We hope you are staying healthy and safe. We understand that the ionizer stays on for few days and you want to know if that affect the overall efficiency of the air purifier. We are more than happy to assist. Upon checking, that will not affect the efficiency of the unit however, the ionizer in this appliance produces less ozone than the UL* established limits of 50ppb. However, in high concentrations, ozone can be harmful to birds and small pets. To prevent ozone buildup, we suggest using the ionizer in well ventilated areas with the air purifier fan on and you may want to run the ionizer less often. I hope this information helps. Have a nice day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-13</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5573361"> <h2 class="bvseo-question"> Do this product come with at least one filter Already in the product? Or do you have to purchase filters separately? I only need this for a short time which is why I was curious about the product having one filter included. </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: Libby Ann</div> <div class="bvseo-answer" data-answerid="7535705"> Hi Libby Ann! Thank you for choosing Holmes&reg;️. We are more than happy to assist you with your concern. Yes, our air purifiers come with a stock filter when newly bought. The filter may automatically be placed inside of the unit, or needs to be mounted first. We hope that we were able to help you out. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-12</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5605855"> <h2 class="bvseo-question"> Does this have the ionizer or not? &nbsp;Listed as optional.&nbsp; </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: DavidJW</div> <div class="bvseo-answer" data-answerid="7534486"> Hi DavidJW! Thank you for choosing Holmes&reg;️. We are more than happy to assist you with your concern. The air purifier model HAP242B-U has an ionizer feature. It is called 'optional ionizer' because it can be turned on/off depending on your personal preference. When turned on, the optional ionizer feature releases negative ions into outgoing filtered air to help the air purification process. We hope that we were able to help you. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-11</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5628507"> <h2 class="bvseo-question"> Does the unit have an indicator light to let you know when filters need replacing? </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: Moongma</div> <div class="bvseo-answer" data-answerid="7534467"> Hi Moongma! Thank you for choosing Holmes&reg;️. We are more than happy to assist you with your concern. No, this air purifier model HAP242B-U does not have a filter indicator. However, in terms of changing your filter: Filter life will vary, depending on air quality and usage. Under normal conditions of continuous use, Filters with a 4 month filter life: Wash the foam pre-filter and replace the filter(s) after 4 months of operation. Filters with a 12 month filter life: After 4 months of operation, it is recommended to wash the foam pre-filter. We hope that we were able to help you. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-11</div> </div> </div> <div class="bvseo-question-answer" data-questionid="5604307"> <h2 class="bvseo-question"> I have 2 Holmes HAP242 series, HEPA-Type Desktop Air Purifiers, 4 yrs old. We need new/stronger air filters that will lesson allergies, ahsma, pet dander. We are in our late 60's. Will the filters your website lists, fit my older model? 
thanks-KL </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: krabby</div> <div class="bvseo-answer" data-answerid="7534433"> Hi krabby! Thank you for choosing Holmes&reg;️. We apologize for the confusion, ware more than happy to assist you with your concern. Since you're looking for a replacement filter that will help you will your allergies and pet dander, we recommend that you use the HAPF300AHD aer1 True HEPA Allergen Remover Air Purifier Filter. It can be purchased through our partner retailers Amazon, Walmart, and Target online or physical stores. We hope that we were able to help you. Have a wonderful day! <div class="bvseo-author">Answered by: Holmes Consumer Care</div> <div class="bvseo-pubdate">Date published: 2022-07-11</div> </div> </div> </div> <script type="text/javascript"> if (document.getElementById('bvseo-questionsSection')) { document.getElementById('bvseo-questionsSection').style.display = 'none'; } </script>   <ul id="bvseo-paginationSection"> <li class="bvseo-paginationItem"><a class="bvseo-paginationLink" href="https://www.holmesproducts.com/air-purifiers/desktop/holmes-desktop-hepa-type-air-purifier-with-optional-ionizer-small-air-purifier-hap242b-u/SP_397575.html?bvrrp=Main_Site-en_US/questions/product/2/SP_397575.htm">Holmes® Desktop HEPA-Type Air Purifier with Optional Ionizer Small Air Purifier (HAP242B-U) Questions - page 2</a></li> </ul>  <ul id="BVSEO_meta" style="display:none!important"> <li data-bvseo="bvDateModified">y_2025, m_7, d_15, h_8CST</li> <li data-bvseo="ps">bvseo_bulk, prod_bvqa, vn_bulk_3.0.42</li> <li data-bvseo="cp">cp_1, bvpage1</li> <li data-bvseo="co">co_hasquestionsanswers, tq_178</li> <li data-bvseo="cf">loc_en_US, sid_SP_397575, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]</li> <li data-bvseo="diagnostics">clientName_holmes</li> </ul>  <ul id="BVSEOSDK_meta" style="display: none !important;"> <li data-bvseo="sdk">bvseo_sdk, dw_cartridge, 18.2.0, p_sdk_3.2.0</li> <li data-bvseo="sp_mt">CLOUD, getContent, 0ms</li> <li data-bvseo="ct_st">questions, product</li> </ul>