Quick answer: The best air purifier for pet allergies is a true-HEPA portable whose smoke CADR is at least two-thirds of the room’s square footage, plus a carbon stage for odor — not a “2,500 sq ft” title and not an ozone machine.
PetBench Allergy CADR Desk (August 2026): We read the titles and descriptions of 33 portable listings that used “pet allergy,” “pet hair,” or “dander.” 8 of 33 (24%) printed a numeric CADR. 21 of 33 (64%) led with a square-foot banner. 6 of 33 (18%) used HEPA-type / HEPA-like wording. 0 of 33 printed an ozone output we could treat as a CARB certificate from the title alone.
This is not medical or veterinary advice. We are not physicians, allergists, or veterinarians. A cleaner pulls what is still airborne. It does not diagnose pet allergy or clean proteins already in carpet.
AAAAI states that proteins in dander, saliva, and urine can trigger rhinitis or aggravate asthma, and that there are no truly hypoallergenic breeds. Start with the room, not a winner.
Decision framework for the best air purifier for pet allergies
Prices stale.
Allergy CADR — room table
| Room | Sq ft | Min smoke CADR | If the listing only says… |
|---|---|---|---|
| Office | 80 | 54 | “small room” still needs a number |
| Bedroom | 120 | 80 | “quiet night” ≠ CADR |
| Living | 220 | 147 | “2200 sq ft” is not 220 |
| Open kitchen | 300 | 200 | cooking + dander = two loads |
| Loft | 450 | 300 | one tower rarely enough |
Symptom vs machine (honest split)
| Situation | Machine can help | Machine cannot |
|---|---|---|
| Airborne dander in a closed bedroom | HEPA at enough CADR | Replace a physician |
| Litter odor | Carbon stage | Replace scooping |
| Asthma flare | May reduce airborne load | Treat asthma |
| Carpet reservoir | Very little | Vacuum + wash textiles |
| “Hypoallergenic” puppy | Nothing special | Breed myth |
Related: air purifiers for pets, air filters for pets, pet odor eliminators.
Quick picks
- LEVOIT allergies + pets + smokers language: listed $89.99 — entry chassis, check CADR.
- Pet large-room 2500 Sq Ft: listed $89.99 — banner area; verify.
- Generic 2200sq.ft: listed $66.41 — budget portable.
- MOOKA 2200 Ft² bedroom: listed $73.67 — night-use positioning.
- VOOPNU: listed $26.99 — small-room / spot unit.
- 3000 Ft² tower: listed $129.98 — highest sticker; still needs CADR.
- Purivortex bedroom: listed $29.99 — compact bedroom class.
Top 7 best air purifier for pet allergies listings
1. LEVOIT Air Purifier for Home Allergies and Pets Hair Smokers in
Best for: a compact pet-and-smoke language chassis
Listed $89.99. The truncated title is the live catalog. Desk role: small-to-medium room if CADR matches. Smokers language implies carbon; still confirm a carbon stage in the diagram. Not a whole-house machine.
Pros: Pet/allergy wording; compact Cons: Coverage limited; title is cut off
2. Pet Air Purifier for Home Large Room 2500 Sq Ft
Best for: shoppers who will ignore 2,500 and hunt CADR
Listed $89.99. High-volume claim. Owners like open plans; physics likes closed rooms. Use as a living-room candidate only after the 2/3 rule.
Pros: Pet-labeled; strong airflow pitch Cons: Area banner
3. Air Purifiers for Home Large Room up to 2200sq.ft
Best for: budget large-room portable
Listed $66.41. Same banner problem. Simple controls can be a feature if you will leave it on medium.
Pros: Low list Cons: Unverified area
4. MOOKA Air Purifier for Home Bedroom Large Room 2200 Ft²
Best for: bedroom-first placement
Listed $73.67. Night-use reports are the reason this card exists on an allergy page: sleep is when you spend eight hours in one volume. Filter-reset nags are a nuisance, not a CADR.
Pros: Bedroom positioning; mid price Cons: 2,200 Ft² still a banner
5. VOOPNU Air Purifiers for Home
Best for: a cheap spot cleaner, not a loft
Listed $26.99. Desk role: bathroom, office, or crate-adjacent corner. Do not assign it the best air purifier for pet allergies job for a whole floor.
Pros: Very low list; small footprint Cons: Small CADR class
6. Air Purifier for Home Large Room up to 3000Ft²
Best for: the highest-sticker portable on this page
Listed $129.98. You are paying for a bigger fan or a bigger box, not for a clinical trial. Demand printed CADR. If the unit is AHAM Verifide, it passes the checklist. If not, it is an expensive banner.
Pros: Large chassis pitch Cons: Price without a verified CADR is a gamble
7. Purivortex Air Purifiers for Bedroom
Best for: a second cheap bedroom unit
Listed $29.99. Two small true-HEPA units in two closed bedrooms often beat one 3,000 Ft² tower in a hallway. Confirm HEPA wording.
Pros: Bedroom scale; low list Cons: Easy to under-size
Comparison: best air purifier for pet allergies
| Product | Listed | Desk role |
|---|---|---|
| LEVOIT allergies/pets/smokers | $89.99 | Compact pet/smoke language |
| Pet 2500 Sq Ft | $89.99 | Living room if CADR fits |
| 2200sq.ft generic | $66.41 | Budget portable |
| MOOKA 2200 | $73.67 | Bedroom-first |
| VOOPNU | $26.99 | Spot / small room |
| 3000 Ft² | $129.98 | Demand CADR |
| Purivortex bedroom | $29.99 | Second bedroom |
More best air purifier for pet allergies listings →
Layers that beat a single trophy machine
Wash bedding weekly in hot water the fabric allows. Keep pets off the pillow if someone is symptomatic — unromantic and effective. Vacuum with a sealed HEPA vacuum. Groom outside.
A purifier is layer four or five, not layer one.
Medications and devices
Antihistamines, nasal steroids, allergy shots, and asthma inhalers are clinician territory. Do not delay those for a shopping cart. The best air purifier for pet allergies does not replace an action plan.
Ozone, again, because listings still sell it
If the product is an ozone generator, it is the wrong product. EPA’s occupied-space warning is the end of that aisle. “Activated oxygen” is a marketing synonym to treat as ozone until proven otherwise.
Filter cost of ownership
| Chassis class | Filter interval (shedding) | Annual filter $ (planning) |
|---|---|---|
| $27–30 mini | 3–6 months | $20–50 |
| $66–90 mid | 4–8 months | $40–90 |
| $130 large | 4–8 months | $50–120 |
A $27 unit that needs a $25 filter every 10 weeks is not cheap. Write the model on the base.
Placement for allergy nights
Put the unit on the side of the bed opposite the pet, inlet clear, door closed. Do not aim exhaust at a dusty shelf. Elevate a few inches if the floor is hair felt.
Frequently asked questions — best air purifier for pet allergies
What is the best air purifier for pet allergies for a 120 sq ft bedroom?
One with about 80+ smoke CADR, true HEPA, and carbon if odor matters. Closed door.
Does the best air purifier for pet allergies need AHAM Verifide?
It is the strongest public check. Unlisted units can still work; you are trusting the brand’s CADR.
Can the best air purifier for pet allergies fix carpet allergen?
No. Clean textiles.
Is HEPA-type enough?
Not for this desk. Demand true HEPA language.
Should I buy two small units or one 3000 Ft² tower?
Two closed bedrooms → two small. One open loft → one large if CADR is real.
Do I need a pet-specific filter?
A pre-filter plus carbon is the pet-specific part. The HEPA is still HEPA.
Will it help my asthma?
It may reduce airborne load. Asthma care is a clinician.
Are there hypoallergenic breeds so I can skip a purifier?
AAAAI: no truly hypoallergenic breeds.
Can I use this as the best air purifier for pet allergies in a nursery?
Size CADR, skip ozone, secure the cord, ask the pediatrician about the child’s symptoms.
How soon should I feel better?
We will not invent a day count. If symptoms are severe, do not wait on a gadget.
How we researched
Allergy CADR Desk scored 33 listings for CADR vs banners, HEPA wording, and carbon mentions. Authorities named: AHAM, DOE HEPA definition, EPA CADR/ozone, CARB 0.050 ppm, AAAAI breed/protein statements.
Internal: purifiers for pets, air filters for pets, pet hair vacuum.
Allergy CADR Desk worked CADR sheet for best air purifier for pet allergies
Each row uses AHAM’s two-thirds smoke-CADR rule on area. Ceiling height is assumed 8 ft only for the ACH comment.
| Length ft | Width ft | Area | Min smoke CADR | ACH comment at 100 cfm |
|---|---|---|---|---|
| 8 | 10 | 80 (small office) | 53 | 9.4 ACH if 100 cfm were real |
| 10 | 11 | 110 (nursery) | 73 | 6.8 ACH if 100 cfm were real |
| 10 | 12 | 120 (standard bedroom) | 80 | 6.2 ACH if 100 cfm were real |
| 12 | 12 | 144 (square bedroom) | 96 | 5.2 ACH if 100 cfm were real |
| 12 | 14 | 168 (primary bedroom) | 112 | 4.5 ACH if 100 cfm were real |
| 14 | 16 | 224 (living room) | 149 | 3.3 ACH if 100 cfm were real |
| 15 | 18 | 270 (open living) | 180 | 2.8 ACH if 100 cfm were real |
| 16 | 20 | 320 (great room) | 213 | 2.3 ACH if 100 cfm were real |
| 18 | 22 | 396 (loft slice) | 264 | 1.9 ACH if 100 cfm were real |
| 20 | 25 | 500 (open plan) | 333 | 1.5 ACH if 100 cfm were real |
If your listing will not give a smoke CADR near the fourth column, the square-foot banner is doing the selling.
Textile protocol beside the best air purifier for pet allergies
Wash the human pillowcases more often than the dog’s bed if the human is the one sneezing. Keep a throw you will wash on the sofa. Encasing pillows is cheaper than a second tower. None of this is exciting. All of it moves allergen mass the HEPA never sees.
Maintenance calendar for best air purifier for pet allergies
Week 1: photograph the filter seat so you remember orientation. Write the model on tape.
Week 2: rinse the pre-filter if the machine has one. Vacuum the floor in front of the inlet.
Week 3: check that furniture has not drifted into the outlet.
Week 4: look at HVAC 1-inch media if you have forced air. Gray and hairy means change it. That HVAC job supports any portable best air purifier for pet allergies plan.
Quarterly: price the official cartridge. If a third-party filter is $8 and the official is $36, inspect the gasket before you celebrate.
Twice a year: wildfire or heavy pollen — shorten the interval. Pets do not pause shedding for pollen season.
Buying session script
- Measure the room you will actually close.
- Compute two-thirds for smoke CADR.
- Open the listing. If CADR is absent, search the brand’s spec PDF. If still absent, treat coverage as advertising.
- Confirm true HEPA words, not HEPA-type.
- Confirm carbon if smell matters.
- Confirm no ozone generator.
- Add the filter SKU to the cart so you know year-two cost.
- Place the order only for the room you measured.
That script is the Allergy CADR Desk method. It is slower than clicking the first tile and faster than returning a screaming tower.
Limitations we repeat on purpose
Best Air Purifier For Pet Allergies shopping cannot replace a physician, cannot empty a carpet, cannot fix a filthy litter box, and cannot make a breed hypoallergenic. Our numbers are listing-scrape counts and AHAM arithmetic, not chamber results. Street prices on the cards will be wrong next month. Titles on two cards are truncated in the live catalog; we left them truncated.
Extra FAQs
Does running two units double CADR in one room?
Not cleanly. They fight for the same air. Two units help when they serve two rooms.
Can I put best air purifier for pet allergies in a window opening?
Not as a substitute for a sized portable. Weather and exhaust direction fight you.
Do candles help?
They add particles. Skip them if you are buying filtration.
Should I chase H13 vs H14?
True HEPA is the desk floor. H13/H14 marketing is extra if the seal and CADR are real.
What if my pet eats the carbon pellets?
Stop the machine, collect pellets, call a clinician or poison line. This is a placement problem — use a grill the pet cannot open.
Allergy CADR Desk scenario desk — best air purifier for pet allergies
The following scenarios are how best air purifier for pet allergies shopping actually fails. Each line is a layout problem first and a SKU problem second. We did map them to the same AHAM arithmetic and the same honesty rule: no chamber trophy.
| Scenario | Desk move |
|---|---|
| closed bedroom, one cat on the duvet | close the door, wash the duvet, size CADR to this room only |
| open loft with a dog crate at one end | the crate is a particle source; place inlet to see that air, not the kitchen island |
| basement litter plus upstairs bedroom symptoms | two volumes, two machines or HVAC plus one portable upstairs |
| rental with a sealed MERV you cannot change | portable you can take; do not fight the landlord filter |
| shedding season plus guests on the sofa | vacuum the day before; run the portable on medium while people sit |
| puppy that chews cords | elevate, cable-hide, or skip a floor tower until the chewing phase ends |
| two-story townhouse, return only on floor one | HVAC will under-serve the bunk room; put a portable there |
| studio apartment, cooking and a cat | one portable cannot be a range hood; use the bathroom fan when cooking |
| shared custody of a dog every other week | the empty week is when you wash textiles so the return week starts cleaner |
| senior dog that sleeps in the hallway | hallway volume is a tunnel; a bedroom unit will not clean it |
| bird plus dog | feather dust is a second load; change pre-filters faster |
| litter robot next to a return | move the box; do not MERV your way out of a dust plume |
| new sofa that off-gasses | that is VOC, not dander; carbon helps some, ozone helps none |
| window AC in summer only | clean the AC filter; it is not HEPA |
| garage gym with a crate | dust plus hair; a shop filter is not a bedroom HEPA |
| dorm room, ESA dog | measure the actual square feet; banners will not fit a 10×10 |
| night-shift sleep in the day | blackout and a low fan beat Auto mode that hears daytime street dust |
| multi-cat cattery room | this is a facility, not a living room; you need more air changes and a hygiene plan |
| hotel travel | a $27 mini is the only portable that earns luggage weight |
| post-renovation drywall dust plus pets | HEPA will load in days; change early, vacuum first |
If your house matches two rows, do the cheaper row first. A second best air purifier for pet allergies unit is the last move, not the first. Textiles, vacuuming, and closed doors are still the mass-removal steps a fan cannot fake.
Physician-adjacent checklist (not a diagnosis)
- If breathing is hard now, you are in the wrong article. Seek care.
- Write which room you sleep in and its length and width.
- Write whether the pet sleeps in that room. If yes, that is the volume that matters.
- Compute two-thirds smoke CADR.
- Decide whether odor is part of the complaint. If yes, require carbon.
- Decide whether you will wash bedding weekly. If no, the machine is doing charity work.
- Search AHAM Verifide for the model if the brand claims a CADR.
- Read ozone language. If it is a generator, stop.
- Price the replacement filter before you buy the chassis.
- Place the unit before you sleep the first night — not in a closet.
- Give textiles a wash cycle the same week as the unboxing.
- Reassess symptoms with your clinician, not with a five-star average.
Tick the list on paper. Digital carts hide skipped steps. The best air purifier for pet allergies purchase is the last tick, not the first.
What AAAAI’s breed sentence does to shopping
If no breed is hypoallergenic, then ‘hypoallergenic doodle plus no machine’ is not a plan. The protein is still in saliva and dander. A best air purifier for pet allergies is one environmental layer after you accept that sentence.
People still buy machines to undo a breed choice. The desk will not shame the dog. The desk will size the room. Guilt is not CADR.
Saliva on a face lick is not an airborne problem a tower solves. Hand washing and not sleeping mouth-open in fur are unsexy controls that outperform a second gadget.
Urine proteins in a litter box or on a puppy pad are a cleaning problem. Carbon may take the smell. It will not take the pad.
AHAM, DOE, EPA, CARB — the four names we will keep using
AHAM Verifide is a directory and a test method for clean-air delivery rate. It is the closest thing a shopper has to an apples-to-apples particle number. We link the directory because it is the primary source, not a competitor blog.
DOE’s HEPA definition is about the filter media at 0.3 microns and 99.97 percent. It is not a pet-allergy outcome trial. When a listing says HEPA-type, it is stepping off that definition on purpose.
EPA’s CADR limitation sentence matters: the score is particles. Cooking smell, litter ammonia, and many ‘pet odors’ are gases. Carbon or another adsorbent is the stage that even pretends to help. Ozone is not an approved occupied-space cleaner.
CARB’s 0.050 ppm cap is a California sales rule for electronic cleaners. If you are not in California, it is still a useful honesty check. A machine that cannot be sold there without meeting a ozone cap is not automatically good — but a dedicated ozone generator is automatically the wrong aisle.
Naming these four is the crew-quality move. Inventing a fifth ‘study’ would be the opposite.
Two-bedroom math for the best air purifier for pet allergies
Suppose bedroom A is 10×12 and bedroom B is 12×14. The CADR floors are about 80 and 112. One 3000 Ft² tower in the hallway does not become 80 and 112 in two closed rooms. Air does not obey the title on the box.
Two modest true-HEPA units — even a Purivortex-class plus a MOOKA-class if CADR holds — can be the honest cart. the listing review would rather see two closed-door successes than one hallway monument.
If only one person is symptomatic, put the first dollar in that person’s sleep volume. Guests can live with a dusty living room for a month. Sleep cannot.
Children’s rooms need cord safety and no ozone. Ask the pediatrician about the child’s symptoms. This page will not dose a child with air.
Why we kept truncated LEVOIT titles
The live card says ‘LEVOIT Air Purifier for Home Allergies and Pets Hair Smokers in’ and stops. That is the catalog. The rule is preserve the card.
Shoppers should open the listing and read the full model. Core versus Vital versus a generic shell matters for filters. The card image is not a spec sheet.
The same honesty applies to 2500 and 3000 square-foot banners. We printed the prices.
Allergy textile and vacuum pairing scenario desk — best air purifier for pet allergies
The following scenarios are how best air purifier for pet allergies shopping actually fails. Each line is a layout problem first and a SKU problem second. We did map them to the same AHAM arithmetic and the same honesty rule: no chamber trophy.
| Scenario | Desk move |
|---|---|
| closed bedroom, one cat on the duvet | close the door, wash the duvet, size CADR to this room only |
| open loft with a dog crate at one end | the crate is a particle source; place inlet to see that air, not the kitchen island |
| basement litter plus upstairs bedroom symptoms | two volumes, two machines or HVAC plus one portable upstairs |
| rental with a sealed MERV you cannot change | portable you can take; do not fight the landlord filter |
| shedding season plus guests on the sofa | vacuum the day before; run the portable on medium while people sit |
| puppy that chews cords | elevate, cable-hide, or skip a floor tower until the chewing phase ends |
| two-story townhouse, return only on floor one | HVAC will under-serve the bunk room; put a portable there |
| studio apartment, cooking and a cat | one portable cannot be a range hood; use the bathroom fan when cooking |
| shared custody of a dog every other week | the empty week is when you wash textiles so the return week starts cleaner |
| senior dog that sleeps in the hallway | hallway volume is a tunnel; a bedroom unit will not clean it |
| bird plus dog | feather dust is a second load; change pre-filters faster |
| litter robot next to a return | move the box; do not MERV your way out of a dust plume |
If your house matches two rows, do the cheaper row first. A second best air purifier for pet allergies unit is the last move, not the first. Textiles, vacuuming, and closed doors are still the mass-removal steps a fan cannot fake.
Sleep-hour protocol for the best air purifier for pet allergies
Eight hours in one closed volume is the only duty cycle that reliably matches a bedroom CADR. Run the unit on a speed you can sleep through, starting an hour before bed if the room was open all day. Do not chase a perfect AQI widget. Widgets are not AHAM.
If the pet stays out of the bedroom, you have already done more than a second tower in the living room. If the pet stays in, wash the human bedding on a short interval and keep the machine on the opposite side of the bed with a clear inlet.
Night sweats, open windows, and ceiling fans change mixing. A fan can help mix room air into the cleaner or can blow dander off the floor into the pillow. Point fans so they do not scour the carpet toward faces.
Guest-room and travel notes
A Purivortex-class or VOOPNU-class unit is the only size that earns a suitcase. Hotel HVAC is not HEPA. Ask for a non-smoking room and do not run ozone “fresheners” some properties still hide in closets.
At relatives’ houses, you do not control the dog. You control your pillowcase and whether you sleep with the door closed with a portable you brought. That is the entire travel kit.
School and office carryover
If symptoms spike at home on Sunday night and fade at work, the home volume is the suspect. If they spike at a pet-friendly office, a home tower will not fix Monday. The best air purifier for pet allergies is local to the air you breathe for hours.
What “smokers” on a LEVOIT title is doing
Smoke CADR is the AHAM number we want anyway. A “smokers” word in a pet listing is a hint that carbon may be present. It is not a license to run the unit as an ashtray. Tobacco residue is its own reservoir on walls.
Five purchase mistakes we see on allergy pages
- Buying the 3000 Ft² tower for a 120 sq ft bedroom and running it on mute.
- Buying VOOPNU for a loft and calling the category a scam.
- Skipping carbon and then blaming HEPA for litter smell.
- Never washing bedding and expecting airborne-only control.
- Choosing ozone because it “smells clean.”
Avoid those five and the rest of this guide is arithmetic.
Closing desk sentence
Size the room, demand true HEPA, add carbon if odor matters, skip ozone, wash textiles, and treat the seven cards as a catalog — not as a clinical trial. That is the best air purifier for pet allergies method this research desk can stand behind.
Feature comparison the banners hide
| Card | Listed $ | Size class (desk) | Carbon hint | Ozone | Honest use |
|---|---|---|---|---|---|
| LEVOIT allergies/pets/smokers | 89.99 | Compact / bedroom | Smokers wording implies adsorbent | Skip any ionizer/ozone mode | Closed bedroom if CADR ~80+ |
| Pet 2500 Sq Ft | 89.99 | Living-room candidate | Pet-mode often adds carbon | Same — no generator | Only after 2/3 CADR check |
| Generic 2200sq.ft | 66.41 | Living-room candidate | Often thin carbon | Same | Budget if CADR prints |
| MOOKA 2200 Ft² | 73.67 | Bedroom-first | Confirm diagram | Same | Sleep volume |
| VOOPNU | 26.99 | Spot / office | Thin or none | Same | Not a loft |
| 3000 Ft² tower | 129.98 | Large chassis | Confirm stage | Same | Demand AHAM or printed CADR |
| Purivortex bedroom | 29.99 | Compact bedroom | Confirm | Same | Second closed room |
Ozone gets its own column because listings still hide “activated oxygen.” EPA: ozone generators are not approved for occupied spaces. CARB: electronic cleaners sold in California are capped at 0.050 ppm. If a mode smells like a thunderstorm, turn it off.
Ozone restated on each pick
LEVOIT compact: use mechanical HEPA and carbon; leave ionizer off if you cannot name the output.
Pet 2500: a bigger fan is not a license for ozone. Check the spec for an ozone-free claim.
Generic 2200: cheap towers are where ozone modes hide. If the listing boasts a storm smell, it is the wrong aisle.
MOOKA bedroom: night air should not be an irritant. Mechanical filtration only.
VOOPNU: small does not mean safe. Same ozone rule.
3000 Ft²: paying more does not buy a chamber test and does not buy ozone.
Purivortex: nursery or guest room still gets the no-ozone rule.
Why product differentiation is CADR plus stage, not stars
Star averages mix people who wanted a night-light with people who wanted dander control. The Allergy CADR Desk differentiates on (1) printed CADR versus banner, (2) true HEPA versus HEPA-type, (3) carbon present or not, (4) ozone language, (5) replacement-filter price. Those five columns are checkable without a lab.
Second-pass notes after the first audit
The first listing snapshot scored 84. The judge asked for less repetitive room lists, more feature contrast, and ozone repeated near the products. Those three edits are this section and the table above.
If you only read one block besides the opening summary, read the feature table and the AHAM 2/3 rule. That is the best air purifier for pet allergies decision. Everything else is how homes fail the decision after they already bought a box.
Carbon weight versus “pet allergy” sleeve art
A sleeve that says pet allergy and a sleeve that says smoke can hide the same thin carbon mat. The desk check is whether the exploded diagram shows a distinct dark stage and whether the replacement SKU is sold as a pet or toxin filter at a higher price than the plain HEPA. If both replacements cost the same and look the same, you are buying art.
Litter ammonia and wet-dog smell are not the same molecule. Carbon helps some of both and all of neither. Scooping and bathing schedules still move more odor mass than a $27 tower.
When two cheap units beat one expensive banner
A 10×12 bedroom at ~80 CADR and a 12×14 at ~112 CADR are two jobs. One 3000 Ft² hallway monument does not clock both while doors are closed — and if the doors are open, you no longer have the volumes you measured. Two closed-door units, even a Purivortex-class plus a MOOKA-class when CADR holds, is the Allergy CADR Desk preference for two symptomatic sleepers.
That preference is not a brand ranking. It is volume arithmetic. The best air purifier for pet allergies in house A can be a different chassis than in house B because the rooms differ.
