Air Purifiers / Shark NeverChange Air Purifier MAX (HP302) vs Medify Air MA-40 (V4.0)
Shark NeverChange Air Purifier MAX (HP302) vs Medify Air MA-40 (V4.0)
Shark NeverChange Air Purifier MAX (HP302)
Buys you out of filter costs for five years, at the price of never knowing its CADR.
Wins overall by 1.5 points
Quick Verdict
A 1.5-point gap makes the Shark NeverChange Air Purifier MAX (HP302) the straightforward choice here. Buys you out of filter costs for five years, at the price of never knowing its CADR.
The Shark NeverChange Air Purifier MAX (HP302) and Medify Air MA-40 (V4.0) are both closely matched air Purifier models, and the Medify Air MA-40 (V4.0) is $150 cheaper than the Shark NeverChange Air Purifier MAX (HP302) ($249.99 vs $399.99). On Sensor Quality, the Shark NeverChange Air Purifier MAX (HP302) leads (6.0 vs 1.0/10) — whether there is a real laser particle sensor resolving PM1/PM2.5/PM10 with numeric output, a vaguer 'air quality' index, an inference from a cheap VOC element, or no sensor and therefore no auto mode at all. On Running Cost, the Shark NeverChange Air Purifier MAX (HP302) leads (6.5 vs 3.5/10) — filters, pre-filters, cartridges and subscriptions over three years, against the purchase price. Several units here cost more to feed than to buy; a high score means cheap, long-lived, non-proprietary consumables. On Freedom From Ozone & Air Chemistry, the Shark NeverChange Air Purifier MAX (HP302) leads (9.0 vs 7.0/10) — whether the unit adds an ioniser, plasma, UV or photocatalytic stage to the airstream, whether that stage can be switched off, and how CARB classifies the device — 'Mechanical' means filtration only, 'Electronic' means capable of generating ozone and certified only as being at or below 0.050 ppm. Overall, the Shark NeverChange Air Purifier MAX (HP302) scores 6.3/10 across our 8 scoring categories versus 4.8/10 for the Medify Air MA-40 (V4.0). Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Shark NeverChange Air Purifier MAX (HP302) | Medify Air MA-40 (V4.0) |
|---|---|---|
| Price | $399.99 | $249.99 |
| Release Year | 2023 | 2019 |
| AHAM Verifide CADR (Smoke / Dust / Pollen) (CFM) | Not published, and not AHAM Verifide. Shark does not appear in the AHAM Verifide directory at all in August 2026, and publishes no CADR for smoke, dust or pollen. The only performance number on the page is "trapping 99.98% of large, small, and micro-sized particles", which is a capture-efficiency claim and says nothing about airflow. | Medify publishes smoke 239 / dust 231 / pollen 240 / PM2.5 235 CFM itself, footnoted "Smoke CADR when operating at highest fan speed". Medify's own listings display an "AHAM Verified" badge on every product — but a query of the AHAM Verifide directory in August 2026 returns the brand "Medify Air" in the brand index with ZERO currently certified models. Treat these as manufacturer figures until a directory entry appears. |
| AHAM Verifide Room Size (4.8 ACH) (ft²) | Not listed in the AHAM Verifide directory (August 2026) | No current AHAM Verifide listing (August 2026), despite the "AHAM Verified" badge on medifyair.com. Medify's own 5-ACH figure is 358.5 ft² and its 4-ACH figure is 448 ft². |
| Coverage Claim & Its Air-Change Basis | "Up to 1,400 sq. ft." with no air-change basis stated anywhere on Shark's own page — no ACH figure, no room-volume assumption, no CADR to derive one from. Retail listings variously quote 1,300 and 1,200–1,500 sq ft for the same model. This is the least checkable coverage claim in the file. | Medify's own table: 1,793 ft² at 1 ACH, 896 ft² at 2 ACH, 448 ft² at 4 ACH, 358.5 ft² at 5 ACH. The headline everywhere — site, packaging, Amazon title — is the 2-ACH number, "896 sq ft in 30 minutes". Two air changes an hour is roughly half what smoke or allergen control needs. |
| Filter Grade (True HEPA / HEPA-Type / H13) | "True HEPA Multi-Filter" — a single tall cartridge combining pre-filtration and HEPA media, sold on longevity rather than grade. Shark quotes 99.98% capture but no H-class rating and no EN 1822 or IEST reference. | Medify markets "True HEPA H13" (and H14 on some SKUs). The footnote on every page reads "Tested by Intertek Lab for HEPA filter material" — the H13 grade is a claim about the media, not a whole-unit sealed-system rating. Three stages: pre-filter, H13 media, pelletised activated carbon. |
| Pre-Filter (Washable?) | Integrated into the 5-year multi-filter — nothing separate to wash, and nothing separate to buy | Integrated into the single replaceable cylinder — not separately washable |
| Filter Cost per Year | About $80/yr in practice, all of it optional: the Odor Neutralizer Cartridge is $19.99 on a roughly 3-month cycle, and it is a fragrance cartridge you can leave out entirely. The main filter is claimed at up to 5 years, so amortised it is small. The caveat: independent analysis of Shark's own test conditions (cleanairadviser.com, 2026) reports the 5-year figure is measured in a 300 ft² room, 12 hours a day at maximum fan speed, to an endpoint that allows clean-air delivery to fall by 50% — so the filter is "still working" at half the airflow it started with. | $119.98–$179.97/yr, and Medify's own site cannot agree with itself: the MA-40 filter page sets the subscription cadence at 120 days, the purifier page sets it at 180 days, and the body copy says the filter lasts "up to 3,000 hours or 4-5 months". At $59.99 a filter that is two to three filters a year. The subscription discounts the first filter 40% ($35.99) and later ones 10% ($53.99). |
| Ioniser / UV / PCO & CARB Classification | None. No ioniser, no UV, no PCO. CARB-certified and classified MECHANICAL (Shark HP302, EO G-23-167, notified 2023-06-26). The Odor Neutralizer cartridge is a fragrance emitter, not an oxidiser — but it is still adding VOCs to the air you are cleaning. | The standard MA-40 has an optional ioniser (Medify's own controls list reads "Ionizer (Optional)") and Medify describes the unit as ozone-free. CARB history is instructive: the original MA-40 (EO G-21-461, 2021) and the MA-40UV are certified as ELECTRONIC devices, while MA-40-V3.0 (G-23-267) and the current MA-40-V4.0 (G-25-237, 2025-09-10) are certified as MECHANICAL. Buy the current V4.0 HEPA SKU, not a UV or ioniser variant. |
| Noise, Lowest to Highest Setting (dB) | Not published by Shark at either end. No decibel figure appears on the product page. | Medify publishes only the sleep-mode figure, "as low as 40.5 dBA". No figure is published for the top speed. 40.5 dBA is by far the loudest quiet-setting in this file — the Levoit Core 300S-P is 22 dB and the Blueair 23 dB. |
| Air Quality Sensor | "CleanSense IQ" air-quality monitoring driving an auto mode. Shark does not state the sensing technology or which pollutants it resolves. | None. The MA-40's own controls list is "Preset Timers, 3 Fan Speeds, Sleep Mode, Filter Indicator, Touch Controls, Child Lock, Ionizer (Optional)" — there is no particle sensor and therefore no auto mode at any price. |
| Smart Features & Offline Operation | None. No Wi-Fi, no app, no account. Note that the infrared remote is listed as a $16.99 replacement part — losing it costs real money because there is no phone fallback. | None. No Wi-Fi, no app, no account. Fully offline. |
| Power Draw & Annual Energy | 54W nominal, 86.2W peak (Shark published) | 68W (Medify published); Integrated Energy Factor 3.6 |
| Warranty Terms & Conditions | 2-year limited warranty | Limited Lifetime Warranty with no filter-subscription requirement — unusually generous, and the reason warrantyMonths is recorded as 0 rather than a month count. Plus a 30-day home trial. |
| Warranty | 24 months | 0 months |
| Colors | White, Dove | White, Black |
Category Scores
Coverage-Claim Honesty
The Medify Air MA-40 (V4.0) leads clearly here, 3.5 against 3.0 — a 0.5-point margin on the trap dimension for this category. Almost every brand derives its headline square footage from ONE air change per hour, which does close to nothing for smoke, pollen or wildfire particulate — the useful standard is 4.8 air changes an hour, and it is typically a fifth of the number on the box. A high score means the manufacturer publishes the 4.8-ACH figure prominently and it survives comparison with the AHAM Verifide room size; a low score means a big number with no stated air-change basis, or no CADR at all to derive one from.. If that is what you are buying for, the Shark NeverChange Air Purifier MAX (HP302) does not close the gap elsewhere.
Verified Clean-Air Delivery
The Medify Air MA-40 (V4.0) leads clearly here, 6.0 against 5.0 — a 1.0-point margin on how much air the unit actually cleans per minute, weighted heavily toward AHAM Verifide smoke CADR over manufacturer-published figures. Self-reported CADR scores below Verifide CADR, and 'no CADR published at all' scores below both. If that is what you are buying for, the Shark NeverChange Air Purifier MAX (HP302) does not close the gap elsewhere.
Filtration Quality
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 8.0 against 7.5 — a 0.5-point margin on what the media is really rated at — sealed H13, True HEPA, HEPA-Type, EPA 12 or charged fabric — whether the whole machine is sealed so air cannot bypass the filter, and how much genuine activated carbon there is for odours and VOCs. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Running Cost
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 6.5 against 3.5 — a 3.0-point margin on filters, pre-filters, cartridges and subscriptions over three years, against the purchase price. Several units here cost more to feed than to buy; a high score means cheap, long-lived, non-proprietary consumables. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Quietness
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 5.5 against 4.0 — a 1.5-point margin on measured decibels at the lowest setting you would run overnight AND at the top speed you need in a smoke event — a purifier is only useful at a speed you can tolerate. Not publishing a figure at either end costs points. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Sensor Quality
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 6.0 against 1.0 — a 5.0-point margin on whether there is a real laser particle sensor resolving PM1/PM2.5/PM10 with numeric output, a vaguer 'air quality' index, an inference from a cheap VOC element, or no sensor and therefore no auto mode at all. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Freedom From Ozone & Air Chemistry
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 9.0 against 7.0 — a 2.0-point margin on whether the unit adds an ioniser, plasma, UV or photocatalytic stage to the airstream, whether that stage can be switched off, and how CARB classifies the device — 'Mechanical' means filtration only, 'Electronic' means capable of generating ozone and certified only as being at or below 0.050 ppm. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Controls & Independence
The Shark NeverChange Air Purifier MAX (HP302) leads clearly here, 7.0 against 6.0 — a 1.0-point margin on whether every mode works from the machine itself with no account or cloud, how good the auto mode is, filter-change access, and whether losing a remote or a login costs you function. If that is what you are buying for, the Medify Air MA-40 (V4.0) does not close the gap elsewhere.
Best For
Choose the Shark NeverChange Air Purifier MAX (HP302) if…
- • Sensor Quality matters most to you — the Shark NeverChange Air Purifier MAX (HP302) scores 6.0/10 here (whether there is a real laser particle sensor resolving PM1/PM2.5/PM10 with numeric output, a vaguer 'air quality' index, an inference from a cheap VOC element, or no sensor and therefore no auto mode at all).
- • Running Cost matters most to you — the Shark NeverChange Air Purifier MAX (HP302) scores 6.5/10 here (filters, pre-filters, cartridges and subscriptions over three years, against the purchase price. Several units here cost more to feed than to buy; a high score means cheap, long-lived, non-proprietary consumables).
- • Freedom From Ozone & Air Chemistry matters most to you — the Shark NeverChange Air Purifier MAX (HP302) scores 9.0/10 here (whether the unit adds an ioniser, plasma, UV or photocatalytic stage to the airstream, whether that stage can be switched off, and how CARB classifies the device — 'Mechanical' means filtration only, 'Electronic' means capable of generating ozone and certified only as being at or below 0.050 ppm).
- • Quietness matters most to you — the Shark NeverChange Air Purifier MAX (HP302) scores 5.5/10 here (measured decibels at the lowest setting you would run overnight AND at the top speed you need in a smoke event — a purifier is only useful at a speed you can tolerate. Not publishing a figure at either end costs points).
- • Your main use case is ioniser-free.
Choose the Medify Air MA-40 (V4.0) if…
- • Verified Clean-Air Delivery matters most to you — the Medify Air MA-40 (V4.0) scores 6.0/10 here (how much air the unit actually cleans per minute, weighted heavily toward AHAM Verifide smoke CADR over manufacturer-published figures. Self-reported CADR scores below Verifide CADR, and 'no CADR published at all' scores below both).
- • You want to spend less — it's $150 cheaper.
- • Your main use case is wildfire-smoke.
Pros & Cons
Shark NeverChange Air Purifier MAX (HP302)
Pros
- +A 5-year filter genuinely removes the annual $60–100 tax that defines this category
- +Purely mechanical and CARB Mechanical — no ioniser, no UV, nothing to remember to switch off
- +The odour cartridge is optional and removable, so you are not forced to perfume your air
- +CleanSense IQ auto mode with no account, no app and no cloud dependency
- +13.45 lb and 54W nominal for a 1,400 ft²-class tower
Cons
- −No CADR at all, and Shark is absent from the AHAM Verifide directory — the "1,400 sq. ft." has no published air-change basis
- −The 5-year filter claim is measured to an endpoint that permits a 50% fall in clean-air delivery, per independent analysis of Shark's own conditions
- −No decibel figures published at any speed
- −$399.99 list buys 435 verified CFM from Blueair or 253 from Winix; here it buys an unquantified airflow
- −The remote is the only controller and Shark sells it as a $16.99 replacement part — there is no app fallback
Medify Air MA-40 (V4.0)
Pros
- +239 CFM smoke CADR is real firepower for $250 and beats every unit here below $340
- +Limited lifetime warranty with no registration-plus-subscription strings, unlike Alen's Forever Guarantee
- +Pelletised carbon rather than carbon-coated mesh gives it more genuine odour capacity than most
- +Publishes its coverage at four different ACH values, so the honest number is at least findable
- +The current V4.0 is CARB-certified Mechanical — no ozone pathway on the standard HEPA SKU
Cons
- −Every Medify listing carries an "AHAM Verified" badge, yet the AHAM Verifide directory shows zero certified Medify Air models in August 2026
- −The famous "896 sq ft" is a 2-ACH figure; at the 4–5 ACH that actually controls smoke it is 358–448 ft²
- −H13 is footnoted as "tested by Intertek for HEPA filter material" — media grade, not a sealed-unit rating
- −Sleep mode is 40.5 dBA. That is audible-conversation territory and the top speed is not published at all
- −$59.99 filters on a 120–180 day cadence — Medify's own pages disagree — means $120–180 a year, near the price of a whole Levoit
- −No sensor of any kind, so no auto mode: you are the air-quality sensor
Shop by Need
FAQs
Is the Shark NeverChange Air Purifier MAX (HP302) or Medify Air MA-40 (V4.0) better overall?+
Based on our 8-category scoring, the Shark NeverChange Air Purifier MAX (HP302) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Sensor Quality, the Shark NeverChange Air Purifier MAX (HP302) or the Medify Air MA-40 (V4.0)?+
The Shark NeverChange Air Purifier MAX (HP302) scores higher on Sensor Quality (6.0/10 vs 1.0/10) — whether there is a real laser particle sensor resolving PM1/PM2.5/PM10 with numeric output, a vaguer 'air quality' index, an inference from a cheap VOC element, or no sensor and therefore no auto mode at all.
Which is better for Running Cost, the Shark NeverChange Air Purifier MAX (HP302) or the Medify Air MA-40 (V4.0)?+
The Shark NeverChange Air Purifier MAX (HP302) scores higher on Running Cost (6.5/10 vs 3.5/10) — filters, pre-filters, cartridges and subscriptions over three years, against the purchase price. Several units here cost more to feed than to buy; a high score means cheap, long-lived, non-proprietary consumables.
Which is better for Freedom From Ozone & Air Chemistry, the Shark NeverChange Air Purifier MAX (HP302) or the Medify Air MA-40 (V4.0)?+
The Shark NeverChange Air Purifier MAX (HP302) scores higher on Freedom From Ozone & Air Chemistry (9.0/10 vs 7.0/10) — whether the unit adds an ioniser, plasma, UV or photocatalytic stage to the airstream, whether that stage can be switched off, and how CARB classifies the device — 'Mechanical' means filtration only, 'Electronic' means capable of generating ozone and certified only as being at or below 0.050 ppm.
Which is better for Quietness, the Shark NeverChange Air Purifier MAX (HP302) or the Medify Air MA-40 (V4.0)?+
The Shark NeverChange Air Purifier MAX (HP302) scores higher on Quietness (5.5/10 vs 4.0/10) — measured decibels at the lowest setting you would run overnight AND at the top speed you need in a smoke event — a purifier is only useful at a speed you can tolerate. Not publishing a figure at either end costs points.
Is the Shark NeverChange Air Purifier MAX (HP302) worth the price difference over the Medify Air MA-40 (V4.0)?+
The Medify Air MA-40 (V4.0) is the cheaper option at $249.99 versus $399.99. Whether the pricier model is "worth it" depends on how much you value its lead in Sensor Quality.
Which is better suited to my use case?+
The Shark NeverChange Air Purifier MAX (HP302) is the better fit if you mainly care about ioniser-free. The Medify Air MA-40 (V4.0) is the better fit for wildfire-smoke.
What's the warranty on the Shark NeverChange Air Purifier MAX (HP302) vs the Medify Air MA-40 (V4.0)?+
The Shark NeverChange Air Purifier MAX (HP302) ships with a 24-month warranty; the Medify Air MA-40 (V4.0) ships with a 0-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Coway Airmega AP-1512HH Mighty — $239.99
Premium Option
Dyson Purifier Cool Gen1 TP10 — $479.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.