What air purifier filters really cost per year

The short answer

Budget about $45 to $140 a year for replacement filters on a mainstream HEPA purifier — per machine. Across the three machines we recommend, one fill of the filter runs 20% to 29% of the purchase price, and across all seven models priced below the interval between fills ranges from 6 to 15 months depending on the model and your air. The trap this page exists to flag: a cheap purifier with a hungry filter can cost as much to own over three years as a premium machine — the arithmetic is below, from the manufacturers’ own numbers.

The numbers, model by model

Every price here — filters and machines alike — was read directly from the manufacturer’s own pages on August 24, 2026; prices move, so treat these as a dated snapshot and check the linked source pages in the list at the bottom before buying. Annualized cost spreads across the manufacturer’s own stated replacement range.

Model	Filter price	Stated interval	Cost per year
Levoit EverestAir-P (our premium pick)	$99.99	12–15 months	$80–$100
Coway Airmega Mighty2 (AP-1512N) (our all-around pick)	$69.99	6–12 months	$70–$140
Levoit Vital 200S-P (our budget pick)	$49.99 (base filter)	6–12 months	$50–$100
Coway Airmega 400/400S	$129.00 (two-filter set)	12 months	$129
Levoit Core 300-P	$29.99	6–8 months	$45–$60
Winix 5500-2	$84.99 list ($59.49 promo at read time)	12 months	$59–$85
Blueair Blue Pure 211+	$69.99	~6 months, usage-dependent	~$140

Two footnotes that change real budgets. Levoit sells at least four filter variants for the Vital 200S-P — the $49.99 base plus specialty carbon versions such as the $59.99 Toxin Absorber — so what a household actually pays depends on which box they grab. And the Winix figure’s lower end is an active promotion against an $84.99 list price; sale prices on filters are common and unstable, which is an argument for checking the filter page before you buy the machine.

Why a cheap purifier can cost more

Run the three-year math on two machines from the table, each at the faster end of its own manufacturer-stated range. The Levoit Vital 200S-P — $169.99 on sale as we write this, $189.99 list — replacing its $49.99 filter every 6 months spends $299.94 on filters in three years. The $499.99 Levoit EverestAir-P replacing its $99.99 filter every 12 months spends $299.97. Three cents apart — on machines $330 apart at the register. The premium machine’s longer interval fully absorbs its pricier filter; the budget machine’s sticker price is only the down payment. This isn’t an argument that expensive machines always win; it’s an argument that the filter line belongs in the purchase decision, and almost no listing shows it to you.

Electricity is the other quiet line. ENERGY STAR certifies purifiers on cleaning-per-watt (a ratio called integrated energy factor), not a flat wattage — so two machines with the same coverage can draw very different power. Wirecutter’s instrumented testing puts real numbers on the spread: the Coway Airmega Mighty2 measured 48.4 watts on its highest speed and 5–20 watts on the three lower speeds, while one Honeywell model they dismissed measured 33 to 117 watts across its range — their words: an absolute power hog. Oversized machines running on low win twice: quieter, and cheaper per hour.

The interval question nobody settles

How often filters really need changing is the least settled number in the category — but keep two different filter worlds straight. For furnace and HVAC filters, the EPA’s guidance is short: manufacturers typically recommend replacement every 60 to 90 days (the line sits in the Guide’s furnace-filter Q&A). Portable purifiers are a different animal — their makers state 6 to 15 months for the combined cartridges priced above. The genuinely open question is whether even those longer intervals are conservative: Wirecutter ran a Coway Airmega Mighty continuously for two years — double its stated interval — and measured, with a professional particle counter, virtually no performance drop against a fresh filter. The practical read: treat the manufacturer interval as a default, let heavy loads (wildfire smoke, renovation dust, shedding pets) shorten it, and let a visibly clean filter in light service run long.

One more thing worth knowing about the replacement light: on the one model where testing confirmed the mechanism — Blueair’s Blue Pure 211i Max, per Wirecutter — the indicator tracks actual usage rather than a simple timer, so light use stretches the cycle honestly. Whether your machine’s light is a timer or a sensor generally isn’t documented; the filter itself is the evidence that matters.

Where the savings hide

• Washable pre-filters are free maintenance: the EverestAir-P’s pre-filter rinses clean every 2–4 weeks and costs nothing over the machine’s life; keeping any pre-filter clean also protects the expensive HEPA stage behind it — Wirecutter’s standing advice is a monthly rinse or vacuum.
• Combined cartridges simplify, single-purpose parts save: most models here bundle HEPA and carbon in one SKU, so you replace both even if only one is spent. Blueair sells the Blue Pure 211+’s pre-filter separately for $8.99 — a cheap refresh between main-filter changes.
• Washable carbon exists, with an asterisk: Winix’s carbon stage is explicitly washable, though Winix still sells it in the annual replacement set and notes performance may decline with each wash.

Third-party filters: the honest picture

Aftermarket filters cost less, and the question is what you give up. The neutral reference point: AHAM Verifide — the same body behind CADR — now runs an independent certification program for replacement filters: certified ones are lab-tested to confirm they match the original filter’s performance, and AHAM’s warning is that poorly performing aftermarket filters can reduce airflow and particle capture. The manufacturers’ own position is predictably harsher — Coway’s marketing calls third-party filters reverse-engineered approximations, and its published warranty excludes damage tied to non-genuine parts, which is the concrete, checkable consequence. We found no equivalent official statement from Levoit — its support pages sit behind a login. The defensible middle: if you go aftermarket, prefer AHAM-certified replacements, and know your warranty math — on a $170 machine, two years of half-price filters can be worth more than the coverage.

Filter math in hand, the machines are already vetted: The 3 Best Air Purifiers (2026) — the running costs above belong to those three picks, so the total-cost comparison is one page away.

Related reading

• How big an air purifier do you need?
• HEPA vs. ionizers: which actually cleans your air?
• Air purifiers for wildfire smoke: what actually works

Sources

• Levoit — EverestAir-P replacement filter ($99.99, 12–15 months, washable pre-filter)
• Coway — Airmega Mighty2 (AP-1512N) filter ($69.99, 6–12 months)
• Levoit — Vital 200S replacement filter ($49.99 base filter, 6–12 months)
• Levoit — Vital 200S-P Toxin Absorber filter ($59.99 variant (filter-flavor spread))
• Coway — Airmega 400 Max2 filter set ($129.00 two-filter set, 12 months)
• Levoit — Core 300 replacement filter ($29.99, 6–8 months)
• Winix — Filter H (5500-2) ($84.99 list / $59.49 promo, annual set, washable carbon note)
• Blueair — Blue Pure 211+ particle + carbon filter ($69.99, ~6-month indicator)
• Blueair — Blue Pure 211+ pre-filter ($8.99 fabric pre-filter)
• EPA — Guide to Air Cleaners in the Home (60–90-day replacement line (the reported tension))
• ENERGY STAR — Room Air Cleaners key product criteria (integrated energy factor thresholds)
• Wirecutter — The Best Air Purifier (two-year filter test, measured wattages, 211i Max indicator behavior, pre-filter care)
• AHAM Verifide — Air Filtration Standards (replacement-filter certification program)
• Coway — warranty policy (non-genuine parts exclusion)
• Coway — brand filters vs. third-party filters (Coway’s stated position on aftermarket filters)
• Levoit — EverestAir-P purifier (unit price $499.99, rated wattage)
• Levoit — Vital 200S-P purifier (unit price $169.99 sale / $189.99 list, read 2026-08-24)

Last verified 2026-08-24. No affiliate links on this page — how and why is on How We Pick.