Compare 25 machines by room fit, clean-air delivery, electricity, replacement filters, and estimated ownership cost.
No paid ranking · no fake review scores · planning estimates are labeled
Box-front room claims are hard to compare. Start with room volume and target air changes, then add power and replacement filters.
For 300 ft² × 8 ft at 5 air changes per hour.
Choose up to three finalists. Every product value is still a planning input pending manufacturer, AHAM, and ENERGY STAR verification.
Prototype data: Prices, wattage, filter costs, noise, and CADR are planning inputs—not live offers or verified current specifications. Last reviewed July 2026.
Medium rooms with widely sold filters
5.0 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $80 every 12 months.
Wall-mount option and customized filters
5.0 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $100 every 12 months.
Medium rooms and optional stronger filtration
5.6 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $70 every 6 months.
Compact footprint and frequent-filter households
5.8 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $60 every 4 months.
Medium rooms with app controls
5.8 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $70 every 12 months.
Medium-room value shoppers
5.8 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $60 every 12 months.
Strong value with washable carbon screen
5.8 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $50 every 12 months.
Balanced value for bedrooms and living rooms
5.8 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $60 every 12 months.
App-connected medium-room use
6.0 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $60 every 12 months.
Bedrooms with filter-style choices
6.1 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $90 every 12 months.
Low-power medium-room cleaning
6.3 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $60 every 9 months.
No-frills airflow and dual filters
6.6 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $70 every 12 months.
Large spaces and multi-filter airflow
7.5 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $100 every 12 months.
Large rooms where airflow matters most
7.5 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $100 every 12 months.
Premium sealed filtration and gas media
7.5 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $250 every 24 months.
Simple controls and large-room airflow
8.4 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $90 every 12 months.
Premium large-room and quiet operation
8.7 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $140 every 12 months.
Heavy carbon media and long filter interval
10.0 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $290 every 60 months.
Large open rooms with low energy use
10.3 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $70 every 9 months.
Large rooms and faster smoke cleanup
10.3 ACH in your roomPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $110 every 12 months.
Quiet small-room operation
Undersized · 3.8 ACHPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $35 every 9 months.
Small bedrooms, nurseries, and offices
Undersized · 3.5 ACHPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $50 every 8 months.
Low purchase price for a small room
Undersized · 2.5 ACHPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $35 every 8 months.
Small rooms and easy retail filter access
Undersized · 2.5 ACHPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $55 every 12 months.
Fan plus purifier in a design-forward room
Undersized · 2.4 ACHPlanning values; assumes 16 hr/day at $0.18/kWh. Filter: $80 every 12 months.
Use the guides to understand CADR, air changes, filters, and recurring cost before comparing individual machine records.
Convert room volume and target air changes into a clean-air delivery target.
Read the sizing guide →Estimate annual upkeep and compare only machines that meet the same room target.
Read the cost guide →Calculate purchase, power, replacement filters, and multi-year cost with your assumptions.
Calculate ownership cost →See a transparent editorial shortlist organized by clean-air fit rather than unsupported health claims.
Compare by room size →A purifier cannot remove pollution at its source, replace safe ventilation, or guarantee health outcomes. Correct sizing, maintenance, and continuous operation matter.
Required CADR = room volume × target ACH ÷ 60. Higher ceilings mean more air to clean.
For smoke, pollen, and fine particles, prioritize verified CADR and effective filtration. HEPA alone does not state airflow.
Purchase price, electricity, replacement-filter price, and replacement interval all affect ownership cost.
EPA advises against ozone generators in occupied spaces. Prefer mechanical filtration; treat ionization as an explicit choice.
These sources explain room air cleaners, CADR, ventilation, and energy efficiency. They do not validate every prototype product record above.