HomeAirQualityLab

Practical guides for cleaner indoor air

Clear, real-world explanations for air purifiers, humidifiers, dehumidifiers, and monitoring — plus simple calculators for room size and CADR.

Browse by topic

Air Purifiers

Room coverage, CADR, noise, filters, and what actually improves indoor air.

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Room Size & CADR Calculators

Tools to match room size to CADR/ACH targets and avoid underpowered setups.

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Comparisons

HEPA vs carbon, purifier vs humidifier vs dehumidifier, and other common decisions.

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HEPA Filters

HEPA grades, particle capture, leak paths, and what matters in real rooms.

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Carbon Filters & VOCs

Odors and VOCs: carbon types, contact time, and realistic expectations.

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Allergies & Asthma

Practical setup tips to reduce triggers: pollen, dust, pets, and indoor irritants.

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Air Quality Monitors

PM2.5, CO2, VOC sensors—how to interpret readings and spot bad ventilation.

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Ventilation & Air Exchange

Fresh air, CO2, exhaust fans, air exchange basics, and airflow mistakes.

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Humidifiers

Humidity targets, winter dryness, cleaning routines, and avoiding mold risk.

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Dehumidifiers

Basement dampness, sizing by liters/pints, drainage, and preventing musty air.

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Mold & Dampness

Condensation, hidden moisture, remediation basics, and keeping RH under control.

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Safety & Standards

Ozone/ionizers, certifications, filter safety, and standards that matter.

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Maintenance & Replacement

Filter schedules, cleaning, costs, and habits that keep performance stable.

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Dust, PM2.5 & Particles

Particles explained: sources, PM2.5 risks, and what reduces exposure indoors.

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Featured guides

Latest guides

CADR Calculator: Room Size + Ceiling Height + ACH Target
CADR Calculator: Room Size + Ceiling Height + ACH Target

Learn how to calculate the CADR you need using room size, ceiling height, and ACH targets…

Air Purifier in a Humid Room: Does High Humidity Reduce Performance?
Air Purifier in a Humid Room: Does High Humidity Reduce Performance?

Learn how high humidity affects air purifier filters, airflow, and placement, plus simple ways to balance…

Air Purifier for Mold Spores: What Works and What Doesn’t
Air Purifier for Mold Spores: What Works and What Doesn’t

Learn how air purifiers handle mold spores, what technologies actually help, and how to combine filtration,…

Air Purifier for Cat Litter Odor: Carbon Filters That Actually Help
Air Purifier for Cat Litter Odor: Carbon Filters That Actually Help

Learn how air purifiers with the right carbon filters can actually help with cat litter odor,…

Air Purifier for Cigarette Smoke: Carbon Needs and Limitations
Air Purifier for Cigarette Smoke: Carbon Needs and Limitations

Learn how air purifiers handle cigarette smoke, what activated carbon can and cannot do, and how…

Can an Air Purifier Reduce Dust on Furniture? Expectations vs Reality
Can an Air Purifier Reduce Dust on Furniture? Expectations vs Reality

Learn how much an air purifier can really reduce dust on furniture, what affects results, and…

Do You Need a Pre-Filter? Extending HEPA Life and Reducing Costs
Do You Need a Pre-Filter? Extending HEPA Life and Reducing Costs

Learn how pre-filters work with HEPA filters, when you need one, and how they can extend…

HEPA Air Purifier vs “Washable Filter” Claims: What to Look For
HEPA Air Purifier vs “Washable Filter” Claims: What to Look For

Compare HEPA air purifiers and washable filter claims, learn how they actually work, and understand what…

Air Purifier for Open-Plan Living Rooms: Coverage, Circulation, and Doors
Air Purifier for Open-Plan Living Rooms: Coverage, Circulation, and Doors

Learn how to size, place, and use air purifiers in open-plan living rooms, including airflow around…