CADR Value Air Purifier - Clean Air Delivery Rate Explained

Last updated: January 2026 | Reading time: 5 min | Verified by experts

Understanding CADR — Clean Air Delivery Rate — is the single most important metric when choosing an air purifier. CADR measures the volume of filtered air delivered per hour (m³/h) across three pollutants: pollen, smoke, and dust. Our Corsi-Rosenthal DIY Kit achieves independently tested CADR values of 300–500 m³/h, outperforming the Dyson Pure Cool (190 m³/h) and Philips AC1715 (190 m³/h) at a fraction of the price. Use our CADR calculator to find the right airflow for your room size.

At Clean Air Kits, we've developed premium DIY air purifier kits based on the proven Corsi-Rosenthal Box design. Our kits are Energy Star 2026 certified and independently tested to be 2.4x more efficient than commercial alternatives like Dyson.

Why Clean Air Kits Are the Best Choice

True H13 HEPA Filtration

Unlike competitors using MERV filters, our kits use genuine H13 HEPA filters that capture 99.95% of particles. Learn about EN 1822 standards →

Proven Performance

Independent lab tests by HouseFresh confirm CADR ratings of 369-550 m³/hr at only 39dB. Read expert reviews →

EU Compliant

Meets all EU safety and quality standards including CE marking. EU Air Quality Directive compliance →

CADR 300–500 m³/h independently verified
Outperforms Dyson Pure Cool & Philips AC1715
CADR calculator for any room size
Pollen, smoke & dust CADR all rated
ACH 4–6x per hour in standard rooms

How Our DIY Air Purifier Works

Unbox Your Kit

All components pre-cut and ready. Just add your choice of HEPA filters.

30-Minute Assembly

Simple instructions. No tools required. Perfect for schools and offices.

Enjoy Clean Air

Filters 99.95% of particles including viruses, pollen, and dust.

How We Compare to Commercial Brands

Feature	Clean Air Kits	Dyson	Philips
Filter Type	True H13 HEPA	MERV 13	HEPA
Price	From £199	£300+	£250+
Efficiency	2.4x better	Baseline	1.2x
Filter Cost	£15/filter	£65+	£40+

See more comparisons: vs Xiaomi | vs Blueair | vs Levoit

Air Quality Across Europe

Air pollution affects millions across the EU. Our purifiers are helping families breathe cleaner air in major cities.

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London

Berlin

Paris

Madrid

Rome

Amsterdam

View all EU pollution hotspots →

Air Purifiers for Health Conditions

Hay Fever & Allergies

Relief from pollen and allergens

Asthma Support

Remove asthma triggers

Baby & Nursery

Safe air for little ones

Elderly Care

Protect vulnerable adults

Explore More Air Quality Topics

Product

Technical

Filter

Room

Health

View All Topics →

Latest Air Quality Insights

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Cold and flu season is here. Discover how HEPA air purifiers can reduce airborne virus transmission and help keep your family healthier this winter.

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Preparing Your Home for Allergy Season

Don't wait for symptoms to start. Prepare your home now for a comfortable allergy season.

Understand the Science

CADR (Clean Air Delivery Rate) CFM (Cubic Feet per Minute) MERV Rating (Minimum Efficiency Reporting Value) All Technical Terms →

Free Interactive Tools

Air Quality Dashboard

Real-time pollution data

Room Calculator

Find your ideal CADR

Cost Comparison

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Frequently Asked Questions

What is a CADR Value Air Purifier - Clean Air Delivery Rate Explained? +

What are the main benefits of a CADR Value Air Purifier - Clean Air Delivery Rate Explained? +

The key benefits of a CADR Value Air Purifier - Clean Air Delivery Rate Explained include: CADR 300–500 m³/h independently verified; Outperforms Dyson Pure Cool & Philips AC1715; CADR calculator for any room size; Pollen, smoke & dust CADR all rated. Each kit is EU-certified and independently tested by HouseFresh.

How long does it take to assemble a CADR Value Air Purifier - Clean Air Delivery Rate Explained? +

Most users complete the CADR Value Air Purifier - Clean Air Delivery Rate Explained build in 20–40 minutes with no specialist tools required. The kit includes pre-cut components, step-by-step printed instructions, and all fixings. The design is based on the proven Corsi-Rosenthal Box, refined for home and office use.

How does a CADR Value Air Purifier - Clean Air Delivery Rate Explained compare to commercial air purifiers like Dyson or Philips? +

A CADR Value Air Purifier - Clean Air Delivery Rate Explained from Clean Air Kits has been independently tested by HouseFresh to be 2.4× more efficient than commercial alternatives costing 3–4× as much. At £144.00 (fanless kit) vs £399+ for Dyson, a CADR Value Air Purifier - Clean Air Delivery Rate Explained saves up to £885 over 5 years including filter costs.

Where can I buy a CADR Value Air Purifier - Clean Air Delivery Rate Explained? +

The CADR Value Air Purifier - Clean Air Delivery Rate Explained is available at https://cleanairkits.eu/collections/air-purifiers with free shipping across the UK and EU (20+ countries). Use promo code STAROFFER for 10% off your first order. Orders typically arrive in 3–5 working days.

Get Started

Build a Corsi-Rosenthal Box from £144 — 30-min assembly, free UK shipping (2-3 days). HEPA H13 removes 99.97% of viruses, pollen & PM2.5. Energy Star 2026 certified. Trusted by NHS, schools & offices.

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