MRH by OK Play — Clean air, proven

Our Products Are Validated
by IIT Delhi

An independent IIT Delhi study tested MRH in real schools over 60 days, through Delhi’s worst air. The result: up to 90% fewer pollutants, indoors and out. No lab tricks, just measured proof.

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Products That Speak
for Itself

We design our products with the environment in mind. That starts by using recycled and responsibly sourced materials.

PureAir

2,000sq ft.

of area coverage from a single unit — built for large, open indoor spaces.

99.9%

filter efficiency, capturing fine particles down to 0.3 microns.

2,800m³/h

Clean Air Delivery Rate (CADR) for rapid, whole-room purification.

AirFINEry

4,000sq ft.

of area coverage from a single unit — built for the largest open indoor spaces.

99.9%

filter efficiency, capturing fine particles down to 0.3 microns.

3,500m³/h

Clean Air Delivery Rate (CADR) for rapid, whole-room purification.

Our IIT Results

Making products that last and can be recycled at their end of life helps protect the earth’s precious resources.

Up to 97%
Efficacy

High efficacy, ranging from 70% to 90%, was observed indoors during both medium and heavy pollution, while efficacy ranged from 70% to 97% outdoors.

~75% Fewer
Particles

A significant ~75% reduction in ultrafine, coarse particles, and others was observed within 3 to 6 hours in a naturally ventilated room with doors and windows open, and ongoing activities.

Below
20 µg/m³

After the reduction, the purifier can maintain safe levels and even reduce the concentration to below 20 µg/m³ (WHO recommended levels).

ISO 1000
Clean Room

Continuous use in a controlled environment can help achieve an ISO 1000 clean room standard (≤ 1000 particles/cm³) — ideal for highly sensitive spaces like operation theaters, labs, and ICUs.

Very Poor
to Good

AQI dropped from Very Poor to Good — the environment started at a Very Poor AQI (301–400) and improved to Good (0–50) after the purifier ran, with a substantial decrease in both particulate matter and particle number concentrations.

Strong Removal
Efficiency

Strong removal efficiency vs. no purifier — with the purifier: 66 ± 13% for ultrafine particles (PM0.1) and 83 ± 1% for fine particles (PM2.5). Without it, efficiency was much lower (22 ± 8% ultrafine, 51 ± 5% fine).

High Particle
Reduction

High particle reduction rates — reduction rate of 853 ± 636 particles/cm³/hr for ultrafine and 3,031 ± 918 particles/cm³/hr for fine particles, both significantly higher with the purifier running.

61% PM Mass
Reduction

Strong PM mass reduction — 61 ± 4% removal efficiency for PM mass with the purifier vs. only 15 ± 7% without, with removal rates up to 68 µg/m³ per hour.