One Take #8 - Passive House Reality Check

An episode of the Air Quality Matters podcast, hosted by Simon Jones, titled "One Take #8 - Passive House Reality Check" was published on July 10, 2025 and runs 11 minutes.

July 10, 2025 ·11m · Air Quality Matters

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Summary

Send us a textGabriel Rojas and colleagues' comprehensive review examines indoor air quality in over 600 Passive Houses, revealing that properly-designed mechanical ventilation systems generally outperform conventional housing for background pollutants like CO2, VOCs and radon. Quality control makes a dramatic difference - a UK study found 100% of certified Passive Houses met required airflows while only 47% of non-certified MVHR homes even met basic building regulations.• Certified Passive Houses show consistently better ventilation performance than non-certified buildings with similar technology• Quality assurance processes are essential, not optional extras• Cooking pollution creates a significant blind spot in Passive House design• Recirculating cooker hoods fail to capture harmful PM2.5 particles, which remain trapped in airtight spaces• New Passive House guidance now strongly recommends extracting cooker hoods venting outside• Proper makeup air systems must be balanced with kitchen extraction• Both certification rigor and comprehensive pollutant management are necessary for truly healthy homesA review of the indoor air quality in residential Passive House dwellings Support the showCheck out the Air Quality Matters website for more information, updates and more. And the YouTube Channel The Air Quality Matters Podcast is brought to you in partnership with. Eurovent Farmwood Aereco Aico Ultra Protect Zehnder Group The One Take Podcast is brought to you in partnership with. SafeTraces & InBiot All great companies that share the podcast's passion for better air quality in the built environment. Supporting them helps support the show.

Episode Description

Send us a text

Gabriel Rojas and colleagues' comprehensive review examines indoor air quality in over 600 Passive Houses, revealing that properly-designed mechanical ventilation systems generally outperform conventional housing for background pollutants like CO2, VOCs and radon. Quality control makes a dramatic difference - a UK study found 100% of certified Passive Houses met required airflows while only 47% of non-certified MVHR homes even met basic building regulations.

• Certified Passive Houses show consistently better ventilation performance than non-certified buildings with similar technology
• Quality assurance processes are essential, not optional extras
• Cooking pollution creates a significant blind spot in Passive House design
• Recirculating cooker hoods fail to capture harmful PM2.5 particles, which remain trapped in airtight spaces
• New Passive House guidance now strongly recommends extracting cooker hoods venting outside
• Proper makeup air systems must be balanced with kitchen extraction
• Both certification rigor and comprehensive pollutant management are necessary for truly healthy homes

A review of the indoor air quality in residential Passive House dwellings

Support the show

Check out the Air Quality Matters website for more information, updates and more. And the YouTube Channel

The Air Quality Matters Podcast is brought to you in partnership with.

Eurovent Farmwood Aereco Aico Ultra Protect Zehnder Group

The One Take Podcast is brought to you in partnership with.

SafeTraces & InBiot

All great companies that share the podcast's passion for better air quality in the built environment. Supporting them helps support the show.