home.social

#indoorairquality — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #indoorairquality, aggregated by home.social.

  1. The 2024 UNSCEAR report has updated its methodology for evaluating indoor radon concentrations, part of the most comprehensive global assessment to date of public exposure to ionising radiation.
    Drawing on extensive literature review (2007-2022), it reconfirms: natural sources, including radon, remain by far the top contributors to public exposure worldwide.
    Worth a read. More on page 26: buff.ly/612i4NS
    #Radon #UNSCEAR #RadiationProtection #IndoorAirQuality

  2. The 2024 UNSCEAR report has updated its methodology for evaluating indoor radon concentrations, part of the most comprehensive global assessment to date of public exposure to ionising radiation.
    Drawing on extensive literature review (2007-2022), it reconfirms: natural sources, including radon, remain by far the top contributors to public exposure worldwide.
    Worth a read. More on page 26: buff.ly/612i4NS
    #Radon #UNSCEAR #RadiationProtection #IndoorAirQuality

  3. Interesting update for anyone working in radon protection or indoor air quality: pages 24-26 of the 2024 UNSCEAR report break down the latest radon level data across several countries, useful context for benchmarking where we stand globally.
    Worth a read if you follow this space. Link below, let me know what stands out to you.
    buff.ly/612i4NS
    #RadonAwareness #UNSCEAR #RadiationProtection #IndoorAirQuality

  4. Interesting update for anyone working in radon protection or indoor air quality: pages 24-26 of the 2024 UNSCEAR report break down the latest radon level data across several countries, useful context for benchmarking where we stand globally.
    Worth a read if you follow this space. Link below, let me know what stands out to you.
    buff.ly/612i4NS
    #RadonAwareness #UNSCEAR #RadiationProtection #IndoorAirQuality

  5. Morning run done — 8.5 km — and straight into ERA Workshop recap mode 🏃🎙️
    Yesterday in Bergamo: four talks on radon in water, RadonNet instruments, gamma spectrometry + indoor air risk assessment, and soil gas by Matej Neznal. Roundtable with ~40–45 on site and ~20 online. ERA AGM, Executive Committee meeting, rooftop dinner. ☀️ 25 degrees in Bergamo.
    Science doesn't stop. Neither does the training.
    #Radon #ERA #IndoorAirQuality #RadiationProtection #RunningScientist
    youtu.be/W7B_Ad1mgRo

  6. Morning run done — 8.5 km — and straight into ERA Workshop recap mode 🏃🎙️
    Yesterday in Bergamo: four talks on radon in water, RadonNet instruments, gamma spectrometry + indoor air risk assessment, and soil gas by Matej Neznal. Roundtable with ~40–45 on site and ~20 online. ERA AGM, Executive Committee meeting, rooftop dinner. ☀️ 25 degrees in Bergamo.
    Science doesn't stop. Neither does the training.
    #Radon #ERA #IndoorAirQuality #RadiationProtection #RunningScientist
    youtu.be/W7B_Ad1mgRo

  7. Heat Recovery Ventilator (HRV) — Operating Principle

    A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.

    ---

    How It Works

    Two airflows:

    Exhaust air (warm, from indoors)

    Supply air (cold, from outside)

    They pass through a heat exchanger:

    separated by plates or channels

    no direct mixing

    heat transfers through the material (conduction)

    Result: → supply air is preheated
    → exhaust air is cooled
    → overall heat loss is reduced

    ---

    Types of Recuperators

    1. Plate Heat Exchanger

    aluminum or plastic plates

    efficiency: ~60–90%

    no moving parts

    2. Rotary (Wheel) Heat Exchanger

    rotating drum

    transfers heat and some moisture

    efficiency: up to ~85–90%

    3. Counterflow Heat Exchanger

    air streams move in opposite directions

    highest efficiency: up to ~95%

    ---

    What Is Transferred

    heat (primary)

    sometimes moisture (in enthalpy units)

    ---

    Efficiency Example

    outside: 0°C

    indoor: +22°C

    after recovery: ~16–20°C

    ---

    Advantages

    reduced heating energy demand

    continuous ventilation without major heat loss

    improved indoor air quality

    ---

    Limitations

    frost formation in winter (needs bypass or preheater)

    filter maintenance required

    upfront cost

    ---

    Core Idea

    A recuperator doesn’t generate heat — it recovers and reuses it.

    #HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir

  8. Heat Recovery Ventilator (HRV) — Operating Principle

    A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.

    ---

    How It Works

    Two airflows:

    Exhaust air (warm, from indoors)

    Supply air (cold, from outside)

    They pass through a heat exchanger:

    separated by plates or channels

    no direct mixing

    heat transfers through the material (conduction)

    Result: → supply air is preheated
    → exhaust air is cooled
    → overall heat loss is reduced

    ---

    Types of Recuperators

    1. Plate Heat Exchanger

    aluminum or plastic plates

    efficiency: ~60–90%

    no moving parts

    2. Rotary (Wheel) Heat Exchanger

    rotating drum

    transfers heat and some moisture

    efficiency: up to ~85–90%

    3. Counterflow Heat Exchanger

    air streams move in opposite directions

    highest efficiency: up to ~95%

    ---

    What Is Transferred

    heat (primary)

    sometimes moisture (in enthalpy units)

    ---

    Efficiency Example

    outside: 0°C

    indoor: +22°C

    after recovery: ~16–20°C

    ---

    Advantages

    reduced heating energy demand

    continuous ventilation without major heat loss

    improved indoor air quality

    ---

    Limitations

    frost formation in winter (needs bypass or preheater)

    filter maintenance required

    upfront cost

    ---

    Core Idea

    A recuperator doesn’t generate heat — it recovers and reuses it.

    #HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir

  9. Heat Recovery Ventilator (HRV) — Operating Principle

    A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.

    ---

    How It Works

    Two airflows:

    Exhaust air (warm, from indoors)

    Supply air (cold, from outside)

    They pass through a heat exchanger:

    separated by plates or channels

    no direct mixing

    heat transfers through the material (conduction)

    Result: → supply air is preheated
    → exhaust air is cooled
    → overall heat loss is reduced

    ---

    Types of Recuperators

    1. Plate Heat Exchanger

    aluminum or plastic plates

    efficiency: ~60–90%

    no moving parts

    2. Rotary (Wheel) Heat Exchanger

    rotating drum

    transfers heat and some moisture

    efficiency: up to ~85–90%

    3. Counterflow Heat Exchanger

    air streams move in opposite directions

    highest efficiency: up to ~95%

    ---

    What Is Transferred

    heat (primary)

    sometimes moisture (in enthalpy units)

    ---

    Efficiency Example

    outside: 0°C

    indoor: +22°C

    after recovery: ~16–20°C

    ---

    Advantages

    reduced heating energy demand

    continuous ventilation without major heat loss

    improved indoor air quality

    ---

    Limitations

    frost formation in winter (needs bypass or preheater)

    filter maintenance required

    upfront cost

    ---

    Core Idea

    A recuperator doesn’t generate heat — it recovers and reuses it.

    #HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir