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#greenbuilding — Public Fediverse posts

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

  1. 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

  2. To help make connections: name 5-7 things that interest you but aren't in your profile, as tags so they are searchable.

Then boost this post or repeat its instructions so others know to do the same.

    #Xeriscaping
    #HeirloomPlants
    #FountainPens
    #GhostStories
    #Reading
    #Folklore
    #GreenBuilding

  3. Have you ever wanted to live in an eco-village? Here are plans for 7 different open source models with details under development for how to build them all.

    onecommunityglobal.org/highest

    #EcoLiving #SustainableCommunities #GreenBuilding #OpenSourceDesign

  4. Have you ever wanted to live in an eco-village? Here are plans for 7 different open source models with details under development for how to build them all.

    onecommunityglobal.org/highest

    #EcoLiving #SustainableCommunities #GreenBuilding #OpenSourceDesign

  5. Why cities around the world are uniting to keep cool

    A new global initiative is helping cities from #PhoenixAZ to #QuezonCity address #ExtremeHeat with #SharedSolutions and #LocalAction.

    From the #C40 website: "Cities are focusing on increasing green cover, cool roofs, and shaded public areas in places that experience the most heat and the least access to adequate cooling."

    Nov 05, 2025

    "The following is a sponsored op-ed written by Kate Gallego, Mayor of Phoenix, Arizona and Joy Belmonte, Mayor of Quezon City, the #Philippines and sponsored by C40 Cities.

    This summer, cities around the world broke temperature records once again. The results were devastating: Extreme heat now kills nearly half a million people each year, and the danger keeps rising. By 2050, the number of people in cities exposed to life-threatening heat is expected to increase fivefold.

    From the desert of Phoenix in the United States to the humid streets of Quezon City in the Philippines, mayors are facing the same new reality: Heat is here to stay, and it is impacting every element of city life. That’s why we — along with more than 30 other mayors from C40 Cities, a global network of nearly 100 of the world’s biggest cities tackling the #ClimateEmergency — are joining forces to protect our people today and prepare our communities for a hotter tomorrow. Through the new C40 #CoolCities Accelerator, we’ll work together to speed up bold and inclusive #ClimateAction that meets the urgency of this growing threat.

    In some ways, our cities couldn’t be more different. Phoenix, America’s fifth largest city, sits in Arizona’s Sonoran Desert, and sees more than 300 days of sunshine a year. Quezon City, the most populous city in the Philippines, faces sweltering humidity and the annual risk of typhoons. Yet both cities are on the front lines of rising temperatures that threaten health, strain our power grids, and deepen inequality.

    Extreme heat is the deadliest climate hazard, but it’s also the quietest. It kills through heatstroke and dehydration, and by worsening heart and respiratory conditions. It’s often felt most by the people with the fewest resources to cope: older adults, children, outdoor workers, and low-income communities. In Phoenix, residents in low-income neighbourhoods can experience temperatures several degrees higher than in wealthier parts of the city. In Quezon City, densely populated neighborhoods can become dangerous heat traps.

    We refuse to accept a future in which a heatwave becomes a death sentence for those with the least, and whose responsibility for the climate crisis is disproportionately small. The Cool Cities Accelerator is our shared plan to prevent that. In line with COP30’s call for a ‘decade of delivery,’ this provides a practical framework for mayors to act boldly and share what works.

    First, we’re protecting lives right now. Participating cities are appointing heat leaders, improving early-warning systems, and coordinating emergency responses across agencies. Phoenix, for example, created the US’s first publicly-funded Office of Heat Response and Mitigation, expanded access to chilled water stations, and opened cooling and hydration stations, including overnight cooling center options to bring relief where it’s needed most. Meanwhile, Quezon City is currently mapping heat-vulnerable communities and developing a citywide heat-health action plan. It has already adjusted work hours for outdoor workers, and introduced heat-tolerant crops across more than 1,400 urban farms.

    The goal is to build long-term resilience. Within five years, cities in the Accelerator will integrate cooling into building codes, redesign streets for shade and airflow, and expand tree canopies and green corridors. Phoenix is piloting reflective ‘cool pavements’, planting thousands of trees, and building artistic shade structures and setting regional standards for heat-ready infrastructure. Quezon City is restoring parks and greening schools and public spaces. As part of these efforts, the city has supported local groups turning vacant lots into small forests and gardens, while encouraging private development to adopt greener designs under its Green Building Ordinance. These efforts save lives, and cut energy bills while improving neighbourhoods.

    But urban heat doesn’t stop at city limits, and neither should our solutions. That’s why collaboration is at the heart of the Cool Cities Accelerator. Thirty-two cities — from Austin to Athens and Singapore to Santiago — are now exchanging data and design ideas. The details on the ground obviously differ, but the solutions we craft together are remarkably similar, creating more shade, better design, and better care for the most vulnerable. When our teams share lessons on early-warning systems, or how to engage with our communities, we all move faster and more effectively.

    For too long, extreme heat has been under-measured and under-estimated. We can build cities that are not only cooler, but more fair. But to do so, we must act together, and we must act now. We need to deliver solutions that both keep people alive today, and allow future generations to thrive."

    Source:
    grist.org/sponsored/why-cities

    More info about #C40:
    c40.org/accelerators/cool-citi

    #SolarPunkSunday #ExtremeHeat #Resiliency #Cooling #Greenspace #GreenBuilding #GreenCorridors #HardeningInfrastructure #ClimateChange

  6. Why cities around the world are uniting to keep cool

    A new global initiative is helping cities from #PhoenixAZ to #QuezonCity address #ExtremeHeat with #SharedSolutions and #LocalAction.

    From the #C40 website: "Cities are focusing on increasing green cover, cool roofs, and shaded public areas in places that experience the most heat and the least access to adequate cooling."

    Nov 05, 2025

    "The following is a sponsored op-ed written by Kate Gallego, Mayor of Phoenix, Arizona and Joy Belmonte, Mayor of Quezon City, the #Philippines and sponsored by C40 Cities.

    This summer, cities around the world broke temperature records once again. The results were devastating: Extreme heat now kills nearly half a million people each year, and the danger keeps rising. By 2050, the number of people in cities exposed to life-threatening heat is expected to increase fivefold.

    From the desert of Phoenix in the United States to the humid streets of Quezon City in the Philippines, mayors are facing the same new reality: Heat is here to stay, and it is impacting every element of city life. That’s why we — along with more than 30 other mayors from C40 Cities, a global network of nearly 100 of the world’s biggest cities tackling the #ClimateEmergency — are joining forces to protect our people today and prepare our communities for a hotter tomorrow. Through the new C40 #CoolCities Accelerator, we’ll work together to speed up bold and inclusive #ClimateAction that meets the urgency of this growing threat.

    In some ways, our cities couldn’t be more different. Phoenix, America’s fifth largest city, sits in Arizona’s Sonoran Desert, and sees more than 300 days of sunshine a year. Quezon City, the most populous city in the Philippines, faces sweltering humidity and the annual risk of typhoons. Yet both cities are on the front lines of rising temperatures that threaten health, strain our power grids, and deepen inequality.

    Extreme heat is the deadliest climate hazard, but it’s also the quietest. It kills through heatstroke and dehydration, and by worsening heart and respiratory conditions. It’s often felt most by the people with the fewest resources to cope: older adults, children, outdoor workers, and low-income communities. In Phoenix, residents in low-income neighbourhoods can experience temperatures several degrees higher than in wealthier parts of the city. In Quezon City, densely populated neighborhoods can become dangerous heat traps.

    We refuse to accept a future in which a heatwave becomes a death sentence for those with the least, and whose responsibility for the climate crisis is disproportionately small. The Cool Cities Accelerator is our shared plan to prevent that. In line with COP30’s call for a ‘decade of delivery,’ this provides a practical framework for mayors to act boldly and share what works.

    First, we’re protecting lives right now. Participating cities are appointing heat leaders, improving early-warning systems, and coordinating emergency responses across agencies. Phoenix, for example, created the US’s first publicly-funded Office of Heat Response and Mitigation, expanded access to chilled water stations, and opened cooling and hydration stations, including overnight cooling center options to bring relief where it’s needed most. Meanwhile, Quezon City is currently mapping heat-vulnerable communities and developing a citywide heat-health action plan. It has already adjusted work hours for outdoor workers, and introduced heat-tolerant crops across more than 1,400 urban farms.

    The goal is to build long-term resilience. Within five years, cities in the Accelerator will integrate cooling into building codes, redesign streets for shade and airflow, and expand tree canopies and green corridors. Phoenix is piloting reflective ‘cool pavements’, planting thousands of trees, and building artistic shade structures and setting regional standards for heat-ready infrastructure. Quezon City is restoring parks and greening schools and public spaces. As part of these efforts, the city has supported local groups turning vacant lots into small forests and gardens, while encouraging private development to adopt greener designs under its Green Building Ordinance. These efforts save lives, and cut energy bills while improving neighbourhoods.

    But urban heat doesn’t stop at city limits, and neither should our solutions. That’s why collaboration is at the heart of the Cool Cities Accelerator. Thirty-two cities — from Austin to Athens and Singapore to Santiago — are now exchanging data and design ideas. The details on the ground obviously differ, but the solutions we craft together are remarkably similar, creating more shade, better design, and better care for the most vulnerable. When our teams share lessons on early-warning systems, or how to engage with our communities, we all move faster and more effectively.

    For too long, extreme heat has been under-measured and under-estimated. We can build cities that are not only cooler, but more fair. But to do so, we must act together, and we must act now. We need to deliver solutions that both keep people alive today, and allow future generations to thrive."

    Source:
    grist.org/sponsored/why-cities

    More info about #C40:
    c40.org/accelerators/cool-citi

    #SolarPunkSunday #ExtremeHeat #Resiliency #Cooling #Greenspace #GreenBuilding #GreenCorridors #HardeningInfrastructure #ClimateChange

  7. Here's the results of 20+ hours of independent and open source research into the most sustainable, eco-friendly, safe and healthy adhesives and adhesive companies. The page also discusses the various toxins in most products and provides resources for learning more. Know what's in your products before you introduce them into your living spaces, it is important to your health and the health of your family.

    onecommunityglobal.org/most-su

    #SustainableLiving #EcoFriendly #NonToxic #GreenBuilding

  8. Here's the results of 20+ hours of independent and open source research into the most sustainable, eco-friendly, safe and healthy adhesives and adhesive companies. The page also discusses the various toxins in most products and provides resources for learning more. Know what's in your products before you introduce them into your living spaces, it is important to your health and the health of your family.

    onecommunityglobal.org/most-su

    #SustainableLiving #EcoFriendly #NonToxic #GreenBuilding

  9. "The world's largest free education resources archive sharing over 200 different free and online education resources organized by subject, age, and area of interest.

    A ""Suggestions"" link on the page allows you to submit your own resources if you know of a good one that isn't already listed."

    onecommunityglobal.org/free-ed

    #WaterConservation #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity

  10. "The world's largest free education resources archive sharing over 200 different free and online education resources organized by subject, age, and area of interest.

    A ""Suggestions"" link on the page allows you to submit your own resources if you know of a good one that isn't already listed."

    onecommunityglobal.org/free-ed

    #WaterConservation #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity

  11. "The world's largest free education resources archive sharing over 200 different free and online education resources organized by subject, age, and area of interest.

    A ""Suggestions"" link on the page allows you to submit your own resources if you know of a good one that isn't already listed."

    onecommunityglobal.org/free-ed

    #WaterConservation #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity

  12. "The world's largest free education resources archive sharing over 200 different free and online education resources organized by subject, age, and area of interest.

    A ""Suggestions"" link on the page allows you to submit your own resources if you know of a good one that isn't already listed."

    onecommunityglobal.org/free-ed

    #WaterConservation #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity

  13. "The world's largest free education resources archive sharing over 200 different free and online education resources organized by subject, age, and area of interest.

    A ""Suggestions"" link on the page allows you to submit your own resources if you know of a good one that isn't already listed."

    onecommunityglobal.org/free-ed

    #WaterConservation #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity

  14. Here are the results of 40+ hours of independent research to find the best faucets for conserving both water and energy. Low-flow, sensor-based, water-saving eco-friendly faucets and accessories are covered along with company sustainability benchmarking, features, certifications, and more.

    onecommunityglobal.org/most-su

    #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity #OpenSource #Conservation

  15. Here are the results of 40+ hours of independent research to find the best faucets for conserving both water and energy. Low-flow, sensor-based, water-saving eco-friendly faucets and accessories are covered along with company sustainability benchmarking, features, certifications, and more.

    onecommunityglobal.org/most-su

    #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity #OpenSource #Conservation

  16. Here are the results of 40+ hours of independent research to find the best faucets for conserving both water and energy. Low-flow, sensor-based, water-saving eco-friendly faucets and accessories are covered along with company sustainability benchmarking, features, certifications, and more.

    onecommunityglobal.org/most-su

    #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity #OpenSource #Conservation

  17. Here are the results of 40+ hours of independent research to find the best faucets for conserving both water and energy. Low-flow, sensor-based, water-saving eco-friendly faucets and accessories are covered along with company sustainability benchmarking, features, certifications, and more.

    onecommunityglobal.org/most-su

    #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity #OpenSource #Conservation

  18. Here are the results of 40+ hours of independent research to find the best faucets for conserving both water and energy. Low-flow, sensor-based, water-saving eco-friendly faucets and accessories are covered along with company sustainability benchmarking, features, certifications, and more.

    onecommunityglobal.org/most-su

    #SustainableFaucets #LowFlow #SensorFaucets #WaterSaving #EcoFriendly #EnergyEfficiency #SustainableLiving #GreenBuilding #Plumbing #OneCommunity #OpenSource #Conservation

  19. 🌍 Speaker Highlight: Martine Reinhold Kildeby at #SmartCityDay2025

    At the Expo, Martine will deliver an inspirational talk on “Future-proof urban solutions require collaboration”, sharing how innovation, knowledge, and partnerships can converge to create sustainable, resilient cities for tomorrow.

    #SmartCityDayHamburg #SmartBuilding #GreenBuilding #CircularConstruction #SustainableBuilding #SustainableNeighbourhood #SmartCity #BundesverbandSmartCity #BVSCnet #BVSC #BVSCevents #SmartCityEvents

  20. 🌍 Speaker Highlight: Martine Reinhold Kildeby at #SmartCityDay2025

    At the Expo, Martine will deliver an inspirational talk on “Future-proof urban solutions require collaboration”, sharing how innovation, knowledge, and partnerships can converge to create sustainable, resilient cities for tomorrow.

    #SmartCityDayHamburg #SmartBuilding #GreenBuilding #CircularConstruction #SustainableBuilding #SustainableNeighbourhood #SmartCity #BundesverbandSmartCity #BVSCnet #BVSC #BVSCevents #SmartCityEvents

  21. From waste to wonder Pretty Plastic turns recycled materials into high-quality façades for bold, sustainable architecture.

    Meet Pretty Plastic at #SmartCityDay2025 and see how circular thinking, design excellence and urban innovation are shaping the buildings and cities of tomorrow.

    📍 September 10, 2025
    📍 Hamburg Cruise Center Baakenhöft
    📍 Noon – 6 pm

    🔗 More Infos: smart-city-day.net/exhibitor-n

    #SmartCityDayHamburg #BVSCnet #GreenBuilding #CircularConstruction #PrettyPlastic #BuildingFromWaste

  22. Ausstellung 200 Jahre KIT | 100 Objekte. Teile des Ganzen

    Anlässlich des 200-jährigen Jubiläums des @KIT_Karlsruhe zeigt das ZKM eine interaktive Ausstellung zur Geschichte des KIT – auch wir sind mit einem Exponat vertreten: Nr. 090 Klimaschonender Zement.

    Der so genannte "Celitement" ist eine Antwort auf den enormen ökologischen Fußabdruck des zeitgenössischen Baubetriebs. Celitement wurde als klimaschonender Zement am KIT entwickelt und vom ITAS durch umfassende Nachhaltigkeitsanalysen begleitet. Das Besondere: Seine Produktion spart im Vergleich zu herkömmlichen Zementen rund 25% der CO2-Emissionen ein. Das Exponat zeigt, wie ingenieurwissenschaftliche Innovation und systemanalytische Nachhaltigkeitsforschung Hand in Hand gehen.

    📍 Die Ausstellung ist noch bis zum 19.10.2025 im ZKM Karlsruhe zu sehen – Eintritt frei!
    💻 Alternativ könnt ihr sie auch online auf der Website des ZKM besuchen: zkm.de/de/2025/04/200-jahre-ki

    #KIT200 #Celitement #Nachhaltigkeit #BauenMitZukunft #ZKM #ITAS #ForschungFürsKlima #GreenBuilding #Innovation #Karlsruhe

  23. maximizemarketresearch.com/mar

    ♻️ The Future of Construction: Growth of Recycled Construction Aggregates ♻️

    The Global Recycled Construction Aggregates Market is witnessing a significant surge as industries shift toward sustainable building materials.

    🔹 #RecycledAggregates #SustainableConstruction #GreenBuilding #CircularEconomy #ConstructionInnovation