Thanks Respirabuilt for sharing this video Jan 6, 2025

At RespiraBuilt, we specialise in creating innovative hempcrete solutions to shape healthier, more sustainable living environments. Our eco-friendly hemp blocks are designed to revolutionize construction by providing superior insulation, energy efficiency, and carbon-negative benefits.

Link: https://www.respirabuilt.com.au/

We produce a new topic each month so tune in.

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CSIRO Study Exposes Why Australian Homes Are Leaking Energy (Passive House Fix!) Mar 7, 2025

 #SustainableBuilding #PassiveHouse #Airtightness

Did you know the average Australian home is leaking up to 30 air changes per hour? That means every 40 minutes, all your heated or cooled air is replaced with outdoor air, wasting energy and costing you money!  In this video, I break down the shocking findings from CSIRO’s latest study on airtightness in Australian homes. 

We’ll cover:  

✅ Why air tightness is crucial for energy efficiency & comfort

 ✅ The hidden dangers of poor air sealing (and how it harms your health) ✅ How Australian homes have improved— but still have a long way to go ✅ The Passive House approach & why it reduces energy use by 3x  🔗 Read the CSIRO study here: CSIRO Air Tightness Report 

 🔗 Learn more about Passive House design & our approach: www.borlandarch.com.au

Thanks for sharing.

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Sustainable Building Materials

United Nations • Climate change refers to long-term shifts in temperatures and weather patterns. Human activities have been the main driver of climate change, primarily due to the burning of fossil fuels like coal, oil and gas.

Dec 21, 2024

This webinar explores which building materials are the most sustainable options for your build or renovation. This is part of the “Introduction to Sustainable Building” series presented by energy experts Renew on behalf of Bass Coast Shire Council and South Gippsland Shire Council.

Following the annual Sustainable House Day on Sunday 4 May 2025, the Webinar Series provides an enriching continuation of the conversation around sustainable and energy-efficient homes. These sessions take place online during May, featuring expert panels and speakers addressing key topics in sustainable living. Designed to delve deeper into practical solutions and innovations, the sessions empower homeowners and enthusiasts to make informed decisions for a greener future.https://sustainablehouseday.com/2025-featured-homes/

See other https://sustainablehouseday.com/listing/geoffs-hemp-house/

Geoff’s house is a highly thermally efficient 8.8 star hemp house with exposed slab on ground and slab edge insulation. It uses passive solar design. The main roof faces due north, tilted up at 20 degrees and is designed to take 20KWh of PV panels (it currently has 11KWh installed) and has 1.0m eaves to east and west. There are south facing clearstory windows for summer ventilation plus a heat recovery ventilation system. All external windows and doors are double glazed with FSC hardwood frames.Designed by Earlx2 Architechture📷This house achieved a NatHERS rating of 8.8 stars using NatHERS accredited software (BERSPro). Find out how the star ratings work on the Nationwide House Energy Rating Scheme (NatHERS) website.

ENERGY AND WATER EFFICIENT FEATURES SUSTAINABLE & RECYCLED MATERIALS INSULATION SPECIFICATIONS RENEWABLE ENERGY SPECIFICATIONS COSTS AND COST SAVINGS HOUSE DESIGN SPECIFICATIONS GARDEN AND WASTE REDUCTION HEALTHY HOME FEATURES

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Following the annual Sustainable House Day on Sunday 4 May 2025, the Webinar Series provides an enriching continuation of the conversation around sustainable and energy-efficient homes. These sessions take place online during May, featuring expert panels and speakers addressing key topics in sustainable living. Designed to delve deeper into practical solutions and innovations, the sessions empower homeowners and enthusiasts to make informed decisions for a greener future.

Each week focuses on a distinct aspect of sustainability, offering in-depth discussions and Q&A opportunities. Past topics have included:

• Design and Planning: Steps for creating functional, sustainable home designs.
• Building Materials: Insights on reducing embedded carbon and choosing eco-friendly materials.
• Heating and Cooling: Principles of passive solar design and optimizing energy efficiency.
• Technology for Sustainability: Transitioning to all-electric systems and selecting the right solar solutions.

Sessions are hosted via Zoom and typically feature a mix of experts, sustainable builders, and homeowners sharing firsthand experiences. Recordings are made available afterward, ensuring accessibility for those who may have missed the live discussions.

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Aug 14, 2017

Thanks Paul Weaton - for I have answered the "what is a rocket mass heater?" question hundreds of times.   This is my attempt to make a very short answer.  Sure, there is a hundred times more info .... maybe a thousand times more info ...   but the function of this video is to give a quick idea of what it is.  We start with the idea of a conventional wood stove.  The fire is typically around 1000 degrees F.  Heat is extracted immediately.   Smoke goes up the chimney due to a thermosiphon.  This design has the problem of creosote leading to chimney fires.  So if you insulate the chimney, the chimney gets hot enough that the creosote burns much more often - thus reducing the risk.  But the downside is that more heat leaves the house through the chimney.     We shift the design to insulate the fire box.  With temperature now at 1800 degrees F, the creosote and the smoke are burned.  The exhaust is mostly steam and CO2.  We can now safely extract more heat.   We add a stubby chimney so we can push the exhaust wherever we want.  We add a mass to absorb heat.  That's it.  A rocket mass heater.    And then we add some pictures of pretty rocket mass heaters.    Thanks Paul Weaton for shaing videot

 http://permies.com

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Jun 28, 2021

In the summer I leave the wood feed for the rocket mass heater wide open.  In the day, I keep the windows closed, and during the night I keep the windows open.    At night, the temperature outside is a little colder than the temperature inside.   Since the temperature in the barrel is all about the same, the “p-trap” action is disabled.   The warmer air in the vertical exhaust moves up and outside.   This pulls air in through the wood feed, past the barrel, through the mass and out the roof.  Air is moving, slowly, through the whole system.  As dawn approaches, the mass has been cooled a bit - pretty close to the coldest point at dawn.    During the day, the temperature outside is warmer than inside.   A cold plug happens.   Air no longer moves through the system.    At the hottest point of the day, people tend to gather near the rocket mass heater since it is now the coolest part of the house.   The mass feels quite cool.    Doing the thing about opening the windows at night is an old technique that cuts about seven to ten degrees off the hottest part of the day.  I think leaving the wood feed open all the time, cools the room about five to seven degrees more at the hottest part of the day.  Zero electricity - entirely passive.   Video and animation by Bernal Brothers Studio  Music Carmen Suite no. 2 - 2. Habanera (For recorder ensamble - Papalin) Creative Commons. Thanks Paul Weaton for shaing video

 http://permies.com

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