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Net Zero - its over.
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<blockquote data-quote="Dave645" data-source="post: 8904559" data-attributes="member: 55822"><p>No lol, air tight still requires a 50% air volume change every hour and the pressures in the house is what it is out side.</p><p>Air tight is not air tight it’s very air tight, but not air tight.</p><p>An average house has to be a 10 on the airtight scale the building control test for, a passive house has to be under 0.6. </p><p>the best the building control had tested before mine was a one bed flat that got a 3 my house got a 1 so just over passive cert standard but still 10 times better than the average house.</p><p></p><p>and all my air is filtered as it comes into my house for those with allergies it’s a nice extra.</p><p>Air tight only comes into play in the cold months where the energy savings are massive.</p><p>I am free to have windows open any other time if I wish.</p><p>The heat recovery is 95% efficient at recovering heat from the air leaving my home via the heat recovery unit.</p><p>So half the volume of my house every hour and I recover 95% of the heat I would normally lose to ventilation. From say trickle vents open windows etc etc.</p><p>And my home is one temp 24/7 as the heat recovery helps with that and my heating in the deep winter end of November to around March time. When just lighting my wood burner for a few hours every few days is all the house needs. Before I put my GSHP on. When the days get short so solar gain from the sun on my windows is reduced.</p></blockquote><p></p>
[QUOTE="Dave645, post: 8904559, member: 55822"] No lol, air tight still requires a 50% air volume change every hour and the pressures in the house is what it is out side. Air tight is not air tight it’s very air tight, but not air tight. An average house has to be a 10 on the airtight scale the building control test for, a passive house has to be under 0.6. the best the building control had tested before mine was a one bed flat that got a 3 my house got a 1 so just over passive cert standard but still 10 times better than the average house. and all my air is filtered as it comes into my house for those with allergies it’s a nice extra. Air tight only comes into play in the cold months where the energy savings are massive. I am free to have windows open any other time if I wish. The heat recovery is 95% efficient at recovering heat from the air leaving my home via the heat recovery unit. So half the volume of my house every hour and I recover 95% of the heat I would normally lose to ventilation. From say trickle vents open windows etc etc. And my home is one temp 24/7 as the heat recovery helps with that and my heating in the deep winter end of November to around March time. When just lighting my wood burner for a few hours every few days is all the house needs. Before I put my GSHP on. When the days get short so solar gain from the sun on my windows is reduced. [/QUOTE]
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