Passive house is a measured standard, not a style
Passive house caps air leakage at 0.6 changes an hour, tested by fan. It costs 5 to 10% more to build. A Los Angeles house on its lines outlasted a wildfire.
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Air conditioning harms the climate through power and gas
Air conditioning warms the planet twice, through the power it draws and the gas inside it. The UN's Mark Radka puts cooling at 7% of global emissions.
UK installers fill cavity walls through the outer brickwork
Installers drill through a UK home's outer brick and inject insulation into the cavity. A typical job costs about £2,200 and could save up to £370 a year.
Triple glazing's second gap cuts heat loss further
Triple glazing adds a third pane and a second gas-filled gap, so it loses less heat than double glazing. The whole window, frame included, sets the result.
A dual-flush toilet saves water with one valve, not two
A dual-flush toilet releases four litres or six through a single drop valve rather than two tanks, and that valve is also where leaks begin.