The blower door test

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The blower door test was invented by Harold Orr and reveals how well sealed a home is. A passive house must get below 0.6 air exchanges per hour. Photo David Dodge, GreenEnergyFutures.ca

The blower door test was invented by Harold Orr and reveals how well sealed a home is. A passive house must get below 0.6 air exchanges per hour. Photo David Dodge, GreenEnergyFutures.ca