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A comment on Swedish Couple Builds Greenhouse Around Home. Parent comment

Re:Swedish Couple Builds Greenhouse Around Home by bjourne on Friday June 21, 2019 @07:59PM (#20247196)
Yes, but ventilating the house itself plus the surrounding greenhouse is much more expensive than just ventilating the house itself. Reason being that the volume of air is much larger.
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Re:Swedish Couple Builds Greenhouse Around Home by adrianmonk on Friday June 21, 2019 @09:34PM (#20247504)
I'm not an expert, but all greenhouses I've personally seen have natural ventilation with vents high up (such as at the peak of the roof) and near the ground.

The greenhouse effect makes the air inside a lot warmer than outside. This reduces its density, and it becomes buoyant and spills out the roof vent.

There may also be fans, but you can get some ventilation for free (energy-wise).

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Re:Swedish Couple Builds Greenhouse Around Home by NickNameNick on Saturday June 22, 2019 @12:48AM (#20248078)
You can see the open vents on the ridge in the first photo.
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