Full tour of 3 off-grid passive solar growing domes that can be used as 4-season year-round greenhouses in just about any climate and growing zone. The geodesic dome structure can withstand up to 7 feet of snow and ~180km/h wind speeds. They're built with cedar struts to withstand humidity, marine-grade aluminum hubs for strength, and polycarbonate panels that provide a 1.6 R-value and are fully recyclable.
In Canada, these growing domes are sold by Arctic Acres:
In the US, these growing domes are sold by Growing Spaces: https://growingspaces.com/
The growing domes have a specific number of intake and exhaust fans based on their square footage and the CFM (cubic foot per minute) required. These fans are powered by solar panels and they don't need an external power source to function.
There are quite a few additional passive solar features that help regulate the temperature inside the domes, including aluminum shade cloth, bicarbonate spray coating, a reflectix wall, a thermal mass pond, and geothermal ventilation.