This has prompted a recent heated debate on the implications of the meta-modules and the requires keywords. As Richard Hall, Sun employee and Felix commiter, writes

As one side of a rotating body (i.e. an asteroid) is heated by the sun's radiation, the surface rotating away from the sun will be warmer than the surface rotating into sunlight.

Unlike a greenhouse which USES a heating system, a hoop house is heated by the warmth of the sun.