Actually, he might run the A/C but keep it set at 80 degrees (like I do). There's air conditioning and then there's AIR CONDITIONING.
Most malls, stores, etc. use the latter -- where many people need to put on a sweater. It's not natural (or sane) to need a sweater when it's objectively 90 degrees outside.
Remember, he's not Amish or something. He flies on a plane *how many times a year*? He also approved a new state of the art PC for the audio department while I was there. His answer was: "Workmen need tools." He just wants us to understand WHAT technology does to us, then we can go ahead and use anything that is necessary for our life.
Too many people today think technology is 100% positive -- which leads them to use "the more the better". They instant message family members in the same house, keep the A/C at 70 degrees, e-mail family members in the same town but never visit, wear an MP3 player all day, etc. But the truth is, technology often has a downside. There is a place for face-to-face human interaction, nature, silence, etc. which many people today seem to forget.
Another thing many people doesn't realize, is that Bishop Williamson is actually very kind, charitable, and thoughtful. He might be hard on himself, but he showed plenty of mercy to the men he was training to be priests. How much more would he be kind to women and children?
When it came to principles and the Truth, he was like a lion. But if he MET a woman who had a higher education, etc. he wouldn't forget the law of Charity or something. He, like Our Lord, wishes for all souls to be saved. He understands how most people are these days -- it's just that he'd like to change the world to be more Catholic. But he's not going to take it out on one particular woman with a college degree (or even a woman wearing pants). He is certainly a wise old man.