An open window ok to induce flowers?

[My Green Pets]

Hello orchid board,

My phals have grown well this summer but this week the temps here in Paris have really dropped.

The temp of our home has cooled quite a bit (from 30 to low 20s C/80s to 70s F) due to the outside temps (we don't use heat/AC), but will this be enough to induce flowers?

If I leave the window open at night it will get pretty chilly, like 12°C/53°F. Otherwise the house will just gradually get cooler and cooler as winter sets in, bottoming out at around 16°C/60°F when it's really cold out.

Just confused because on the one hand I've read to keep the plants away from drafts but on the other hand it says they need a chill to set spike and I don't see the difference.

[WhiteRabbit]

A hot or cold draft can cause bud / bloom drop. Being in front of an opened window should be fine. Usually by drafts, what is meant is like blowing from an a/c or heat vent. Plants in nature are exposed to breezes, and cooler temps at night.