My orchids are not blooming

[WhiteRabbit]

Warm air blowing on the spike, as well as cold drafts from the window could cause buds to die.
Keep the plant from being blown on by the heat, and I also woudln't worry about opening the windows either. I'd also recommend against spraying water on the leaves.

I grow and bloom Phals in a north facing window, so it's not necessarily too dark there.