I have many catts in an eastern window getting direct sun for two years now and are doing fine.
The plants will tell you if they don't like it.
Most orchids like at least a 15 degree differential between day and night (especially over the winter I think) so cut the heat in there if you can this winter.
Keep that fan going day and night also, this according to AOS top dog Ron McHatton Phd.
Enjoy