Which orchids DO NOT need a temp drop to bloom?

[Orchidtinkerer]

Dolly has listed some nice examples although the den phals need to be kept at higher temperatures than the rest which are cooler growing.
Similar temps to phalaenopsis which also only require a minimal temperature difference.

If you research the Cattleya, you will find a few that do not require much difference, I found the Cattleya jenmanii recently for my climate which only requires a 3C difference.

So Epidendrum, Encyclia and oncidium all good choices but do research them as I found Encyclia's can be hot or cool growing.

Angraecum Magdalenae is often grown on a windowsill but it can be hard to find these days, there are some Maxillaria's that will do well on a windowsill but not all so check which are available and what their requirements are.