Looking for tube amp suggestions

I've had a pair of Zu Druids for about 1 1/2 years and also have an Almarro 318b set integrated driving them. This type of speaker and tube amps are new to me. Prior to this I had a tube preamp and an SS amp with a 3-way (4 driver) speaker.

I live in Bangkok, Thailand and don't particularly like air conditioning. (Except when using the amp, a fan is all I need.) My room is 13 x 17 with 7 1/2 foot ceilings. The 6c33c tube is VERY hot. I'd like to know if there are other tube options that will be significantly cooler than the 6c33c tube. I'm open to any circuit type.

Thanks for any advice. Bill