What integrated would you recommend for summer amp?

My room has its own AC unit and dedicated thermostat. The room is noticeably warmer with the amp on and the AC runs more. I also have two other pieces of tube gear as noted above. So the three of them put out a bit of heat. 
Great amp suggestions. I’m off to research them.   
I don’t need much juice as my speakers are efficient. The Quad, Raven and Sprout are interesting. 

Raven is beyond interesting. It is superior. Would never try and talk you out of that. But really, you could also just turn the thermostat down.

I have been searching for an amp too.  I would encourage you to check out the Raven or the Linear Tube Audio line of amps. 

Just heard Nagra classic integrated amp unbelievable hearing is believing