Are there any tube amps that don't give off any---


HEAT!! 
I have a very small dedicated listening room, and so I was wondering IF there are any tube amps..I guess hybrid or all tube ( although more all tube)- that simply give off NO heat or very very little heat after full warm up. Since the climate seems to be getting hotter, it would be nice to have the benefits of a tube amp with no heat whatsoever. ( is this even possible?). 
Running AC isn't my preferred way of listening in a small room, so this question is now on my mind. I do not want to consider Class D solid state amps...as I know they are an option from a heat perspective...but just tubes.
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Do like many do a very good SS amp like high quality amplifier
and a Vacuum tube preamplifier a great combination of punch and dynamics, and still get some tube soundstaging and layering.
You can also buy high quality vacuum tube digital as an option 
pleanty of options if you have the $$. You didnot stste your budget 
or how much power you need to drive your speakers.
I have an LTA Z10. It puts off less heat than even some class D amps I’ve had. Very cool running for a tube amp and for almost any amp. 
Al Gore says there is no relationship between tube amps and climate change :).  
mine when it is in the off position