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

If you can't take the heat ... stay out of the man-cave!

@isochronism   Good to know.

@daveyf If heat really is the deal (and installing inexpensive venting is out of the question), then you might consider a class D amp, as they run the coolest of any kind of amp. There are some class D amps now that rival tubes for smoothness and detail. However one thing about class D (and nearly all solid state amps for that matter) is that you have to have enough power that you never clip the amp. Tubes are different in that they can have such a graceful overload character that you don't know that the amp is clipping- hence the myth that tube power is somehow more powerful than solid state power. But its a myth; its just that they overload differently.

I don't think you are ever going to find an amp that runs totally cool.  There is electric flowing through it and that is going to generate at least a little heat

The coolest amps are going to be class Ds no question but even they give off a little heat.  Rogue's Hydra and Dragon are class D's with tube input stages.  They are excellent.  I have the hydra and it doesn't heat up much.  The Sphinx and Pharaoh are integrated amp options from them.

AVMs Evolution A 5.2 is a hybrid Class D integrated amps with a tube input stage.  

i am sure there are other Class D Hybrids.  

These will be the closest you are going to get to cool tube amps if LTA is not an option.  .