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

The tubes our amps utilize are called, "thermionic" because their cathodes must be heated, to emit electrons.             Thus far; no one’s developed another method, regarding vacuum amplification/rectification (except, perhaps, Unicorn Audio).

If you use a higher efficiency speaker you can generally use a lower powered amp.  In addition, some designs use less power and put off less heat.

LTAs run relatively cool.  The other amps that run cooler are the current Bob Carver amps. Neither are cold but both run dramatically cooler than traditional tube amps.   

I see MC is up and Atom.. That's planet "Uranus", runs VERY cool, but a slight, "outhouse" smell as the day goes on..:-)

NOW

I don't know what your winters are like, but I swap my tube amps out in the summer for class Ds. I use Valve amps in the late fall, winter and spring (cool summer nights if we have any). It keeps the house quit toasty, when I really get going.. I use a Mac preamps, C20-C2500s, all valves.

Have the best of both worlds.. No idea on your speakers, and the actual room size. 

Mac has a hybrid. Valve pre section, and SS amp section. They run pretty cool. They will provide you with running temps too. They always have good data, just have to know where to find it.. 

Personally a valve pre amp with Valve/SS power amps, nothing better.
Next in line for the money, a GOOD integrated, tube pre/SS amp section.

I wonder if anyone is making an Integrated with a tube (valve) pre amp and Class Ds for the power amp? I'm sure they are out there. Easy enough to do it with separates.

The valve in the preamp can get hot to, 6SN7s get hot, a lot of preamps use them now too..Carys, and Freya +, I love them, but they run HOT...

Regards

Why not just vent the heat out of the room? A ceiling vent isn't expensive to install and some dryer duct hose will send it out of the house with the help of an inexpensive low speed fan. Then air conditioning won't have any trouble keeping up; you may not even need it.


But here's the thing. Most tube amps get docked about heat due to the filaments of the tubes. Literally the only tube where this is a thing is the 6C33; with any octal-based power tubes the heat contributed by the filament is inconsequential. So that means most of the heat is coming from the class of operation, and will be about the same amount as a solid state amp running the same class of operation and making the same power. I know this because our amps make about as much heat as any for their power, but if in Standby (no B+ on the power tubes) you can have the amps on all day and walk up to them and grab a power tube and hang on. They just aren't that hot.


The only way I can think of to get away from that is a class D amplifier. So if that's out of the question, then do vents in the ceiling. It will cost a few hundred dollars but you can have the fan operated by a wall switch and no impact from the heat of the amps in your room as long as the vents are above the amps (heat rises, after all...).