Low-heat-output amp for Devore O/96

Large amplifiers may seem to run cooler, only because they have more area to radiate heat.
The one sure way to know how much heat is being dissipated (at least for comparisons) s the wattage dissipated at idle.
Almost all of the energy at idle is being wasted as heat.
Most SS amps after idle level at reasonably efficient.
Class A and partial Class A are wasting more energy since the idle is at the full level rated at class A watts, even at idle.

Anyway, the idle wattage rating is what to look at.

The  Linear Tube Audio Zotl 10MkII I cannot find any rating for idle wattage on the home page of the company, nor at any review.
I guess tube amp owners do not want to know!

Thanks for all the great suggestions thus far. fsonicsmith, I am responding to your post only because I don’t want anyone to get the impression that the 9/96 is putting me to sleep. I clearly stated that I tend to doze off only when I’m playing background music and reading. I’m always wide awake and engaged when I listen for the music, the 0/96 is the finest speaker I’ve ever had. I’m 65 and falling asleep/napping is now a guilty pleasure for me, I certainly don’t consider it a "problem." And the heating of the room in the summer with tube amps is real, I'm not the only person who has reported this. Not all of us blast the AC constantly, it's expensive and it's also noisy, and I don't like noise in my listening room.

Ladok, I apologize for my snarky and somewhat arrogant post. A few years ago our A/C had gone out of service and while my wife and I were waiting for our HVAC system to be replaced, I tried listening. At that time my amp was an ARC VS110 which is open-architecture with no cooling fans. I went from tolerably warm to insufferably hot within an hour. So I understand your predicament and I should not have used your post to attempt a segue into promoting high power amps with the DeVores which I acknowledge being something of a private non-industry-related agenda. I have no way to prove it, but it seems as though my Ref150se puts out less heat than my VS110 despite having the same number of output tubes. 

the heating of the room in the summer with tube amps is real, I'm not the only person who has reported this. Not all of us blast the AC constantly, it's expensive and it's also noisy, and I don't like noise in my listening room.

We have a customer in Guatemala City with our largest amp, the MA-3. That's a class A triode amp that makes over 500 watts. Despite the number of tubes, because it is so much more efficient, it does not run a whole lot hotter than our MA-2s, but:

He does not like air conditioning, and doesn't have it.

Yet he can play the amps all day and night in his listening room at any time of the year and it stays comfortable. The room is really not that large; about 17 feet wide and 20 feet deep at the most (I've been there). With two fairly small ducts in the ceiling above the amps, connected by ductwork similar to what you would use with a clothes drier, he conducts the heat out of the room and out of the house. The sound of the single fan he uses for this is barely audible at the listening chair. He controls the fan with a light switch on the wall. It really does work!

The Pass XA25 is a spectacular amp worth looking into.  I run it with AZ Crescendo 2's, a 90 dB speaker, no complaints.  At 96 dB the Devores  would both rock the house and play low with finesse.  The XA is 240 W at idle while my 125 W (tubed) ARC REF3 preamp has noticeably more heat.  Go figure.