Different amps for summer and winter?

I use Lamm M1.2R for Winter and Lamm ML2.1 for Summer.

I have a friend who owns the Pass XS150 and the XA100.5. He used the former last Winter and plans to use the latter again this Summer. At least that is the plan because the XS is much hotter. I'm waiting to hear if he has switched over yet.

In the past, for multiple reasons, I tried cooler SS amps during of the hot summer months. I was rewarded with a much lower air-conditioning bills. That experience made me miss my room heating, 10 tube per channel power hungry amps. I quickly sold the SS amps and resigned myself to extra heat and higher electric bills. On the plus side my thermostat is located adjacent to my listening room, so it's pretty cool in the remainder of the house. FYI: I live in the Great South West Desert, where the Summer temp's reach 115 degrees for weeks at a time.

Tube amp for the Winter.

I also live in Austin (Hi SVAR!) ... I do remember when I had only the old high bias Rowland M7... So hot that my 2nd floor music loft was unusable from June through the end of September.

In More recent times, during Summer I have been using mostly the cool running class D Rowland M312, except for Summer 2012, when I was running the fairly warm class A/B Rowland M725 monos. Winters have been on Rowland M625 or M725. But coming summer I hopefully will operate the new Rowland M925 monos, which -- I have been told -- generate little heat.

Guido